{"id":3626,"date":"2023-11-21T10:08:46","date_gmt":"2023-11-21T02:08:46","guid":{"rendered":"http:\/\/www.ponybai.com\/?p=3626"},"modified":"2023-11-21T10:08:48","modified_gmt":"2023-11-21T02:08:48","slug":"apex-class%e7%b1%bb","status":"publish","type":"post","link":"http:\/\/www.ponybai.com\/?p=3626","title":{"rendered":"Apex Class\u7c7b"},"content":{"rendered":"\n<p>\u4e0e Java \u4e00\u6837\uff0c\u60a8\u53ef\u4ee5\u5728 Apex Class\u4e2d\u521b\u5efa\u7c7b\u3002<dfn>\u7c7b<\/dfn>\u662f\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u7684\u6a21\u677f\u6216\u84dd\u56fe\u3002<dfn>\u5bf9\u8c61<\/dfn>\u662f\u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u8be5\u7c7b\u63cf\u8ff0\u6574\u4e2a\u8d2d\u4e70 \u8ba2\u5355\uff0c\u4ee5\u53ca\u60a8\u53ef\u4ee5\u4f7f\u7528\u91c7\u8d2d\u8ba2\u5355\u6267\u884c\u7684\u6240\u6709\u64cd\u4f5c\u3002\u7c7b\u7684\u5b9e\u4f8b\u662f\u7279\u5b9a\u7684\u91c7\u8d2d\u8ba2\u5355 \u60a8\u53d1\u9001\u6216\u63a5\u6536\u7684\u5185\u5bb9\u3002<samp>PurchaseOrder<\/samp><samp>PurchaseOrder<\/samp><\/p>\n\n\n\n<p>\u6240\u6709\u5bf9\u8c61\u90fd\u6709<dfn>\u72b6\u6001<\/dfn>\u548c<dfn>\u884c\u4e3a<\/dfn>\uff0c\u5373 \u5bf9\u8c61\u77e5\u9053\u81ea\u5df1\uff0c\u4ee5\u53ca\u5bf9\u8c61\u53ef\u4ee5\u505a\u7684\u4e8b\u60c5\u3002\u72b6\u6001 PurchaseOrder \u5bf9\u8c61\uff08\u5b83\u6240\u77e5\u9053\u7684\u5bf9\u8c61\uff09\u5305\u62ec\u53d1\u9001\u5b83\u7684\u7528\u6237\u3001\u65e5\u671f \u4ee5\u53ca\u5b83\u7684\u521b\u5efa\u65f6\u95f4\uff0c\u4ee5\u53ca\u5b83\u662f\u5426\u88ab\u6807\u8bb0\u4e3a\u91cd\u8981\u3002\u884c\u4e3a PurchaseOrder \u5bf9\u8c61\uff08\u5b83\u53ef\u4ee5\u505a\u4ec0\u4e48\uff09\u5305\u62ec\u68c0\u67e5\u5e93\u5b58\u3001\u53d1\u8d27 \u4ea7\u54c1\uff0c\u6216\u901a\u77e5\u5ba2\u6237\u3002<\/p>\n\n\n\n<p>\u7c7b\u53ef\u4ee5\u5305\u542b\u53d8\u91cf\u548c\u65b9\u6cd5\u3002\u53d8\u91cf\u7528\u4e8e\u6307\u5b9a \u5bf9\u8c61\uff0c\u4f8b\u5982\u5bf9\u8c61\u7684 \u6216 .\u7531\u4e8e\u8fd9\u4e9b\u53d8\u91cf\u4e0e \u7c7b\u5e76\u4e14\u662f\u5b83\u7684\u6210\u5458\uff0c\u5b83\u4eec\u901a\u5e38\u88ab\u79f0\u4e3a<dfn>\u6210\u5458 \u53d8\u91cf<\/dfn>\u3002\u65b9\u6cd5\u7528\u4e8e\u63a7\u5236\u884c\u4e3a\uff0c\u4f8b\u5982 \u6216 \u3002<samp>Name<\/samp><samp>Type<\/samp><samp>getOtherQuotes<\/samp><samp>copyLineItems<\/samp><\/p>\n\n\n\n<p>\u7c7b\u53ef\u4ee5\u5305\u542b\u5176\u4ed6\u7c7b\u3001\u5f02\u5e38\u7c7b\u578b\u548c\u521d\u59cb\u5316\u4ee3\u7801\u3002<\/p>\n\n\n\n<p><a><\/a><dfn>\u63a5\u53e3<\/dfn>\u5c31\u50cf\u4e00\u4e2a\u7c7b\uff0c\u5176\u4e2d\u6ca1\u6709\u4e00\u4e2a \u65b9\u6cd5\u5df2\u5b9e\u73b0 &#8211; \u65b9\u6cd5\u7b7e\u540d\u5728\u90a3\u91cc\uff0c\u4f46 \u6bcf\u4e2a\u65b9\u6cd5\u90fd\u662f\u7a7a\u7684\u3002\u8981\u4f7f\u7528\u63a5\u53e3\uff0c\u53e6\u4e00\u4e2a\u7c7b\u5fc5\u987b\u901a\u8fc7\u63d0\u4f9b \u63a5\u53e3\u4e2d\u5305\u542b\u7684\u6240\u6709\u65b9\u6cd5\u7684\u4e3b\u4f53\u3002<\/p>\n\n\n\n<p>\u6709\u5173\u7c7b\u3001\u5bf9\u8c61\u548c\u63a5\u53e3\u7684\u66f4\u591a\u5e38\u89c4\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u00a0http:\/\/java.sun.com\/docs\/books\/tutorial\/java\/concepts\/index.html<\/p>\n\n\n\n<p>\u9664\u4e86\u7c7b\u4e4b\u5916\uff0cApex \u8fd8\u63d0\u4f9b\u89e6\u53d1\u5668\u3001 \u7c7b\u4f3c\u4e8e\u6570\u636e\u5e93\u89e6\u53d1\u5668\u3002\u89e6\u53d1\u5668\u662f\u6267\u884c\u7684 Apex \u4ee3\u7801 \u5728\u6570\u636e\u5e93\u64cd\u4f5c\u4e4b\u524d\u6216\u4e4b\u540e\u3002\u8bf7\u53c2\u9605\u89e6\u53d1\u5668\u3002<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Apex \u7c7b\u5b9a\u4e49<\/li>\n\n\n\n<li>\u7c7b\u53d8\u91cf<\/li>\n\n\n\n<li>\u7c7b\u65b9\u6cd5<\/li>\n\n\n\n<li>\u4f7f\u7528\u6784\u9020\u51fd\u6570<\/li>\n\n\n\n<li>\u8bbf\u95ee\u4fee\u9970\u7b26<\/li>\n\n\n\n<li>\u9759\u6001\u548c\u5b9e\u4f8b\u65b9\u6cd5\u3001\u53d8\u91cf\u548c\u521d\u59cb\u5316\u4ee3\u7801<br>\u5728 Apex \u4e2d\uff0c\u60a8\u53ef\u4ee5\u62e5\u6709<dfn>\u9759\u6001<\/dfn>\u65b9\u6cd5\u3001\u53d8\u91cf\u548c\u521d\u59cb\u5316\u4ee3\u7801\u3002\u4f46\u662f\uff0cApex \u7c7b\u4e0d\u80fd\u662f\u9759\u6001\u7684\u3002\u8fd8\u53ef\u4ee5\u5177\u6709<dfn>\u5b9e\u4f8b<\/dfn>\u65b9\u6cd5\u3001\u6210\u5458\u53d8\u91cf\u548c\u521d\u59cb\u5316\u4ee3\u7801\uff08\u6ca1\u6709\u4fee\u9970\u7b26\uff09\u548c<dfn>\u5c40\u90e8<\/dfn>\u53d8\u91cf\u3002<\/li>\n\n\n\n<li>Apex \u5c5e\u6027<\/li>\n\n\n\n<li>\u6269\u5c55\u7c7b<br>\u53ef\u4ee5\u6269\u5c55\u7c7b\u4ee5\u63d0\u4f9b\u66f4\u4e13\u4e1a\u7684\u884c\u4e3a\u3002<\/li>\n\n\n\n<li>\u6269\u5c55\u7c7b\u793a\u4f8b<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Apex \u7c7b\u5b9a\u4e49<\/h2>\n\n\n\n<p>\u5728 Apex \u4e2d\uff0c\u60a8\u53ef\u4ee5\u5b9a\u4e49\u9876\u7ea7\u7c7b\uff08\u4e5f\u79f0\u4e3a\u5916\u90e8\u7c7b\uff09\u4ee5\u53ca\u5185\u90e8\u7c7b\uff0c \u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u53e6\u4e00\u4e2a\u7c7b\u4e2d\u5b9a\u4e49\u7684\u7c7b\u3002\u5185\u90e8\u7c7b\u53ea\u80fd\u6709\u4e00\u4e2a\u7ea7\u522b\u6df1\u3002\u4e3a \u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class myOuterClass {\n   \/\/ Additional myOuterClass code here\n   class myInnerClass {\n     \/\/ myInnerClass code here\n   }\n}<\/code><\/pre>\n\n\n\n<p>\u82e5\u8981\u5b9a\u4e49\u7c7b\uff0c\u8bf7\u6307\u5b9a\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u8bbf\u95ee\u4fee\u9970\u7b26\uff1a\n<ul class=\"wp-block-list\">\n<li>\u60a8\u5fc5\u987b\u5728\u9876\u7ea7\u7684\u58f0\u660e\u4e2d\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26\u4e4b\u4e00\uff08\u5982 \u6216 \uff09 \u7c7b\u3002<samp>public<\/samp><samp>global<\/samp><\/li>\n\n\n\n<li>\u4e0d\u5fc5\u5728\u5185\u90e8\u7c7b\u7684\u58f0\u660e\u4e2d\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u53ef\u9009\u7684\u5b9a\u4e49\u4fee\u9970\u7b26\uff08\u5982 \u3001 \u7b49\uff09<samp>virtual<\/samp><samp>abstract<\/samp><\/li>\n\n\n\n<li>\u5fc5\u9700\uff1a\u5173\u952e\u5b57\u540e\u8ddf\u7c7b\u540d\u79f0<samp>class<\/samp><\/li>\n\n\n\n<li>\u53ef\u9009\u6269\u5c55\u6216\u5b9e\u73b0\uff0c\u6216\u4e24\u8005\u517c\u800c\u6709\u4e4b<\/li>\n<\/ol>\n\n\n\n<p>\u6ce8\u610f<\/p>\n\n\n\n<p>\u907f\u514d\u5bf9\u7c7b\u540d\u4f7f\u7528\u6807\u51c6\u5bf9\u8c61\u540d\u3002\u8fd9\u6837\u505a \u5bfc\u81f4\u610f\u5916\u7ed3\u679c\u3002\u6709\u5173\u6807\u51c6\u5bf9\u8c61\u7684\u5217\u8868\uff0c\u8bf7\u53c2\u9605\u00a0Salesforce \u7684\u5bf9\u8c61\u53c2\u8003\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\u5b9a\u4e49\u7c7b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>private | public | global \n&#91;virtual | abstract | with sharing | without sharing] \nclass<em> ClassName<\/em> &#91;implements<em> InterfaceNameList<\/em>] &#91;extends<em> ClassName<\/em>] \n{ \n\/\/ The body of the class\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>access \u4fee\u9970\u7b26\u58f0\u660e\u6b64\u7c7b\u662f \u4ec5\u5728\u672c\u5730\u77e5\u9053\uff0c\u5373\u4ec5\u901a\u8fc7\u8fd9\u90e8\u5206\u4ee3\u7801\u77e5\u9053\u3002\u8fd9\u662f\u9ed8\u8ba4\u8bbe\u7f6e \u5185\u90e8\u7c7b\u7684\u8bbf\u95ee\u6743\u9650 &#8211; \u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u672a\u6307\u5b9a\u8bbf\u95ee\u4fee\u9970\u7b26 \u5bf9\u4e8e\u5185\u90e8\u7c7b\uff0c\u5b83\u88ab\u8ba4\u4e3a\u662f .\u6b64\u5173\u952e\u5b57\u53ea\u80fd\u4e0e\u5185\u90e8\u7c7b\uff08\u6216 \u6807\u6709\u6ce8\u89e3\u7684\u9876\u7ea7\u6d4b\u8bd5\u7c7b\uff09\u3002<samp>private<\/samp><samp>private<\/samp><samp>@IsTest<\/samp><\/li>\n\n\n\n<li>\u8bbf\u95ee\u4fee\u9970\u7b26 \u58f0\u660e\u6b64\u7c7b\u5728\u5e94\u7528\u7a0b\u5e8f\u6216\u547d\u540d\u7a7a\u95f4\u4e2d\u53ef\u89c1\u3002<samp>public<\/samp><\/li>\n\n\n\n<li>access \u4fee\u9970\u7b26\u58f0\u660e\u6b64\u7c7b\u662f \u6240\u6709 Apex \u4ee3\u7801\u90fd\u5e7f\u4e3a\u4eba\u77e5\u3002<samp>global<\/samp><a><\/a>\u6240\u6709\u73ed\u7ea7 \u5305\u542b\u7528\u5173\u952e\u5b57\u5b9a\u4e49\u7684\u65b9\u6cd5\u5fc5\u987b\u58f0\u660e\u4e3a \u3002\u5982\u679c\u65b9\u6cd5\u6216\u5185\u90e8\u7c7b\u662f \u58f0\u660e\u4e3a \uff0c\u5916\u90e8\uff0c \u9876\u7ea7\u7c7b\u4e5f\u5fc5\u987b\u5b9a\u4e49\u4e3a \u3002<samp>webservice<\/samp><samp>global<\/samp><samp>global<\/samp><samp>global<\/samp><\/li>\n\n\n\n<li>\u548c\u5173\u952e\u5b57\u6307\u5b9a\u6b64\u7c7b\u7684\u5171\u4eab\u6a21\u5f0f\u3002\u6b32\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff0c \u8bf7\u53c2\u9605\u4f7f\u7528\u6709\u5171\u4eab\u3001\u65e0\u5171\u4eab\u548c\u7ee7\u627f\u5171\u4eab\u5173\u952e\u5b57\u3002<samp>with sharingwithout sharing<\/samp><\/li>\n\n\n\n<li>\u5b9a\u4e49\u4fee\u9970\u7b26\u58f0\u660e\u6b64 \u7c7b\u5141\u8bb8\u6269\u5c55\u548c\u8986\u76d6\u3002\u4e0d\u80fd\u4f7f\u7528\u5173\u952e\u5b57\u91cd\u5199\u65b9\u6cd5\uff0c\u9664\u975e\u7c7b \u5df2\u5b9a\u4e49\u4e3a \u3002<samp>virtual<\/samp><samp>override<\/samp><samp>virtual<\/samp><\/li>\n\n\n\n<li>\u5b9a\u4e49 modifier \u58f0\u660e\u6b64\u7c7b\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\uff0c \u662f\uff0c\u53ea\u58f0\u660e\u5176\u7b7e\u540d\u800c\u4e0d\u5b9a\u4e49\u4e3b\u4f53\u7684\u65b9\u6cd5\u3002<samp>abstract<\/samp><\/li>\n<\/ul>\n\n\n\n<p>\u6ce8\u610f<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728\u5c06\u62bd\u8c61\u65b9\u6cd5\u4e0a\u4f20\u5230\u5168\u5c40\u7c7b\u540e\uff0c\u65e0\u6cd5\u5c06\u62bd\u8c61\u65b9\u6cd5\u6dfb\u52a0\u5230\u5168\u5c40\u7c7b\u4e2d \u6258\u7ba1 &#8211; \u5df2\u53d1\u5e03\u7684\u5305\u7248\u672c\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u201c\u6258\u7ba1 &#8211; \u5df2\u53d1\u5e03\u201d\u5305\u4e2d\u7684\u7c7b\u662f\u865a\u62df\u7684\uff0c\u5219\u53ef\u4ee5\u5411\u5176\u6dfb\u52a0\u7684\u65b9\u6cd5 \u8fd8\u5fc5\u987b\u662f\u865a\u62df\u7684\uff0c\u5e76\u4e14\u5fc5\u987b\u5177\u6709\u5b9e\u73b0\u3002<\/li>\n\n\n\n<li>\u4e0d\u80fd\u91cd\u5199\u5df2\u5b89\u88c5\u7684\u5168\u5c40\u7c7b\u7684\u516c\u5171\u6216\u53d7\u4fdd\u62a4\u7684\u865a\u62df\u65b9\u6cd5 \u6258\u7ba1\u5305\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u6709\u5173\u6258\u7ba1\u5305\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u4ec0\u4e48\u662f\u5305\uff1f\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\uff0c\u4f46\u53ea\u80fd\u6269\u5c55\u4e00\u4e2a\u73b0\u6709\u7c7b\u3002\u6b64\u9650\u5236 \u8868\u793a Apex \u4e0d\u652f\u6301\u591a\u91cd\u7ee7\u627f\u3002\u5217\u8868\u4e2d\u7684\u63a5\u53e3\u540d\u79f0 \u7528\u9017\u53f7\u5206\u9694\u3002\u6709\u5173\u63a5\u53e3\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u63a5\u53e3\u3002<\/p>\n\n\n\n<p>\u6709\u5173\u65b9\u6cd5\u548c\u53d8\u91cf\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u89c1\u8bbf\u95ee\u4fee\u9970\u7b26\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7c7b\u53d8\u91cf<\/h2>\n\n\n\n<p>\u82e5\u8981\u58f0\u660e\u53d8\u91cf\uff0c\u8bf7\u6307\u5b9a\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u9009\uff1a\u4fee\u9970\u7b26\uff0c\u4f8b\u5982 \u6216 \uff0c\u4ee5\u53ca \u3002<samp>public<\/samp><samp>final<\/samp><samp>static<\/samp><\/li>\n\n\n\n<li>\u5fc5\u9700\uff1a\u53d8\u91cf\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f8b\u5982 String \u6216 Boolean\u3002<\/li>\n\n\n\n<li>\u5fc5\u9700\uff1a\u53d8\u91cf\u7684\u540d\u79f0\u3002<\/li>\n\n\n\n<li>\u53ef\u9009\uff1a\u53d8\u91cf\u7684\u503c\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5b9a\u4e49 \u53d8\u91cf\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;public | private | protected | global] &#91;final] &#91;static] <em>data_type<\/em><em> variable_name<\/em> \n&#91;= <em>value<\/em>]<\/code><\/pre>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>private static final Integer MY_INT; \n      private final Integer i = 1;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7248\u672c\u5316\u884c\u4e3a\u66f4\u6539<\/h2>\n\n\n\n<p>\u5728 API \u7248\u672c 50.0 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u8303\u56f4\u548c\u53ef\u8bbf\u95ee\u6027\u89c4\u5219\u5f3a\u5236\u6267\u884c \u5e26\u6ce8\u91ca\u7684 Apex \u53d8\u91cf\u3001\u65b9\u6cd5\u3001\u5185\u90e8\u7c7b\u548c\u63a5\u53e3 \u8ddf\u3002\u4e3a \u8f85\u52a9\u529f\u80fd\u6ce8\u610f\u4e8b\u9879\uff0c\u8bf7\u53c2\u9605\u00a0NamespaceAccessible \u6ce8\u91ca\u3002\u6709\u5173\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c \u8bf7\u53c2\u9605\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4 \u7b2c\u4e8c\u4ee3\u8f6f\u4ef6\u5305\u4e2d Apex \u7c7b\u7684\u53ef\u89c1\u6027\u3002<samp>@namespaceAccessible<\/samp><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7c7b\u65b9\u6cd5<\/h2>\n\n\n\n<p>\u82e5\u8981\u5b9a\u4e49\u65b9\u6cd5\uff0c\u8bf7\u6307\u5b9a\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u9009\uff1a\u4fee\u9970\u7b26\uff0c\u4f8b\u5982 \u6216 .<samp>public<\/samp><samp>protected<\/samp><\/li>\n\n\n\n<li>\u5fc5\u9700\uff1a\u65b9\u6cd5\u8fd4\u56de\u7684\u503c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f8b\u5982 String \u6216 \u6574\u6570\u3002\u5982\u679c\u65b9\u6cd5\u4e0d\u4f7f\u7528\uff0c\u8bf7\u4f7f\u7528 \u8fd4\u56de\u4e00\u4e2a\u503c\u3002<samp>void<\/samp><\/li>\n\n\n\n<li>\u5fc5\u9700\uff1a\u65b9\u6cd5\u7684\u8f93\u5165\u53c2\u6570\u5217\u8868\uff0c\u7528\u9017\u53f7\u5206\u9694\uff0c\u6bcf\u4e2a\u53c2\u6570 \u524d\u9762\u662f\u5176\u6570\u636e\u7c7b\u578b\uff0c\u5e76\u62ec\u5728\u62ec\u53f7\u4e2d\u3002\u5982\u679c\u6ca1\u6709\u53c2\u6570\uff0c\u8bf7\u4f7f\u7528 \u7a7a\u62ec\u53f7\u3002\u4e00\u4e2a\u65b9\u6cd5\u53ea\u80fd\u6709 32 \u4e2a\u8f93\u5165\u53c2\u6570\u3002<samp>()<\/samp><\/li>\n\n\n\n<li>\u5fc5\u9700\uff1a\u65b9\u6cd5\u7684\u4e3b\u4f53\uff0c\u7528\u5927\u62ec\u53f7\u62ec\u8d77\u6765\u3002\u8be5\u65b9\u6cd5\u7684\u6240\u6709\u4ee3\u7801\uff0c\u5305\u62ec \u6b64\u5904\u5305\u542b\u4efb\u4f55\u5c40\u90e8\u53d8\u91cf\u58f0\u660e\u3002<samp>{}<\/samp><\/li>\n<\/ul>\n\n\n\n<p>\u5b9a\u4e49 \u65b9\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;public | private | protected | global] &#91;override] &#91;static] <em>data_type<\/em><em><\/em> method_name \n(<em>input<\/em> parameters) \n{\n\/\/ The body of the method\n}<\/code><\/pre>\n\n\n\n<p>\u6ce8\u610f<\/p>\n\n\n\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528 \u4ec5\u5728\u5df2\u5b9a\u4e49\u4e3a \u6216 \u7684\u7c7b\u4e2d\u8986\u76d6\u65b9\u6cd5\u3002<samp>override<\/samp><samp>virtual<\/samp><samp>abstract<\/samp>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public static Integer getInt() { \n     return MY_INT; \n  }<\/code><\/pre>\n\n\n\n<p>\u4e0e Java \u4e00\u6837\uff0c\u8fd4\u56de\u503c\u7684\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u8bed\u53e5\u8fd0\u884c\uff0c\u5982\u679c\u5176\u7ed3\u679c \u672a\u5206\u914d\u7ed9\u5176\u4ed6\u53d8\u91cf\u3002\u7528\u6237\u5b9a\u4e49\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u4ee5\u5728\u4f7f\u7528\u7cfb\u7edf\u65b9\u6cd5\u7684\u4efb\u4f55\u5730\u65b9\u4f7f\u7528\u3002<\/li>\n\n\n\n<li>\u53ef\u4ee5\u662f\u9012\u5f52\u7684\u3002<\/li>\n\n\n\n<li>\u53ef\u80fd\u4f1a\u4ea7\u751f\u526f\u4f5c\u7528\uff0c\u4f8b\u5982\u521d\u59cb\u5316 sObject \u8bb0\u5f55 ID \u7684 DML \u8bed\u53e5\u3002\u8bf7\u53c2\u9605\u00a0Apex DML \u8bed\u53e5\u3002<samp>insert<\/samp><\/li>\n\n\n\n<li>\u53ef\u4ee5\u5f15\u7528\u5b83\u4eec\u81ea\u5df1\u6216\u7a0d\u540e\u5728\u540c\u4e00\u7c7b\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\uff0c\u6216\u8005 \u533f\u540d\u5757\u3002Apex \u5206\u4e24\u4e2a\u9636\u6bb5\u89e3\u6790\u65b9\u6cd5\uff0c\u56e0\u6b64 forward \u58f0\u660e \u4e0d\u9700\u8981\u3002<\/li>\n\n\n\n<li>\u53ef\u4ee5\u662f\u591a\u6001\u6027\u7684\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u5b9e\u73b0\u540d\u4e3a\u7684\u65b9\u6cd5\uff0c\u4e00\u79cd\u662f\u4f7f\u7528\u5355\u4e2a Integer \u53c2\u6570\uff0c\u4e00\u4e2a\u5305\u542b\u4e24\u4e2a Integer \u53c2\u6570\u3002\u53d6\u51b3\u4e8e\u65b9\u6cd5\u662f\u5426 \u8c03\u7528\u4e00\u4e2a\u6216\u4e24\u4e2a\u6574\u6570\uff0cApex \u89e3\u6790\u5668\u9009\u62e9\u9002\u5f53\u7684 \u8981\u6267\u884c\u7684\u5b9e\u73b0\u3002\u5982\u679c\u89e3\u6790\u5668\u627e\u4e0d\u5230\u5b8c\u5168\u5339\u914d\uff0c\u5219 \u4f7f\u7528\u7c7b\u578b\u5f3a\u5236\u89c4\u5219\u5bfb\u6c42\u8fd1\u4f3c\u5339\u914d\u3002\u6b32\u4e86\u89e3\u66f4\u591a\u4fe1\u606f \u6570\u636e\u8f6c\u6362\uff0c\u8be6\u89c1 \u8f6c\u6362\u3002<samp>example<\/samp>\u6ce8\u610f\u5982\u679c\u89e3\u6790\u5668\u627e\u5230\u591a\u4e2a\u8fd1\u4f3c\u5339\u914d\u9879\uff0c\u5219 \u751f\u6210\u89e3\u6790\u65f6\u5f02\u5e38\u3002<\/li>\n\n\n\n<li>\u5177\u6709 void \u8fd4\u56de\u7c7b\u578b\u7684\u65b9\u6cd5\u901a\u5e38\u4f5c\u4e3a\u72ec\u7acb\u8bed\u53e5\u8c03\u7528 \u5728 Apex \u4ee3\u7801\u4e2d\u3002\u4e3a \u4f8b\uff1a<code>System.debug('Here is a note for the log.');<\/code><\/li>\n\n\n\n<li>\u53ef\u4ee5\u6709\u8fd4\u56de\u503c\u4f5c\u4e3a\u8bed\u53e5\u8fd0\u884c\u7684\u8bed\u53e5\uff0c\u5982\u679c\u5b83\u4eec\u7684 \u7ed3\u679c\u4e0d\u4f1a\u5206\u914d\u7ed9\u5176\u4ed6\u53d8\u91cf\u3002\u6b64\u89c4\u5219\u5728 Java \u4e2d\u76f8\u540c\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u6309\u503c\u4f20\u9012\u65b9\u6cd5\u53c2\u6570<\/h2>\n\n\n\n<p><a><\/a>\u5728 Apex \u4e2d\uff0c\u6240\u6709\u539f\u59cb\u6570\u636e\u7c7b\u578b\u53c2\u6570\uff0c\u4f8b\u5982 Integer \u6216 String\uff0c\u6309\u503c\u4f20\u9012\u5230\u65b9\u6cd5\u4e2d\u3002\u8fd9\u4e00\u4e8b\u5b9e\u610f\u5473\u7740\u5bf9 \u53c2\u6570\u4ec5\u5b58\u5728\u4e8e\u65b9\u6cd5\u7684\u8303\u56f4\u5185\u3002\u5f53\u65b9\u6cd5 \u8fd4\u56de\u65f6\uff0c\u5bf9\u53c2\u6570\u7684\u66f4\u6539\u5c06\u4e22\u5931\u3002<\/p>\n\n\n\n<p><a><\/a>\u975e\u57fa\u5143\u6570\u636e\u7c7b\u578b\u53c2\u6570\uff08\u5982 sObjects\uff09\u662f \u901a\u8fc7\u5f15\u7528\u4f20\u9012\u5230\u65b9\u6cd5\u4e2d\u3002\u56e0\u6b64\uff0c\u5f53\u8be5\u65b9\u6cd5\u8fd4\u56de\u65f6\uff0c \u4f20\u5165\u7684\u53c2\u6570\u4ecd\u5f15\u7528\u4e0e\u65b9\u6cd5\u8c03\u7528\u4e4b\u524d\u76f8\u540c\u7684\u5bf9\u8c61\u3002 \u5728\u8be5\u65b9\u6cd5\u4e2d\uff0c\u4e0d\u80fd\u66f4\u6539\u5f15\u7528\u4ee5\u6307\u5411\u53e6\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4f46 \u53ef\u4ee5\u66f4\u6539\u5bf9\u8c61\u5b57\u6bb5\u7684\u503c\u3002<\/p>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4f20\u9012\u57fa\u5143\u548c\u975e\u57fa\u5143\u6570\u636e\u7c7b\u578b\u53c2\u6570\u7684\u793a\u4f8b into \u65b9\u6cd5\u3002<\/p>\n\n\n\n<p><strong>\u793a\u4f8b\uff1a\u4f20\u9012\u57fa\u5143\u6570\u636e\u7c7b\u578b\u53c2\u6570<\/strong>\u6b64\u793a\u4f8b\u6f14\u793a\u5982\u4f55\u5c06 String \u7c7b\u578b\u7684\u57fa\u5143\u53c2\u6570\u6309\u503c\u4f20\u9012\u5230 \u53e6\u4e00\u79cd\u65b9\u6cd5\u3002\u6b64\u793a\u4f8b\u4e2d\u7684\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a String \u53d8\u91cf \uff0c \u548c \u4e3a\u5176\u8d4b\u503c\u3002\u7136\u540e\uff0c\u5b83\u5c06\u6b64\u53d8\u91cf\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u65b9\u6cd5\uff0c \u4fee\u6539\u6b64 String \u7684\u503c\u3002\u4f46\u662f\uff0c\u7531\u4e8e String \u662f\u57fa\u5143\u7c7b\u578b\uff0c \u5b83\u662f\u6309\u503c\u4f20\u9012\u7684\uff0c\u5f53\u65b9\u6cd5\u8fd4\u56de\u65f6\uff0c\u539f\u59cb\u7684\u503c \u53d8\u91cf \uff0c \u4fdd\u6301\u4e0d\u53d8\u3002assert \u8bed\u53e5\u9a8c\u8bc1 \u7684\u4ef7\u503c\u4ecd\u7136\u662f\u65e7\u7684 \u4ef7\u503c\u3002<\/p>\n\n\n\n<p><samp>debugStatusMessage<\/samp><var>msg<\/var><var>msg<\/var><var>msg<\/var><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class PassPrimitiveTypeExample {\n    public static void debugStatusMessage() {\n        String msg = 'Original value';\n        processString(msg);\n        \/\/ The value of the msg variable didn't\n        \/\/ change; it is still the old value.\n        System.assertEquals(msg, 'Original value');\n    }\n    \n    public static void processString(String s) {\n        s = 'Modified value';\n    }\n}<\/code><\/pre>\n\n\n\n<p><strong>\u793a\u4f8b\uff1a\u4f20\u9012\u975e\u57fa\u5143\u6570\u636e\u7c7b\u578b\u53c2\u6570<\/strong><\/p>\n\n\n\n<p>\u6b64\u793a\u4f8b\u6f14\u793a\u5982\u4f55\u901a\u8fc7\u5f15\u7528\u5c06 List \u53c2\u6570\u4f20\u9012\u5230\u65b9\u6cd5\u4e2d\u5e76\u5bf9\u5176\u8fdb\u884c\u4fee\u6539\u3002\u7136\u540e \u5728\u65b9\u6cd5\u4e2d\uff0c\u663e\u793a \u4e0d\u80fd\u5c06 List \u53c2\u6570\u66f4\u6539\u4e3a\u6307\u5411\u53e6\u4e00\u4e2a List \u5bf9\u8c61\u3002<samp>reference()<\/samp><samp>referenceNew()<\/samp>\u4e00\u3001\u65b9\u6cd5 \u521b\u5efa\u4e00\u4e2a\u53d8\u91cf \uff0c\u8be5\u53d8\u91cf\u662f\u6574\u6570\u5217\u8868\u5e76\u4f20\u9012 \u5b83\u53d8\u6210\u4e86\u4e00\u79cd\u65b9\u6cd5\u3002\u8c03\u7528\u7684\u65b9\u6cd5\u4f7f\u7528\u8868\u793a\u7684\u6574\u6570\u503c\u586b\u5145\u6b64\u5217\u8868 \u56db\u820d\u4e94\u5165\u7684\u6e29\u5ea6\u503c\u3002\u5f53\u8be5\u65b9\u6cd5\u8fd4\u56de\u65f6\uff0cassert \u8bed\u53e5\u5c06\u9a8c\u8bc1 \u539f\u59cb List \u53d8\u91cf\u7684\u5185\u5bb9\u5df2\u66f4\u6539\uff0c\u73b0\u5728\u5305\u542b\u4e94\u4e2a \u503c\u3002\u63a5\u4e0b\u6765\uff0c\u8be5\u793a\u4f8b\u521b\u5efa\u7b2c\u4e8c\u4e2a List \u53d8\u91cf \uff0c\u5e76\u5c06\u5176\u4f20\u9012\u7ed9\u53e6\u4e00\u4e2a\u65b9\u6cd5\u3002\u8c03\u7528\u7684\u65b9\u6cd5 \u5c06\u4f20\u5165\u7684\u53c2\u6570\u5206\u914d\u7ed9\u65b0\u521b\u5efa\u7684\u5305\u542b\u65b0 Integer \u7684 List \u503c\u3002\u5f53\u65b9\u6cd5\u8fd4\u56de\u65f6\uff0c\u539f\u59cb\u53d8\u91cf \u4e0d\u6307\u5411\u65b0\u5217\u8868\uff0c\u4f46\u4ecd\u6307\u5411\u539f\u59cb\u5217\u8868\uff0c\u8be5\u5217\u8868\u4e3a\u7a7a\u3002 assert \u8bed\u53e5\u9a8c\u8bc1\u4e0d\u5305\u542b \u503c\u3002<\/p>\n\n\n\n<p><samp>createTemperatureHistory<\/samp><var>fillMe<\/var><var>createMe<\/var><var>createMe<\/var><var>createMe<\/var><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class PassNonPrimitiveTypeExample {\n    \n    public static void createTemperatureHistory() {\n        List&lt;Integer&gt; fillMe = new List&lt;Integer&gt;();        \n        reference(fillMe);\n        \/\/ The list is modified and contains five items\n        \/\/ as expected.\n        System.assertEquals(fillMe.size(),5);        \n        \n        List&lt;Integer&gt; createMe = new List&lt;Integer&gt;();\n        referenceNew(createMe);\n        \/\/ The list is not modified because it still points\n        \/\/ to the original list, not the new list \n        \/\/ that the method created.\n        System.assertEquals(createMe.size(),0);     \n    }\n            \n    public static void reference(List&lt;Integer&gt; m) {\n        \/\/ Add rounded temperatures for the last five days.\n        m.add(70);\n        m.add(68);\n        m.add(75);\n        m.add(80);\n        m.add(82);\n    }    \n        \n    public static void referenceNew(List&lt;Integer&gt; m) {\n        \/\/ Assign argument to a new List of\n        \/\/ five temperature values.\n        m = new List&lt;Integer&gt;{55, 59, 62, 60, 63};\n    }    \n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7248\u672c\u5316\u884c\u4e3a\u66f4\u6539<\/h2>\n\n\n\n<p>\u5728 API \u7248\u672c 50.0 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u8303\u56f4\u548c\u53ef\u8bbf\u95ee\u6027\u89c4\u5219\u5728 Apex \u4e0a\u5f3a\u5236\u6267\u884c \u7528 \u6ce8\u91ca\u7684\u53d8\u91cf\u3001\u65b9\u6cd5\u3001\u5185\u90e8\u7c7b\u548c\u63a5\u53e3\u3002\u5bf9\u4e8e\u53ef\u8bbf\u95ee\u6027 \u6ce8\u610f\u4e8b\u9879\uff0c\u8bf7\u53c2\u9605\u00a0NamespaceAccessible \u6ce8\u91ca\u3002\u6709\u5173\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027 \u9002\u7528\u4e8e\u7b2c\u4e8c\u4ee3\u8f6f\u4ef6\u5305\u4e2d\u7684 Apex \u7c7b\u3002<samp>@namespaceAccessible<\/samp><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u6784\u9020\u51fd\u6570<\/h2>\n\n\n\n<p><dfn>\u6784\u9020\u51fd\u6570<\/dfn>\u662f\u4ece\u7c7b\u521b\u5efa\u5bf9\u8c61\u65f6\u8c03\u7528\u7684\u4ee3\u7801 \u84dd\u56fe\u3002\u60a8\u4e0d\u9700\u8981\u4e3a\u6bcf\u4e2a\u7c7b\u7f16\u5199\u6784\u9020\u51fd\u6570\u3002\u5982\u679c\u4e00\u4e2a\u7c7b\u6ca1\u6709 \u7528\u6237\u5b9a\u4e49\u7684\u6784\u9020\u51fd\u6570\uff0c\u4f7f\u7528\u9ed8\u8ba4\u7684\u3001\u65e0\u53c2\u6570\u7684\u516c\u5171\u6784\u9020\u51fd\u6570\u3002<\/p>\n\n\n\n<p>\u6784\u9020\u51fd\u6570\u7684\u8bed\u6cd5\u7c7b\u4f3c\u4e8e\u65b9\u6cd5\uff0c\u4f46\u6709\u6240\u4e0d\u540c \u4ece\u65b9\u6cd5\u5b9a\u4e49\uff0c\u56e0\u4e3a\u5b83\u4ece\u6765\u5c31\u6ca1\u6709\u663e\u5f0f\u8fd4\u56de\u7c7b\u578b \u5e76\u4e14\u5b83\u4e0d\u4f1a\u88ab\u4ece\u5b83\u521b\u5efa\u7684\u5bf9\u8c61\u7ee7\u627f\u3002\u7f16\u5199\u7c7b\u7684\u6784\u9020\u51fd\u6570\u540e\uff0c\u5fc5\u987b\u4f7f\u7528\u5173\u952e\u5b57\u624d\u80fd\u5b9e\u4f8b\u5316 \u8be5\u7c7b\u4e2d\u7684\u5bf9\u8c61\uff0c\u4f7f\u7528\u8be5\u6784\u9020\u51fd\u6570\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 \u4ee5\u4e0b\u7c7b\uff1a<\/p>\n\n\n\n<p><samp>new<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class TestObject {\n\n   \/\/ The no argument constructor \n   public TestObject() {\n      \/\/ more code here\n  }\n}<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5b9e\u4f8b\u5316\u6b64\u7c7b\u578b\u7684\u65b0\u5bf9\u8c61 \u6cd5\u5178\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TestObject myTest = new TestObject();<\/code><\/pre>\n\n\n\n<p>\u5982\u679c\u7f16\u5199\u4e00\u4e2a\u63a5\u53d7\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528\u8be5\u6784\u9020\u51fd\u6570\u521b\u5efa\u4e00\u4e2a \u5bf9\u8c61\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u521b\u5efa\u63a5\u53d7\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\uff0c\u5e76\u4e14\u4ecd\u5e0c\u671b\u4f7f\u7528\u65e0\u53c2\u6570 \u6784\u9020\u51fd\u6570\uff0c\u5219\u5fc5\u987b\u5728\u4ee3\u7801\u4e2d\u521b\u5efa\u81ea\u5df1\u7684\u65e0\u53c2\u6570\u6784\u9020\u51fd\u6570\u3002\u521b\u5efa \u6784\u9020\u51fd\u6570\uff0c\u5219\u60a8\u4e0d\u518d\u6709\u6743\u8bbf\u95ee\u9ed8\u8ba4\u7684\u65e0\u53c2\u6570\u516c\u5171 \u6784\u9020 \u51fd\u6570\u3002\u5728 Apex \u4e2d\uff0c\u6784\u9020\u51fd\u6570\u53ef\u4ee5<dfn>\u91cd\u8f7d<\/dfn>\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u53ef\u4ee5 \u4e00\u4e2a\u7c7b\u7684\u591a\u4e2a\u6784\u9020\u51fd\u6570\uff0c\u6bcf\u4e2a\u6784\u9020\u51fd\u6570\u90fd\u6709\u4e0d\u540c\u7684\u53c2\u6570\u3002 \u4e0b\u9762\u7684\u793a\u4f8b\u6f14\u793a\u4e00\u4e2a\u5177\u6709\u4e24\u4e2a\u6784\u9020\u51fd\u6570\u7684\u7c7b\uff1a\u4e00\u4e2a \u6ca1\u6709\u53c2\u6570\uff0c\u5e76\u4e14\u91c7\u7528\u7b80\u5355\u7684 Integer \u53c2\u6570\u3002\u5b83 \u8fd8\u9610\u91ca\u4e86\u4e00\u4e2a\u6784\u9020\u51fd\u6570\u5982\u4f55\u4f7f\u7528 \u8bed\u6cd5\uff0c\u4e5f \u79f0\u4e3a<dfn>\u6784\u9020\u51fd\u6570\u94fe\u63a5<\/dfn>\u3002<\/p>\n\n\n\n<p><samp>this(&#8230;)<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class TestObject2 {\n\nprivate static final Integer DEFAULT_SIZE = 10;\n\nInteger size;\n\n   \/\/Constructor with no arguments\n   public TestObject2() {\n       this(DEFAULT_SIZE); \/\/ Using this(...) calls the one argument constructor    \n   }\n\n   \/\/ Constructor with one argument \n   public TestObject2(Integer ObjectSize) {\n     size = ObjectSize;  \n   }\n}<\/code><\/pre>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5b9e\u4f8b\u5316\u6b64\u7c7b\u578b\u7684\u65b0\u5bf9\u8c61 \u6cd5\u5178\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TestObject2 myObject1 = new TestObject2(42);\n  TestObject2 myObject2 = new TestObject2();<\/code><\/pre>\n\n\n\n<p>\u4e3a\u7c7b\u521b\u5efa\u7684\u6bcf\u4e2a\u6784\u9020\u51fd\u6570\u90fd\u5fc5\u987b\u5177\u6709\u4e0d\u540c \u53c2\u6570\u5217\u8868\u3002\u5728\u4e0b\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6240\u6709\u6784\u9020\u51fd\u6570\u90fd\u662f \u53ef\u80fd\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Leads {\n\n  \/\/ First a no-argument constructor \n  public Leads () {}\n\n  \/\/ A constructor with one argument\n  public Leads (Boolean call) {}\n\n  \/\/ A constructor with two arguments\n  public Leads (String email, Boolean call) {}\n\n  \/\/ Though this constructor has the same arguments as the \n  \/\/ one above, they are in a different order, so this is legal\n  public Leads (Boolean call, String email) {}\n}<\/code><\/pre>\n\n\n\n<p>\u5b9a\u4e49\u65b0\u7c7b\u65f6\uff0c\u5c31\u662f\u5728\u5b9a\u4e49\u65b0\u7684\u6570\u636e\u7c7b\u578b\u3002 \u60a8\u53ef\u4ee5\u5728\u4efb\u4f55\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u6570\u636e\u7c7b\u578b\u540d\u79f0\u7684\u5730\u65b9\u4f7f\u7528\u7c7b\u540d\uff0c \u4f8b\u5982 String\u3001Boolean \u6216 Account\u3002\u5982\u679c\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\uff0c\u5176 type \u662f\u4e00\u4e2a\u7c7b\uff0c\u5206\u914d\u7ed9\u5b83\u7684\u4efb\u4f55\u5bf9\u8c61\u90fd\u5fc5\u987b\u662f \u8be5\u7c7b\u6216\u5b50\u7c7b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8bbf\u95ee\u4fee\u9970\u7b26<\/h2>\n\n\n\n<p>Apex \u5141\u8bb8\u60a8\u4f7f\u7528 \u3001 \u3001 \u548c access \u4fee\u9970\u7b26 \u5b9a\u4e49\u65b9\u6cd5\u548c\u53d8\u91cf\u65f6\u3002<samp>private<\/samp><samp>protected<\/samp><samp>public<\/samp><samp>global<\/samp><\/p>\n\n\n\n<p>\u867d\u7136\u89e6\u53d1\u5668\u548c\u533f\u540d\u5757\u4e5f\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e9b\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u4f46\u5b83\u4eec\u5728 Apex \u7684\u8f83\u5c0f\u90e8\u5206\u3002\u4f8b\u5982\uff0c\u5c06\u65b9\u6cd5\u58f0\u660e\u4e3a\u533f\u540d\u5757\u4e2d\u7684\u65b9\u6cd5\u5e76\u4e0d\u80fd\u8c03\u7528 \u5b83\u6765\u81ea\u8be5\u4ee3\u7801\u7684\u5916\u90e8\u3002<samp>global<\/samp><\/p>\n\n\n\n<p>\u6709\u5173\u7c7b\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u66f4\u591a\u4fe1\u606f\uff0c\u8bf7\u53c2\u89c1\u00a0Apex \u7c7b\u5b9a\u4e49\u3002<\/p>\n\n\n\n<p>\u6ce8\u610f<\/p>\n\n\n\n<p>\u63a5\u53e3\u65b9\u6cd5\u6ca1\u6709\u8bbf\u95ee\u4fee\u9970\u7b26\u3002\u5b83\u4eec\u59cb\u7ec8\u662f\u5168\u7403\u6027\u7684\u3002\u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u63a5\u53e3\u3002<\/p>\n\n\n\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u65b9\u6cd5\u6216\u53d8\u91cf\u4ec5\u5bf9\u5b9a\u4e49\u4e2d\u7684 Apex \u4ee3\u7801\u53ef\u89c1<em>\u00a0\u7c7b<\/em>\u3002\u663e\u5f0f\u6307\u5b9a\u65b9\u6cd5\u6216\u53d8\u91cf\u4e3a\u516c\u5171\u65b9\u6cd5\u6216\u53d8\u91cf\uff0c\u4ee5\u4fbf\u5c06\u5176\u6307\u5b9a\u4e3a public \u53ef\u7528\u4e8e\u540c\u4e00\u5e94\u7528\u7a0b\u5e8f\u547d\u540d\u7a7a\u95f4\u4e2d\u7684\u5176\u4ed6\u7c7b\uff08\u8bf7\u53c2\u9605\u547d\u540d\u7a7a\u95f4\u524d\u7f00\uff09\u3002\u60a8\u53ef\u4ee5\u66f4\u6539 \u4f7f\u7528\u4ee5\u4e0b\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u53ef\u89c1\u6027\u7ea7\u522b\uff1a<samp>private<\/samp>\u6b64\u8bbf\u95ee\u4fee\u9970\u7b26\u662f\u9ed8\u8ba4\u503c\uff0c\u8868\u793a \u65b9\u6cd5\u6216\u53d8\u91cf\u53ea\u80fd\u5728\u5b9a\u4e49\u5b83\u7684 Apex \u7c7b\u4e2d\u8bbf\u95ee\u3002 \u5982\u679c\u672a\u6307\u5b9a\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u5219\u65b9\u6cd5\u6216\u53d8\u91cf\u4e3a .<samp>privateprotected<\/samp>\u8fd9\u610f\u5473\u7740\u8be5\u65b9\u6cd5\u6216\u53d8\u91cf\u5bf9 \u5b9a\u4e49 Apex \u7c7b\uff0c\u4ee5\u53ca\u6269\u5c55\u5b9a\u4e49 Apex \u7c7b\u7684\u7c7b\u3002\u60a8\u53ef\u4ee5 \u4ec5\u5c06\u6b64\u8bbf\u95ee\u4fee\u9970\u7b26\u7528\u4e8e\u5b9e\u4f8b\u65b9\u6cd5\u548c\u6210\u5458\u53d8\u91cf\u3002\u6b64\u8bbe\u7f6e \u4e25\u683c\u6765\u8bf4\uff0c\u5b83\u6bd4\u9ed8\u8ba4\uff08\u79c1\u6709\uff09\u8bbe\u7f6e\u66f4\u5bbd\u677e\uff0c\u5c31\u50cf Java \u4e00\u6837\u3002<samp>public<\/samp>\u8fd9\u8868\u793a\u65b9\u6cd5\u6216\u53d8\u91cf\u53ef\u4f9b\u6240\u6709\u4eba\u8bbf\u95ee \u7279\u5b9a\u5305\u4e2d\u7684 Apex\u3002\u9002\u7528\u4e8e\u6240\u6709\u7b2c\u4e8c\u4ee3 \uff082GP\uff09 \u5171\u4eab\u547d\u540d\u7a7a\u95f4\u7684\u6258\u7ba1\u5305\u4e0e\u6ce8\u91ca\u4e00\u8d77\u4f7f\u7528\u3002\u5728 no-namespace \u5305\u5c06 Apex \u4ee3\u7801\u9690\u5f0f\u5448\u73b0\u4e3a @NamespaceAccessible\u3002<samp>public@NamespaceAccessible<\/samp><\/p>\n\n\n\n<p>\u6ce8\u610f<\/p>\n\n\n\n<p>\u5728 Apex \u4e2d\uff0c\u8bbf\u95ee modifier \u4e0e Java \u4e2d\u7684\u4fee\u9970\u7b26\u4e0d\u540c\u3002\u8fd9\u6837\u505a\u662f\u4e3a\u4e86\u963b\u6b62\u52a0\u5165 \u5e94\u7528\u7a0b\u5e8f\uff0c\u4ee5\u5c06\u6bcf\u4e2a\u5e94\u7528\u7a0b\u5e8f\u7684\u4ee3\u7801\u5206\u5f00\u3002\u5728 Apex \u4e2d\uff0c\u5982\u679c\u60a8\u613f\u610f \u8981\u50cf\u5728 Java \u4e2d\u90a3\u6837\u516c\u5f00\u67d0\u4e9b\u5185\u5bb9\uff0c\u5fc5\u987b\u4f7f\u7528 access \u4fee\u9970\u7b26\u3002<samp>publicglobal<\/samp>\u6709\u5173\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027 \u9002\u7528\u4e8e\u7b2c\u4e8c\u4ee3\u8f6f\u4ef6\u5305\u4e2d\u7684 Apex \u7c7b\u3002<samp>global<\/samp>\u8fd9\u8868\u793a\u8be5\u65b9\u6cd5\u6216\u53d8\u91cf\u53ef\u4ee5\u7531\u4efb\u4f55 Apex \u4ee3\u7801\u4f7f\u7528 \u53ef\u4ee5\u8bbf\u95ee\u8be5\u7c7b\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u540c\u4e00\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684 Apex \u4ee3\u7801\u3002\u8fd9 \u8bbf\u95ee\u4fee\u9970\u7b26\u5fc5\u987b\u7528\u4e8e\u5fc5\u987b\u5728 \u5e94\u7528\u7a0b\u5e8f\uff0c\u65e0\u8bba\u662f\u5728 SOAP API \u4e2d\u8fd8\u662f\u901a\u8fc7\u5176\u4ed6 Apex \u4ee3\u7801\u3002\u5982\u679c\u58f0\u660e\u65b9\u6cd5\u6216 \u53d8\u91cf\u4e3a \uff0c\u60a8\u8fd8\u5fc5\u987b\u58f0\u660e \u4ee5 .<samp>globalglobal<\/samp><\/p>\n\n\n\n<p>\u6ce8\u610f<\/p>\n\n\n\n<p>\u6211\u4eec\u5efa\u8bae\u5f88\u5c11\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26\uff08\u5982\u679c\u6709\u7684\u8bdd\uff09\u3002\u8de8\u5e94\u7528\u7a0b\u5e8f \u4f9d\u8d56\u5173\u7cfb\u96be\u4ee5\u7ef4\u62a4\u3002<samp>global<\/samp><\/p>\n\n\n\n<p>\u8981\u4f7f\u7528 \u3001 \u3001 \u6216 access \u4fee\u9970\u7b26\uff0c\u8bf7\u4f7f\u7528 \u8bed\u6cd5\u5982\u4e0b\uff1a<samp>private<\/samp><samp>protected<\/samp><samp>public<\/samp><samp>global<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;(none)|private|protected|public|global] <em>declaration<\/em><\/code><\/pre>\n\n\n\n<p>\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ private variable s1\nprivate string s1 = '1';\n\n\/\/ public method getsz()\npublic string getsz() { \n   ... \n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u9759\u6001\u548c\u5b9e\u4f8b\u65b9\u6cd5\u3001\u53d8\u91cf\u548c\u521d\u59cb\u5316 \u6cd5\u5178<\/h2>\n\n\n\n<p>\u5728 Apex \u4e2d\uff0c\u60a8\u53ef\u4ee5\u62e5\u6709<dfn>\u9759\u6001<\/dfn>\u65b9\u6cd5\u3001\u53d8\u91cf\u548c\u521d\u59cb\u5316 \u6cd5\u5178\u3002\u4f46\u662f\uff0cApex \u7c7b\u4e0d\u80fd\u662f\u9759\u6001\u7684\u3002\u8fd8\u53ef\u4ee5\u5177\u6709<dfn>\u5b9e\u4f8b<\/dfn>\u65b9\u6cd5\u3001\u6210\u5458\u53d8\u91cf\u548c\u521d\u59cb\u5316\u4ee3\u7801\uff08\u6ca1\u6709\u4fee\u9970\u7b26\uff09\u548c<dfn>\u5c40\u90e8<\/dfn>\u53d8\u91cf\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7279\u6027<\/h2>\n\n\n\n<p>\u9759\u6001\u65b9\u6cd5\u3001\u53d8\u91cf\u548c\u521d\u59cb\u5316\u4ee3\u7801\u5177\u6709\u8fd9\u4e9b\u7279\u5f81\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b83\u4eec\u4e0e\u7c7b\u76f8\u5173\u8054\u3002<\/li>\n\n\n\n<li>\u5b83\u4eec\u53ea\u5141\u8bb8\u5728\u5916\u90e8\u7c7b\u4e2d\u4f7f\u7528\u3002<\/li>\n\n\n\n<li>\u5b83\u4eec\u4ec5\u5728\u52a0\u8f7d\u7c7b\u65f6\u521d\u59cb\u5316\u3002<\/li>\n\n\n\n<li>\u5b83\u4eec\u4e0d\u4f1a\u4f5c\u4e3a Visualforce \u9875\u9762\u89c6\u56fe\u72b6\u6001\u7684\u4e00\u90e8\u5206\u8fdb\u884c\u4f20\u8f93\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5b9e\u4f8b\u65b9\u6cd5\u3001\u6210\u5458\u53d8\u91cf\u548c\u521d\u59cb\u5316\u4ee3\u7801\u5177\u6709\u8fd9\u4e9b \u7279\u6027\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b83\u4eec\u4e0e\u7279\u5b9a\u5bf9\u8c61\u76f8\u5173\u8054\u3002<\/li>\n\n\n\n<li>\u5b83\u4eec\u6ca1\u6709\u5b9a\u4e49\u4fee\u9970\u7b26\u3002<\/li>\n\n\n\n<li>\u5b83\u4eec\u662f\u4f7f\u7528\u4ece\u5b83\u4eec\u6240\u5728\u7684\u7c7b\u5b9e\u4f8b\u5316\u7684\u6bcf\u4e2a\u5bf9\u8c61\u521b\u5efa\u7684 \u5ba3\u5e03\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5c40\u90e8\u53d8\u91cf\u5177\u6709\u8fd9\u4e9b\u7279\u5f81\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b83\u4eec\u4e0e\u58f0\u660e\u5b83\u4eec\u7684\u4ee3\u7801\u5757\u76f8\u5173\u8054\u3002<\/li>\n\n\n\n<li>\u5728\u4f7f\u7528\u5b83\u4eec\u4e4b\u524d\uff0c\u5fc5\u987b\u5bf9\u5176\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u4e0b\u9762\u7684\u793a\u4f8b\u6f14\u793a\u4e00\u4e2a\u5c40\u90e8\u53d8\u91cf\uff0c\u5176\u4f5c\u7528\u57df\u662f\u4ee3\u7801\u5757\u7684\u6301\u7eed\u65f6\u95f4\u3002<samp>if<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Boolean myCondition = true;\nif (myCondition) {\n    integer localVariable = 10;\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u9759\u6001\u65b9\u6cd5\u548c\u53d8\u91cf<\/h2>\n\n\n\n<p>\u53ea\u80fd\u5c06\u9759\u6001\u65b9\u6cd5\u548c\u53d8\u91cf\u7528\u4e8e\u5916\u90e8\u7c7b\u3002\u5185\u90e8\u7c7b\u6709 \u6ca1\u6709\u9759\u6001\u65b9\u6cd5\u6216\u53d8\u91cf\u3002\u9759\u6001\u65b9\u6cd5\u6216\u53d8\u91cf\u4e0d\u9700\u8981 \u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n\n\n\n<p>\u5728\u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u4e4b\u524d\uff0c\u7c7b\u4e2d\u7684\u6240\u6709\u9759\u6001\u6210\u5458\u53d8\u91cf\u90fd\u662f \u521d\u59cb\u5316\uff0c\u5e76\u6267\u884c\u6240\u6709\u9759\u6001\u521d\u59cb\u5316\u4ee3\u7801\u5757\u3002\u8fd9\u4e9b\u9879\u76ee\u662f \u6309\u7167\u5b83\u4eec\u5728\u7c7b\u4e2d\u51fa\u73b0\u7684\u987a\u5e8f\u8fdb\u884c\u5904\u7406\u3002<\/p>\n\n\n\n<p>\u9759\u6001\u65b9\u6cd5\u7528\u4f5c\u5b9e\u7528\u7a0b\u5e8f\u65b9\u6cd5\uff0c\u5b83\u4ece\u4e0d\u4f9d\u8d56\u4e8e \u5b9e\u4f8b\u6210\u5458\u53d8\u91cf\u3002\u56e0\u4e3a\u9759\u6001\u65b9\u6cd5\u53ea\u4e0e\u7c7b\u76f8\u5173\u8054\uff0c \u5b83\u65e0\u6cd5\u8bbf\u95ee\u5176\u7c7b\u7684\u5b9e\u4f8b\u6210\u5458\u53d8\u91cf\u503c\u3002<\/p>\n\n\n\n<p>\u9759\u6001\u53d8\u91cf\u4ec5\u5728 Apex \u4e8b\u52a1\u8303\u56f4\u5185\u662f\u9759\u6001\u7684\u3002 \u5b83\u4e0d\u662f\u6574\u4e2a\u670d\u52a1\u5668\u6216\u6574\u4e2a\u7ec4\u7ec7\u7684\u9759\u6001\u3002a \u7684\u503c \u9759\u6001\u53d8\u91cf\u5728\u5355\u4e2a\u4e8b\u52a1\u7684\u4e0a\u4e0b\u6587\u4e2d\u4fdd\u7559\u5e76\u91cd\u7f6e \u8de8\u8d8a\u4e8b\u52a1\u8fb9\u754c\u3002\u4f8b\u5982\uff0c\u5982\u679c Apex DML \u8bf7\u6c42\u5bfc\u81f4\u89e6\u53d1\u5668 \u82e5\u8981\u591a\u6b21\u89e6\u53d1\uff0c\u9759\u6001\u53d8\u91cf\u4f1a\u5728\u8fd9\u4e9b\u89e6\u53d1\u5668\u4e2d\u4fdd\u7559 \u8c03\u7528\u3002<\/p>\n\n\n\n<p>\u82e5\u8981\u5b58\u50a8\u8de8\u7c7b\u5b9e\u4f8b\u5171\u4eab\u7684\u4fe1\u606f\uff0c\u8bf7\u4f7f\u7528\u9759\u6001 \u53d8\u91cf\u3002\u540c\u4e00\u7c7b\u7684\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\u9759\u6001\u7684\u5355\u4e2a\u526f\u672c \u53d8\u91cf\u3002\u4f8b\u5982\uff0c\u5355\u4e2a\u4e8b\u52a1\u751f\u6210\u7684\u6240\u6709\u89e6\u53d1\u5668\u90fd\u53ef\u4ee5\u901a\u4fe1 \u901a\u8fc7\u67e5\u770b\u548c\u66f4\u65b0\u76f8\u5173\u7c7b\u4e2d\u7684\u9759\u6001\u53d8\u91cf\u6765\u76f8\u4e92\u5173\u8054\u3002\u4e00\u4e2a \u9012\u5f52\u89e6\u53d1\u5668\u53ef\u4ee5\u4f7f\u7528\u7c7b\u53d8\u91cf\u7684\u503c\u6765\u786e\u5b9a\u4f55\u65f6\u9000\u51fa \u9012\u5f52\u3002<\/p>\n\n\n\n<p>\u5047\u8bbe\u60a8\u6709\u4ee5\u4e0b\u7c7b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class P { \n   public static boolean firstRun = true; \n}<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\uff0c\u4f7f\u7528\u6b64\u7c7b\u7684\u89e6\u53d1\u5668\u53ef\u80fd\u4f1a\u9009\u62e9\u6027\u5730\u4f7f \u89e6\u53d1\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>trigger T1 on Account (before delete, after delete, after undelete) { \n       if(Trigger.isBefore){\n          if(Trigger.isDelete){\n             if(p.firstRun){\n                 Trigger.old&#91;0].addError('Before Account Delete Error');\n                  p.firstRun=false;\n              } \n           }\n        }\n}<\/code><\/pre>\n\n\n\n<p>\u89e6\u53d1\u5668\u4e2d\u5b9a\u4e49\u7684\u9759\u6001\u53d8\u91cf\u4e0d\u4f1a\u5728\u4e0d\u540c \u540c\u4e00\u4e8b\u52a1\u4e2d\u7684\u89e6\u53d1\u4e0a\u4e0b\u6587\uff0c\u4f8b\u5982\u5728\u63d2\u5165\u4e4b\u524d\u548c \u63d2\u5165\u8c03\u7528\u540e\u3002\u76f8\u53cd\uff0c\u5728\u7c7b\u4e2d\u5b9a\u4e49\u9759\u6001\u53d8\u91cf\uff0c\u4ee5\u4fbf \u89e6\u53d1\u5668\u53ef\u4ee5\u8bbf\u95ee\u8fd9\u4e9b\u7c7b\u6210\u5458\u53d8\u91cf\u5e76\u68c0\u67e5\u5176\u9759\u6001\u53d8\u91cf \u503c\u3002<\/p>\n\n\n\n<p>\u65e0\u6cd5\u901a\u8fc7\u7c7b\u7684\u5b9e\u4f8b\u8bbf\u95ee\u7c7b\u9759\u6001\u53d8\u91cf\u3002\u5982\u679c\u7c7b\u6709\u4e00\u4e2a\u9759\u6001\u53d8\u91cf\uff0c\u5e76\u4e14\u662f \u7684\u5b9e\u4f8b\uff0c\u5219\u4e0d\u662f\u5408\u6cd5\u7684\u8868\u8fbe\u5f0f\u3002<samp>MyClass<\/samp><samp>myStaticVariable<\/samp><samp>myClassInstance<\/samp><samp>MyClass<\/samp><samp>myClassInstance.myStaticVariable<\/samp><\/p>\n\n\n\n<p>\u5b9e\u4f8b\u65b9\u6cd5\u4e5f\u662f\u5982\u6b64\u3002\u5982\u679c\u662f\u9759\u6001\u65b9\u6cd5\uff0c\u5219\u4e0d\u5408\u6cd5\u3002\u76f8\u53cd\uff0c\u8bf7\u53c2\u8003\u90a3\u4e9b \u4f7f\u7528\u7c7b\u7684\u9759\u6001\u6807\u8bc6\u7b26\uff1a \u548c .<samp>myStaticMethod()<\/samp><samp>myClassInstance.myStaticMethod()<\/samp><samp>MyClass.myStaticVariable<\/samp><samp>MyClass.myStaticMethod()<\/samp>\u5c40\u90e8\u53d8\u91cf\u540d\u5728\u7c7b\u540d\u4e4b\u524d\u8ba1\u7b97\u3002\u5982\u679c\u5c40\u90e8\u53d8\u91cf\u5177\u6709 \u4e0e\u7c7b\u540c\u540d\uff0c\u5c40\u90e8\u53d8\u91cf\u9690\u85cf\u4e86 \u540c\u540d\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6ce8\u91ca\u6389\u8be5\u884c\uff0c\u5219\u6b64\u65b9\u6cd5\u6709\u6548\u3002\u4f46\u662f\uff0c\u5982\u679c\u5305\u542b\u8be5\u884c\uff0c\u5219\u8be5\u65b9\u6cd5\u4e0d\u4f1a compile\uff0c\u56e0\u4e3a Salesforce \u62a5\u544a\u8be5\u65b9\u6cd5\u4e0d\u5b58\u5728\u6216\u5177\u6709 \u4e0d\u5c0d \u7b7e\u540d\u3002<\/p>\n\n\n\n<p><samp>String<\/samp><samp>String<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public static void method() {\nString Database = '';\nDatabase.insert(new Account());\n}<\/code><\/pre>\n\n\n\n<p><a><\/a>\u5185\u90e8\u7c7b\u7684\u884c\u4e3a\u7c7b\u4f3c\u4e8e\u9759\u6001 Java \u5185\u90e8\u7c7b\uff0c \u4f46\u4e0d\u9700\u8981\u5173\u952e\u5b57\u3002 \u5185\u90e8\u7c7b\u53ef\u4ee5\u50cf\u5916\u90e8\u7c7b\u4e00\u6837\u5177\u6709\u5b9e\u4f8b\u6210\u5458\u53d8\u91cf\uff0c\u4f46 \u6ca1\u6709\u6307\u5411\u5916\u90e8\u7c7b\u5b9e\u4f8b\u7684\u9690\u5f0f\u6307\u9488\uff08\u4f7f\u7528 \u5173\u952e\u5b57\uff09\u3002<samp>static<\/samp><samp>this<\/samp><\/p>\n\n\n\n<p>\u6ce8\u610f<\/p>\n\n\n\n<p>\u5728 API \u7248\u672c 20.0 \u53ca\u66f4\u65e9\u7248\u672c\u4e2d\uff0c\u5982\u679c\u6279\u91cf API \u8bf7\u6c42\u5bfc\u81f4\u89e6\u53d1\u5668\u89e6\u53d1\uff0c \u89e6\u53d1\u5668\u8981\u5904\u7406\u7684 200 \u6761\u8bb0\u5f55\u7684\u6bcf\u4e2a\u5757\u88ab\u62c6\u5206\u4e3a 100 \u6761\u8bb0\u5f55\u7684\u5757 \u8bb0\u5f55\u3002\u5728 Salesforce API \u7248\u672c 21.0 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u4e0d\u518d\u62c6\u5206 API \u533a\u5757 \u53d1\u751f\u3002\u5982\u679c\u6279\u91cf API \u8bf7\u6c42\u5bfc\u81f4\u89e6\u53d1\u5668\u591a\u6b21\u89e6\u53d1 200 \u6761\u8bb0\u5f55\uff0c\u8c03\u63a7\u5668\u9650\u5236\u5728\u8fd9\u4e9b\u89e6\u53d1\u5668\u8c03\u7528\u4e4b\u95f4\u91cd\u7f6e \u76f8\u540c\u7684 HTTP \u8bf7\u6c42\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u5b9e\u4f8b\u65b9\u6cd5\u548c\u53d8\u91cf<\/h2>\n\n\n\n<p>\u5b9e\u4f8b\u65b9\u6cd5\u548c\u6210\u5458\u53d8\u91cf\u7531\u7c7b\u7684\u5b9e\u4f8b\u4f7f\u7528\uff0c\u5373 \u4e00\u4e2a\u5bf9\u8c61\u3002\u5b9e\u4f8b\u6210\u5458\u53d8\u91cf\u5728\u7c7b\u4e2d\u58f0\u660e\uff0c\u4f46\u4e0d\u5728\u7c7b\u4e2d\u58f0\u660e \u65b9\u6cd5\u3002\u5b9e\u4f8b\u65b9\u6cd5\u901a\u5e38\u4f7f\u7528\u5b9e\u4f8b\u6210\u5458\u53d8\u91cf\u6765\u5f71\u54cd \u65b9\u6cd5\u7684\u884c\u4e3a\u3002<\/p>\n\n\n\n<p>\u5047\u8bbe\u60a8\u5e0c\u671b\u6709\u4e00\u4e2a\u6536\u96c6\u4e8c\u7ef4\u70b9\u548c\u7ed8\u56fe\u7684\u7c7b \u5b83\u4eec\u5728\u56fe\u8868\u4e0a\u3002\u4e0b\u9762\u7684\u6846\u67b6\u7c7b\u4f7f\u7528\u6210\u5458\u53d8\u91cf\u6765\u4fdd\u5b58\u5217\u8868 \u7684\u70b9\u548c\u4e00\u4e2a\u5185\u90e8\u7c7b\u6765\u7ba1\u7406\u4e8c\u7ef4\u70b9\u5217\u8868\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Plotter {\n\n    \/\/ This inner class manages the points\n    class Point {\n        Double x;\n        Double y;\n\n        Point(Double x, Double y) {\n             this.x = x;\n             this.y = y;\n        }\n        Double getXCoordinate() {\n             return x;\n        }\n\n        Double getYCoordinate() {\n             return y;\n        }\n    }\n\n    List&lt;Point&gt; points = new List&lt;Point&gt;();\n\n    public void plot(Double x, Double y) {\n        points.add(new Point(x, y));\n    }\n    \n    \/\/ The following method takes the list of points and does something with them\n    public void render() {\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u521d\u59cb\u5316\u4ee3\u7801<\/h2>\n\n\n\n<p>\u5b9e\u4f8b\u521d\u59cb\u5316\u4ee3\u7801\u662f\u5b9a\u4e49\u4ee5\u4e0b\u5f62\u5f0f\u7684\u4ee3\u7801\u5757 \u5728\u8bfe\u5802\u4e0a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{ \n\n   \/\/code body\n\n}<\/code><\/pre>\n\n\n\n<p>\u6bcf\u6b21\u5bf9\u8c61\u6267\u884c\u65f6\uff0c\u90fd\u4f1a\u6267\u884c\u7c7b\u4e2d\u7684\u5b9e\u4f8b\u521d\u59cb\u5316\u4ee3\u7801 \u4ece\u8be5\u7c7b\u5b9e\u4f8b\u5316\u3002\u8fd9\u4e9b\u4ee3\u7801\u5757\u5728\u6784\u9020\u51fd\u6570\u4e4b\u524d\u8fd0\u884c\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u4e0d\u60f3\u4e3a\u7c7b\u7f16\u5199\u81ea\u5df1\u7684\u6784\u9020\u51fd\u6570\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b9e\u4f8b \u521d\u59cb\u5316\u4ee3\u7801\u5757\uff0c\u7528\u4e8e\u521d\u59cb\u5316\u5b9e\u4f8b\u53d8\u91cf\u3002\u5728\u7b80\u5355\u7684\u60c5\u51b5\u4e0b\uff0c \u4f7f\u7528\u666e\u901a\u7684\u521d\u59cb\u503c\u8bbe\u5b9a\u9879\u3002\u4e3a\u590d\u6742\u60c5\u51b5\u4fdd\u7559\u521d\u59cb\u5316\u4ee3\u7801\uff0c \u4f8b\u5982\u521d\u59cb\u5316\u9759\u6001\u6620\u5c04\u3002\u9759\u6001\u521d\u59cb\u5316\u5757\u53ea\u8fd0\u884c\u4e00\u6b21\uff0c \u4e0d\u7ba1\u60a8\u8bbf\u95ee\u5305\u542b\u5b83\u7684\u7c7b\u591a\u5c11\u6b21\u3002<\/p>\n\n\n\n<p>\u9759\u6001\u521d\u59cb\u5316\u4ee3\u7801\u662f\u4ee5\u5173\u952e\u5b57 \u5f00\u5934\u7684\u4ee3\u7801\u5757\u3002<samp>static<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>static {\n\n   \/\/code body\n\n}<\/code><\/pre>\n\n\n\n<p>\u4e0e\u5176\u4ed6\u9759\u6001\u4ee3\u7801\u7c7b\u4f3c\uff0c\u9759\u6001\u521d\u59cb\u5316\u4ee3\u7801\u5757\u4ec5\u521d\u59cb\u5316 \u7b2c\u4e00\u6b21\u4f7f\u7528\u7c7b\u65f6\u4e00\u6b21\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5177\u6709\u4efb\u610f\u6570\u91cf\u7684\u9759\u6001\u6216\u5b9e\u4f8b\u521d\u59cb\u5316\u4ee3\u7801\u5757\u3002 \u5b83\u4eec\u53ef\u4ee5\u51fa\u73b0\u5728\u4ee3\u7801\u6b63\u6587\u4e2d\u7684\u4efb\u4f55\u4f4d\u7f6e\u3002\u4ee3\u7801\u5757\u6309\u4ee5\u4e0b\u987a\u5e8f\u6267\u884c \u5b83\u4eec\u51fa\u73b0\u5728\u6587\u4ef6\u4e2d\uff0c\u5c31\u50cf\u5b83\u4eec\u5728 Java \u4e2d\u4e00\u6837\u3002<\/p>\n\n\n\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u9759\u6001\u521d\u59cb\u5316\u4ee3\u7801\u6765\u521d\u59cb\u5316\u9759\u6001\u6700\u7ec8\u53d8\u91cf\uff0c\u5e76 \u58f0\u660e\u9759\u6001\u4fe1\u606f\uff0c\u4f8b\u5982\u503c\u6620\u5c04\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class MyClass {\n \n    class RGB {\n\n        Integer red;\n        Integer green;\n        Integer blue;\n\n        RGB(Integer red, Integer green, Integer blue) {\n            this.red = red;\n            this.green = green;\n            this.blue = blue;\n        }\n     }\n\n   static Map&lt;String, RGB&gt; colorMap = new Map&lt;String, RGB&gt;();\n\n    static {\n        colorMap.put('red', new RGB(255, 0, 0));\n        colorMap.put('cyan', new RGB(0, 255, 255));\n        colorMap.put('magenta', new RGB(255, 0, 255));\n    }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u7248\u672c\u5316\u884c\u4e3a\u66f4\u6539<\/h2>\n\n\n\n<p>\u5728 API \u7248\u672c 50.0 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u8303\u56f4\u548c\u53ef\u8bbf\u95ee\u6027\u89c4\u5219\u5728 Apex \u4e0a\u5f3a\u5236\u6267\u884c \u7528 \u6ce8\u91ca\u7684\u53d8\u91cf\u3001\u65b9\u6cd5\u3001\u5185\u90e8\u7c7b\u548c\u63a5\u53e3\u3002\u5bf9\u4e8e\u53ef\u8bbf\u95ee\u6027 \u6ce8\u610f\u4e8b\u9879\uff0c\u8bf7\u53c2\u9605\u00a0NamespaceAccessible \u6ce8\u91ca\u3002\u6709\u5173\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027 \u9002\u7528\u4e8e\u7b2c\u4e8c\u4ee3\u8f6f\u4ef6\u5305\u4e2d\u7684 Apex \u7c7b\u3002<samp>@namespaceAccessible<\/samp><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Apex \u5c5e\u6027<\/h2>\n\n\n\n<p><a><\/a>Apex&nbsp;<dfn>\u5c5e\u6027<\/dfn>\u7c7b\u4f3c\u4e8e\u53d8\u91cf; \u4f46\u662f\uff0c\u60a8\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u5bf9\u5c5e\u6027\u503c\u6267\u884c\u5176\u4ed6\u64cd\u4f5c\uff0c\u7136\u540e\u518d\u5c06\u5176 \u8bbf\u95ee\u6216\u8fd4\u56de\u3002\u5c5e\u6027\u53ef\u7528\u4e8e\u5728\u66f4\u6539\u4e4b\u524d\u9a8c\u8bc1\u6570\u636e made\uff0c\u7528\u4e8e\u5728\u6570\u636e\u53d1\u751f\u66f4\u6539\u65f6\u63d0\u793a\u64cd\u4f5c\uff08\u4f8b\u5982\u66f4\u6539\u5176\u4ed6\u503c \u6210\u5458\u53d8\u91cf\uff09\uff0c\u6216\u516c\u5f00\u4ece\u5176\u4ed6\u6e90\u68c0\u7d22\u5230\u7684\u6570\u636e\uff08\u4f8b\u5982 \u4f5c\u4e3a\u53e6\u4e00\u4e2a\u7c7b\uff09\u3002\u5c5e\u6027\u5b9a\u4e49\u5305\u62ec\u4e00\u4e2a\u6216\u4e24\u4e2a\u4ee3\u7801\u5757\uff0c\u8868\u793a&nbsp;<dfn>get \u8bbf\u95ee\u5668<\/dfn>\u548c&nbsp;<dfn>SET \u8bbf\u95ee\u5668<\/dfn>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>get \u8bbf\u95ee\u5668\u4e2d\u7684\u4ee3\u7801\u5728\u8bfb\u53d6\u5c5e\u6027\u65f6\u6267\u884c\u3002<\/li>\n\n\n\n<li>\u5f53\u4e3a\u5c5e\u6027\u5206\u914d\u65b0\u503c\u65f6\uff0c\u5c06\u6267\u884c set \u8bbf\u95ee\u5668\u4e2d\u7684\u4ee3\u7801\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5982\u679c\u5c5e\u6027\u53ea\u6709 get \u8bbf\u95ee\u5668\uff0c\u5219\u5c06\u5176\u89c6\u4e3a\u53ea\u8bfb\u3002\u5982\u679c\u5c5e\u6027\u53ea\u6709 set \u8bbf\u95ee\u5668\uff0c\u5219\u5c06\u5176\u89c6\u4e3a\u53ea\u5199\u3002\u8003\u8651\u5177\u6709\u4e24\u4e2a\u8bbf\u95ee\u5668\u7684\u5c5e\u6027 \u8bfb\u5199\u3002<\/p>\n\n\n\n<p>\u82e5\u8981\u58f0\u660e\u5c5e\u6027\uff0c\u8bf7\u5728\u7c7b\u7684\u4e3b\u4f53\u4e2d\u4f7f\u7528\u4ee5\u4e0b\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Public class BasicClass {\n\n   \/\/ Property declaration\n   <em>access_modifier<\/em><em> return_type property_name<\/em> {\n      get {\n         \/\/Get accessor code block\n      }\n      set {\n         \/\/Set accessor code block\n      }\n   } \n}<\/code><\/pre>\n\n\n\n<p>\u54ea\u91cc\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><var>access_modifier<\/var>\u662f\u5c5e\u6027\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u3002\u8fd9 \u53ef\u5e94\u7528\u4e8e\u5c5e\u6027\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u5305\u62ec\uff1a\u3001\u3001 \u548c \u3002\u6b64\u5916\uff0c\u8fd9\u4e9b\u5b9a\u4e49 \u53ef\u4ee5\u5e94\u7528\u4fee\u9970\u7b26\uff1a\u548c \u3002\u6709\u5173\u8bbf\u95ee\u7684\u66f4\u591a\u4fe1\u606f \u4fee\u9970\u7b26\uff0c\u8bf7\u53c2\u9605\u00a0Access \u4fee\u9970\u7b26\u3002<samp>publicprivateglobalprotectedstatictransient<\/samp><\/li>\n\n\n\n<li><var>return_type<\/var>\u662f\u5c5e\u6027\u7684\u7c7b\u578b\uff0c\u4f8b\u5982 Integer\u3001Double\u3001 sObject \u7b49\u3002\u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u6570\u636e\u7c7b\u578b\u3002<\/li>\n\n\n\n<li><var>property_name<\/var>\u662f\u5c5e\u6027\u7684\u540d\u79f0<\/li>\n<\/ul>\n\n\n\n<p>\u4f8b\u5982\uff0c\u4e0b\u9762\u7684\u7c7b\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a \u7684\u5c5e\u6027\u3002\u8be5\u7269\u4e1a\u662f\u516c\u5171\u7684\u3002\u8be5\u5c5e\u6027\u8fd4\u56de\u6574\u6570\u6570\u636e\u7c7b\u578b\u3002<samp>prop<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class BasicProperty {\n   public integer prop {\n      get { return prop; }\n      set { prop = value; }\n   }\n}<\/code><\/pre>\n\n\n\n<p>\u4e0b\u9762\u7684\u4ee3\u7801\u6bb5\u8c03\u7528 BasicProperty \u7c7b\uff0c\u6267\u884c get \u548c set \u8bbf\u95ee\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>BasicProperty bp = new BasicProperty();\nbp.prop = 5;                   \/\/ Calls set accessor\nSystem.assertEquals(5, bp.prop);   \/\/ Calls get accessor<\/code><\/pre>\n\n\n\n<p>\u8bf7\u6ce8\u610f\u4ee5\u4e0b\u4e8b\u9879\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>get \u8bbf\u95ee\u5668\u7684\u4e3b\u4f53\u7c7b\u4f3c\u4e8e\u65b9\u6cd5\u7684\u4e3b\u4f53\u3002\u5b83\u5fc5\u987b\u8fd4\u56de\u503c \u5c5e\u6027\u7c7b\u578b\u3002\u6267\u884c get \u8bbf\u95ee\u5668\u4e0e\u8bfb\u53d6 \u53d8\u91cf\u3002<\/li>\n\n\n\n<li>get \u8bbf\u95ee\u5668\u5fc5\u987b\u4ee5 return \u8bed\u53e5\u7ed3\u5c3e\u3002<\/li>\n\n\n\n<li>\u5efa\u8bae get \u8bbf\u95ee\u5668\u4e0d\u8981\u66f4\u6539\u5176\u5bf9\u8c61\u7684\u72b6\u6001 \u5b9a\u4e49\u4e0a\u3002<\/li>\n\n\n\n<li>set \u8bbf\u95ee\u5668\u7c7b\u4f3c\u4e8e\u8fd4\u56de\u7c7b\u578b\u4e3a void \u7684\u65b9\u6cd5\u3002<\/li>\n\n\n\n<li>\u4e3a\u5c5e\u6027\u8d4b\u503c\u65f6\uff0c\u5c06\u4f7f\u7528\u53c2\u6570\u8c03\u7528 set \u8bbf\u95ee\u5668 \u8fd9\u63d0\u4f9b\u4e86\u65b0\u7684\u4ef7\u503c\u3002<\/li>\n\n\n\n<li>\u5728 API \u7248\u672c 42.0 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u9664\u975e\u5728 set \u8bbf\u95ee\u5668\u4e2d\u8bbe\u7f6e\u4e86\u53d8\u91cf\u503c\uff0c\u5426\u5219 \u65e0\u6cd5\u5728 GET \u8bbf\u95ee\u5668\u4e2d\u66f4\u65b0\u5176\u503c\u3002<\/li>\n\n\n\n<li>\u8c03\u7528 set \u8bbf\u95ee\u5668\u65f6\uff0c\u7cfb\u7edf\u4f1a\u5c06\u9690\u5f0f\u53c2\u6570\u4f20\u9012\u7ed9 setter \u8c03\u7528\u7684\u6570\u636e\u7c7b\u578b\u4e0e \u8d22\u4ea7\u3002<samp>value<\/samp><\/li>\n\n\n\n<li>\u4e0d\u80fd\u5728<samp>\u63a5\u53e3<\/samp>\u4e0a\u5b9a\u4e49\u5c5e\u6027\u3002<\/li>\n\n\n\n<li>Apex \u5c5e\u6027\u57fa\u4e8e C# \u4e2d\u7684\u5bf9\u5e94\u5c5e\u6027\uff0c\u4f46\u5b58\u5728\u4ee5\u4e0b\u5dee\u5f02\uff1a\n<ul class=\"wp-block-list\">\n<li>\u5c5e\u6027\u76f4\u63a5\u4e3a\u503c\u63d0\u4f9b\u5b58\u50a8\u3002\u60a8\u65e0\u9700\u521b\u5efa \u652f\u6301\u7528\u4e8e\u5b58\u50a8\u503c\u7684\u6210\u5458\u3002<\/li>\n\n\n\n<li>\u53ef\u4ee5\u5728 Apex \u4e2d\u521b\u5efa\u81ea\u52a8\u5c5e\u6027\u3002\u6709\u5173\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u4f7f\u7528\u81ea\u52a8\u5c5e\u6027\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><a><\/a>\u4f7f\u7528\u81ea\u52a8\u5c5e\u6027<\/h2>\n\n\n\n<p>\u5c5e\u6027\u4e0d\u9700\u8981\u5728\u5176 get \u6216 set \u8bbf\u95ee\u5668\u4ee3\u7801\u5757\u4e2d\u4f7f\u7528\u5176\u4ed6\u4ee3\u7801\u3002 \u76f8\u53cd\uff0c\u60a8\u53ef\u4ee5\u5c06 get \u548c set \u8bbf\u95ee\u5668\u4ee3\u7801\u5757\u7559\u7a7a\u4ee5\u5b9a\u4e49<dfn>\u81ea\u52a8\u5c5e\u6027<\/dfn>\u3002\u81ea\u52a8\u5c5e\u6027\u5141\u8bb8\u60a8\u7f16\u5199\u66f4\u591a\u5185\u5bb9 \u7d27\u51d1\u7684\u4ee3\u7801\uff0c\u66f4\u6613\u4e8e\u8c03\u8bd5\u548c\u7ef4\u62a4\u3002\u5b83\u4eec\u53ef\u4ee5\u58f0\u660e\u4e3a \u53ea\u8bfb\u3001\u8bfb\u5199\u6216\u53ea\u5199\u3002\u4ee5\u4e0b\u793a\u4f8b\u521b\u5efa\u4e09\u4e2a\u81ea\u52a8 \u6027\u80fd\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class AutomaticProperty {\n   public integer MyReadOnlyProp { get; }\n   public double MyReadWriteProp { get; set; }\n   public string MyWriteOnlyProp { set; }\n}<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0b\u4ee3\u7801\u6bb5\u7ec3\u4e60\u8fd9\u4e9b\u5c5e\u6027\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>AutomaticProperty ap = new AutomaticProperty();\nap.MyReadOnlyProp = 5;                 \/\/ This produces a compile error: not writable\nap.MyReadWriteProp = 5;                \/\/ No error\nSystem.assertEquals(5, ap.MyWriteOnlyProp);   \/\/ This produces a compile error: not readable<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><a><\/a>\u4f7f\u7528\u9759\u6001\u5c5e\u6027<\/h2>\n\n\n\n<p>\u5f53\u5c5e\u6027\u58f0\u660e\u4e3a \u65f6\uff0c \u5c5e\u6027\u7684\u8bbf\u95ee\u5668\u65b9\u6cd5\u5728\u9759\u6001\u4e0a\u4e0b\u6587\u4e2d\u6267\u884c\u3002\u56e0\u6b64\uff0c\u8bbf\u95ee\u5668\u4e0d\u4f1a \u6709\u6743\u8bbf\u95ee\u7c7b\u4e2d\u5b9a\u4e49\u7684\u975e\u9759\u6001\u6210\u5458\u53d8\u91cf\u3002\u4ee5\u4e0b \u793a\u4f8b\u521b\u5efa\u4e00\u4e2a\u540c\u65f6\u5177\u6709\u9759\u6001\u5c5e\u6027\u548c\u5b9e\u4f8b\u5c5e\u6027\u7684\u7c7b\uff1a<samp>static<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class StaticProperty {\n   private static integer StaticMember;\n   private integer NonStaticMember;\n\n   \/\/ The following produces a system error\n   \/\/ public static integer MyBadStaticProp { return NonStaticMember; }\n\n   public static integer MyGoodStaticProp { \n     get {return StaticMember;} \n     set { StaticMember = value; } \n   }  \n   public integer MyGoodNonStaticProp { \n     get {return NonStaticMember;} \n     set { NonStaticMember = value; } \n   } \n}<\/code><\/pre>\n\n\n\n<p>\u4ee5\u4e0b\u4ee3\u7801\u6bb5\u8c03\u7528\u9759\u6001\u5c5e\u6027\u548c\u5b9e\u4f8b\u5c5e\u6027\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>StaticProperty sp = new StaticProperty();\n\/\/ The following produces a system error: a static variable cannot be\n\/\/ accessed through an object instance\n\/\/ sp.MyGoodStaticProp = 5;\n\n\/\/ The following does not produce an error\nStaticProperty.MyGoodStaticProp = 5;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><a><\/a>\u5728\u5c5e\u6027\u4e0a\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26 \u8bbf\u95ee<\/h2>\n\n\n\n<p>\u53ef\u4ee5\u4f7f\u7528\u81ea\u5df1\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u5b9a\u4e49\u5c5e\u6027\u8bbf\u95ee\u5668\u3002\u5982\u679c\u8bbf\u95ee\u5668 \u5305\u542b\u5b83\u81ea\u5df1\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u8fd9\u4e2a\u4fee\u9970\u7b26\u8986\u76d6\u4e86 \u8d22\u4ea7\u3002\u5355\u4e2a\u8bbf\u95ee\u5668\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u5fc5\u987b\u66f4\u5177\u9650\u5236\u6027 \u800c\u4e0d\u662f\u5c5e\u6027\u672c\u8eab\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5c5e\u6027\u5177\u6709 \u88ab\u5b9a\u4e49\u4e3a \uff0c\u4e2a\u4eba \u8bbf\u95ee\u5668\u4e0d\u80fd\u5b9a\u4e49\u4e3a \u3002\u8fd9 \u4ee5\u4e0b\u7c7b\u5b9a\u4e49\u663e\u793a\u4e86\u5176\u4ed6\u793a\u4f8b\uff1a<samp>public<\/samp><samp>global<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>global virtual class PropertyVisibility {\n   \/\/ X is private for read and public for write\n   public integer X { private get; set; }\n   \/\/ Y can be globally read but only written within a class\n   global integer Y { get; public set; }\n   \/\/ Z can be read within the class but only subclasses can set it\n   public integer Z { get; protected set; }\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u6269\u5c55\u7c7b<\/h2>\n\n\n\n<p>\u60a8\u53ef\u4ee5\u6269\u5c55\u7c7b\u4ee5\u63d0\u4f9b\u66f4\u4e13\u4e1a\u7684\u884c\u4e3a\u3002<\/p>\n\n\n\n<p>\u6269\u5c55\u53e6\u4e00\u4e2a\u7c7b\u7684\u7c7b\u7ee7\u627f\u4e86 \u6269\u5c55\u7c7b\u3002\u6b64\u5916\uff0c\u6269\u5c55\u7c7b\u53ef\u4ee5\u8986\u76d6\u73b0\u6709\u7684\u865a\u62df\u7c7b \u65b9\u6cd5\uff0c\u65b9\u6cd5\u662f\u5728\u65b9\u6cd5\u5b9a\u4e49\u4e2d\u4f7f\u7528 override \u5173\u952e\u5b57\u3002\u8986\u76d6\u865a\u62df \u65b9\u6cd5\u5141\u8bb8\u60a8\u4e3a\u73b0\u6709\u65b9\u6cd5\u63d0\u4f9b\u4e0d\u540c\u7684\u5b9e\u73b0\u3002\u8fd9 \u8868\u793a\u7279\u5b9a\u65b9\u6cd5\u7684\u884c\u4e3a\u56e0\u5bf9\u8c61\u800c\u5f02 \u4f60\u6b63\u5728\u53ec\u5524\u5b83\u3002\u8fd9\u79f0\u4e3a\u591a\u6001\u6027\u3002<\/p>\n\n\n\n<p>\u4e00\u4e2a\u7c7b\u4f7f\u7528\u7c7b\u5b9a\u4e49\u4e2d\u7684\u5173\u952e\u5b57\u6269\u5c55\u53e6\u4e00\u4e2a\u7c7b\u3002\u4e00\u4e2a\u7c7b\u53ea\u80fd\u6269\u5c55\u53e6\u4e00\u4e2a\u7c7b\uff0c\u4f46\u5b83\u53ef\u4ee5 \u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\u3002<samp>extends<\/samp><\/p>\n\n\n\n<p>\u6b64\u793a\u4f8b\u6f14\u793a\u7c7b\u5982\u4f55 \u6269\u5c55\u7c7b\u3002\u8fd0\u884c\u7ee7\u627f \u793a\u4f8b \u5728\u672c\u8282\u4e2d\uff0c\u9996\u5148\u521b\u5efa\u7c7b\u3002<samp>YellowMarker<\/samp><samp>Marker<\/samp><samp>Marker<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public virtual class Marker {\n    public virtual void write() {\n        System.debug('Writing some text.');\n    }\n\n    public virtual Double discount() {\n        return .05;\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u7136\u540e\u521b\u5efa\u7c7b\uff0c\u8be5\u7c7b\u6269\u5c55 \u7c7b\u3002<samp>YellowMarker<\/samp><samp>Marker<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Extension for the Marker class\npublic class YellowMarker extends Marker {\n    public override void write() {\n        System.debug('Writing some text using the yellow marker.');\n    } \n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u4ee3\u7801\u6bb5\u663e\u793a\u591a\u6001\u6027\u3002\u8be5\u793a\u4f8b\u58f0\u660e\u4e24\u4e2a\u76f8\u540c\u7c7b\u578b\u7684\u5bf9\u8c61 ().\u5373\u4f7f\u4e24\u4e2a\u5bf9\u8c61\u90fd\u662f \u6807\u8bb0\uff0c\u5219\u5c06\u7b2c\u4e8c\u4e2a\u5bf9\u8c61\u5206\u914d\u7ed9\u7c7b\u7684\u5b9e\u4f8b\u3002\u56e0\u6b64\uff0c\u5728\u5176\u4e0a\u8c03\u7528\u8be5\u65b9\u6cd5\u4f1a\u4ea7\u751f\u4e0e \u5728\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u4e0a\u8c03\u7528\u6b64\u65b9\u6cd5\uff0c\u56e0\u4e3a\u6b64\u65b9\u6cd5\u5df2\u88ab\u91cd\u5199\u3002 \u4f46\u662f\uff0c\u60a8\u53ef\u4ee5\u5728 \u7b2c\u4e8c\u4e2a\u5bf9\u8c61\uff0c\u5373\u4f7f\u6b64\u65b9\u6cd5\u4e0d\u662f\u7c7b\u5b9a\u4e49\u7684\u4e00\u90e8\u5206\u3002\u4f46\u5b83\u662f\u6269\u5c55\u7c7b\u7684\u4e00\u90e8\u5206\uff0c\u5e76\u4e14 \u56e0\u6b64\uff0c\u53ef\u7528\u4e8e\u6269\u5c55\u7c7b .\u5728 Execute Anonymous \u7a97\u53e3\u4e2d\u8fd0\u884c\u6b64\u4ee3\u7801\u6bb5 \u5f00\u53d1 \u4eba\u5458 \u5b89\u6170\u3002<\/p>\n\n\n\n<p><samp>Marker<\/samp><samp>YellowMarker<\/samp><samp>write<\/samp><samp>discount<\/samp><samp>YellowMarker<\/samp><samp>YellowMarker<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Marker obj1, obj2;\nobj1 = new Marker();\n\/\/ This outputs 'Writing some text.'\nobj1.write();\n\nobj2 = new YellowMarker();\n\/\/ This outputs 'Writing some text using the yellow marker.'\nobj2.write();\n\/\/ We get the discount method for free\n\/\/ and can call it from the YellowMarker instance.\nDouble d = obj2.discount();<\/code><\/pre>\n\n\n\n<p>\u6269\u5c55\u7c7b\u53ef\u4ee5\u5177\u6709\u66f4\u591a\u4e0e\u539f\u59cb\u7c7b\u4e0d\u5e38\u89c1\u7684\u65b9\u6cd5\u5b9a\u4e49 \u6269\u5c55\u7c7b\u3002\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u8be5\u7c7b\u6269\u5c55\u4e86\u8be5\u7c7b\uff0c\u5e76\u5177\u6709\u4e00\u4e2a\u989d\u5916\u7684\u7c7b \u65b9\u6cd5\uff0c\u4e0d\u9002\u7528\u4e8e \u7c7b\u3002\u8981\u8c03\u7528\u989d\u5916\u7684\u65b9\u6cd5\uff0c\u8bf7 \u5bf9\u8c61\u7c7b\u578b\u5fc5\u987b\u662f\u6269\u5c55\u7c7b\u3002<samp>RedMarker<\/samp><samp>Marker<\/samp><samp>computePrice<\/samp><samp>Marker<\/samp><\/p>\n\n\n\n<p>\u5728\u8fd0\u884c\u4e0b\u4e00\u4e2a\u4ee3\u7801\u6bb5\u4e4b\u524d\uff0c\u8bf7\u521b\u5efa\u8be5\u7c7b\uff0c\u8fd9\u9700\u8981\u7ec4\u7ec7\u4e2d\u7684\u7c7b\u3002<samp>RedMarker<\/samp><samp>Marker<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Extension for the Marker class\npublic class RedMarker extends Marker {\n    public override void write() {\n        System.debug('Writing some text in red.');\n    } \n\n    \/\/ Method only in this class\n    public Double computePrice() {\n        return 1.5;\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u4ee3\u7801\u7247\u6bb5\u6f14\u793a\u5982\u4f55\u5bf9\u7c7b\u8c03\u7528\u5176\u4ed6\u65b9\u6cd5\u3002\u5728\u201c\u6267\u884c\u201d\u4e2d\u8fd0\u884c\u6b64\u4ee3\u7801\u7247\u6bb5 \u5f00\u53d1\u8005\u63a7\u5236\u53f0\u7684\u533f\u540d\u7a97\u53e3\u3002<samp>RedMarker<\/samp><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>RedMarker obj = new RedMarker();\n\/\/ Call method specific to RedMarker only\nDouble price = obj.computePrice();<\/code><\/pre>\n\n\n\n<p>\u6269\u5c55\u4e5f\u9002\u7528\u4e8e\u63a5\u53e3 &#8211; \u4e00\u4e2a\u63a5\u53e3\u53ef\u4ee5\u6269\u5c55\u53e6\u4e00\u4e2a\u63a5\u53e3\u3002\u5982 \u4f7f\u7528\u7c7b\uff0c\u5f53\u4e00\u4e2a\u63a5\u53e3\u6269\u5c55\u53e6\u4e00\u4e2a\u63a5\u53e3\u65f6\uff0c\u6240\u6709\u65b9\u6cd5\u548c \u6269\u5c55\u63a5\u53e3\u7684\u5c5e\u6027\u53ef\u7528\u4e8e\u6269\u5c55\u63a5\u53e3\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7248\u672c\u5316\u884c\u4e3a\u66f4\u6539<\/h2>\n\n\n\n<p>\u5728 API \u7248\u672c 50.0 \u53ca\u66f4\u9ad8\u7248\u672c\u4e2d\uff0c\u8303\u56f4\u548c\u53ef\u8bbf\u95ee\u6027\u89c4\u5219\u5728 Apex \u4e0a\u5f3a\u5236\u6267\u884c \u7528 \u6ce8\u91ca\u7684\u53d8\u91cf\u3001\u65b9\u6cd5\u3001\u5185\u90e8\u7c7b\u548c\u63a5\u53e3\u3002\u5bf9\u4e8e\u53ef\u8bbf\u95ee\u6027 \u6ce8\u610f\u4e8b\u9879\uff0c\u8bf7\u53c2\u9605\u00a0NamespaceAccessible \u6ce8\u91ca\u3002\u6709\u5173\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027\u7684\u8be6\u7ec6\u4fe1\u606f\uff0c\u8bf7\u53c2\u9605\u57fa\u4e8e\u547d\u540d\u7a7a\u95f4\u7684\u53ef\u89c1\u6027 \u9002\u7528\u4e8e\u7b2c\u4e8c\u4ee3\u8f6f\u4ef6\u5305\u4e2d\u7684 Apex \u7c7b\u3002<samp>@namespaceAccessible<\/samp><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6269\u5c55\u7c7b\u793a\u4f8b<\/h2>\n\n\n\n<p>\u4e0b\u9762\u662f\u4e00\u4e2a\u7c7b\u7684\u6269\u5c55\u793a\u4f8b\uff0c\u663e\u793a\u4e86\u6240\u6709 Apex \u7c7b\u7684\u529f\u80fd\u3002\u793a\u4f8b\u4e2d\u4ecb\u7ecd\u7684\u5173\u952e\u5b57\u548c\u6982\u5ff5\u662f \u5728\u672c\u7ae0\u4e2d\u8fdb\u884c\u4e86\u66f4\u8be6\u7ec6\u7684\u89e3\u91ca\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Top-level (outer) class must be public or global (usually public unless they contain\n\/\/ a Web Service, then they must be global)\npublic class OuterClass {\n\n  \/\/ Static final variable (constant) \u2013 outer class level only\n  private static final Integer MY_INT;\n\n  \/\/ Non-final static variable - use this to communicate state across triggers\n  \/\/ within a single request)\n  public static String sharedState;\n  \n  \/\/ Static method - outer class level only\n  public static Integer getInt() { return MY_INT; }\n\n  \/\/ Static initialization (can be included where the variable is defined)\n  static {\n    MY_INT = 2; \n  }\n\n  \/\/ Member variable for outer class\n  private final String m;\n\n  \/\/ Instance initialization block - can be done where the variable is declared, \n  \/\/ or in a constructor\n  {\n    m = 'a';  \n  }\n  \n  \/\/ Because no constructor is explicitly defined in this outer class, an implicit, \n  \/\/ no-argument, public constructor exists\n\n  \/\/ Inner interface\n  public virtual interface MyInterface { \n\n    \/\/ No access modifier is necessary for interface methods - these are always \n    \/\/ public or global depending on the interface visibility\n    void myMethod(); \n  }\n\n  \/\/ Interface extension\n  interface MySecondInterface extends MyInterface { \n    Integer method2(Integer i); \n  }\n\n  \/\/ Inner class - because it is virtual it can be extended.\n  \/\/ This class implements an interface that, in turn, extends another interface.\n  \/\/ Consequently the class must implement all methods.\n  public virtual class InnerClass implements MySecondInterface {\n\n    \/\/ Inner member variables\n    private final String s;\n    private final String s2;\n\n    \/\/ Inner instance initialization block (this code could be located above)\n    {\n       this.s = 'x';\n    }\n\n    \/\/ Inline initialization (happens after the block above executes)\n    private final Integer i = s.length();\n \n    \/\/ Explicit no argument constructor\n    InnerClass() {\n       \/\/ This invokes another constructor that is defined later\n       this('none');\n    }\n\n    \/\/ Constructor that assigns a final variable value\n    public InnerClass(String s2) { \n      this.s2 = s2; \n    }\n\n    \/\/ Instance method that implements a method from MyInterface.\n    \/\/ Because it is declared virtual it can be overridden by a subclass.\n    public virtual void myMethod() { \/* does nothing *\/ }\n\n    \/\/ Implementation of the second interface method above.\n    \/\/ This method references member variables (with and without the \"this\" prefix)\n    public Integer method2(Integer i) { return this.i + s.length(); }\n  }\n\n  \/\/ Abstract class (that subclasses the class above). No constructor is needed since\n  \/\/ parent class has a no-argument constructor\n  public abstract class AbstractChildClass extends InnerClass {\n\n    \/\/ Override the parent class method with this signature.\n    \/\/ Must use the override keyword\n    public override void myMethod() { \/* do something else *\/ }\n\n    \/\/ Same name as parent class method, but different signature.\n    \/\/ This is a different method (displaying polymorphism) so it does not need\n    \/\/ to use the override keyword\n    protected void method2() {}\n\n    \/\/ Abstract method - subclasses of this class must implement this method\n    abstract Integer abstractMethod();\n  }\n\n  \/\/ Complete the abstract class by implementing its abstract method\n  public class ConcreteChildClass extends AbstractChildClass {\n    \/\/ Here we expand the visibility of the parent method - note that visibility \n    \/\/ cannot be restricted by a sub-class\n    public override Integer abstractMethod() { return 5; }\n  }\n\n  \/\/ A second sub-class of the original InnerClass\n  public class AnotherChildClass extends InnerClass {\n    AnotherChildClass(String s) {\n      \/\/ Explicitly invoke a different super constructor than one with no arguments\n      super(s);\n    }\n  }\n  \n  \/\/ Exception inner class\n  public virtual class MyException extends Exception {\n    \/\/ Exception class member variable\n    public Double d;\n\n    \/\/ Exception class constructor    \n    MyException(Double d) {\n      this.d = d;\n    }\n    \n    \/\/ Exception class method, marked as protected\n    protected void doIt() {}\n  }\n  \n  \/\/ Exception classes can be abstract and implement interfaces\n  public abstract class MySecondException extends Exception implements MyInterface {\n  }\n}<\/code><\/pre>\n\n\n\n<p>\u6b64\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9876\u7ea7\u7c7b\u5b9a\u4e49\uff08\u4e5f\u79f0\u4e3a<dfn>\u5916\u90e8\u7c7b<\/dfn>)<\/li>\n\n\n\n<li>\u9876\u7ea7\u7c7b\u4e2d\u7684\u9759\u6001\u53d8\u91cf\u548c\u9759\u6001\u65b9\u6cd5\uff0c\u4f5c\u4e3a \u4ee5\u53ca\u9759\u6001\u521d\u59cb\u5316\u4ee3\u7801\u5757<\/li>\n\n\n\n<li>\u9876\u7ea7\u7c7b\u7684\u6210\u5458\u53d8\u91cf\u548c\u65b9\u6cd5<\/li>\n\n\n\n<li>\u6ca1\u6709\u7528\u6237\u5b9a\u4e49\u6784\u9020\u51fd\u6570\u7684\u7c7b \u2014 \u8fd9\u4e9b\u7c7b\u5177\u6709 \u9690\u5f0f\u3001\u65e0\u53c2\u6570\u6784\u9020\u51fd\u6570<\/li>\n\n\n\n<li>\u9876\u7ea7\u7c7b\u4e2d\u7684\u63a5\u53e3\u5b9a\u4e49<\/li>\n\n\n\n<li>\u6269\u5c55\u53e6\u4e00\u4e2a\u63a5\u53e3\u7684\u63a5\u53e3<\/li>\n\n\n\n<li>\u9876\u7ea7\u7c7b\u4e2d\u7684\u5185\u90e8\u7c7b\u5b9a\u4e49\uff08\u4e00\u7ea7\u6df1\u5ea6\uff09<\/li>\n\n\n\n<li>\u5b9e\u73b0\u63a5\u53e3\uff08\u56e0\u6b64\uff0c\u5176\u5173\u8054\u7684\u63a5\u53e3\uff09\u7684\u7c7b \u5b50\u63a5\u53e3\uff09\u6765\u5b9e\u73b0\u65b9\u6cd5\u7b7e\u540d\u7684\u516c\u5171\u7248\u672c<\/li>\n\n\n\n<li>\u5185\u90e8\u7c7b\u6784\u9020\u51fd\u6570\u5b9a\u4e49\u548c\u8c03\u7528<\/li>\n\n\n\n<li>\u5185\u90e8\u7c7b\u6210\u5458\u53d8\u91cf\u4ee5\u53ca\u4f7f\u7528\u5173\u952e\u5b57\u5bf9\u5b83\u7684\u5f15\u7528\uff08\u4e0d\u5e26\u53c2\u6570\uff09<samp>this<\/samp><\/li>\n\n\n\n<li>\u4e00\u4e2a\u5185\u90e8\u7c7b\u6784\u9020\u51fd\u6570\uff0c\u5b83\u4f7f\u7528\u5173\u952e\u5b57\uff08\u5e26\u53c2\u6570\uff09\u6765 \u8c03\u7528\u5176\u4ed6\u6784\u9020\u51fd\u6570<samp>this<\/samp><\/li>\n\n\n\n<li>\u6784\u9020\u51fd\u6570\u4e4b\u5916\u7684\u521d\u59cb\u5316\u4ee3\u7801 \u2014 \u5176\u4e2d \u5b9a\u4e49\u53d8\u91cf\uff0c\u4ee5\u53ca\u5927\u62ec\u53f7\u4e2d\u7684\u533f\u540d\u5757 ().\u8bf7\u6ce8\u610f\uff0c\u8fd9\u4e9b\u6267\u884c \u6bcf\u4e2a\u6784\u9020\u90fd\u6309\u7167\u5b83\u4eec\u5728\u6587\u4ef6\u4e2d\u51fa\u73b0\u7684\u987a\u5e8f\u51fa\u73b0\uff0c\u5982 \u722a\u54c7\u5c9b\u3002<samp>{}<\/samp><\/li>\n\n\n\n<li>\u7c7b\u6269\u5c55\u548c\u62bd\u8c61\u7c7b<\/li>\n\n\n\n<li>\u91cd\u5199\u57fa\u7c7b\u65b9\u6cd5\uff08\u5fc5\u987b\u58f0\u660e\uff09\u7684\u65b9\u6cd5<samp>virtual<\/samp>)<\/li>\n\n\n\n<li>\u5173\u952e\u5b57 \u5bf9\u4e8e\u91cd\u5199\u5b50\u7c7b\u65b9\u6cd5\u7684\u65b9\u6cd5<samp>override<\/samp><\/li>\n\n\n\n<li>\u62bd\u8c61\u65b9\u6cd5\u53ca\u5176\u901a\u8fc7\u5177\u4f53\u5b50\u7c7b\u7684\u5b9e\u73b0<\/li>\n\n\n\n<li>\u4ea4\u901a \u4fee\u9970\u8bed<samp>protected<\/samp><\/li>\n\n\n\n<li>\u4f5c\u4e3a\u5177\u6709\u6210\u5458\u3001\u65b9\u6cd5\u548c\u6784\u9020\u51fd\u6570\u7684\u7b2c\u4e00\u7c7b\u5bf9\u8c61\u7684\u5f02\u5e38<\/li>\n<\/ul>\n\n\n\n<p>\u6b64\u793a\u4f8b\u6f14\u793a\u5176\u4ed6 Apex \u4ee3\u7801\u5982\u4f55\u8c03\u7528\u4e0a\u8ff0\u7c7b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Construct an instance of an inner concrete class, with a user-defined constructor\nOuterClass.InnerClass ic = new OuterClass.InnerClass('x');\n\n\/\/ Call user-defined methods in the class\nSystem.assertEquals(2, ic.method2(1));\n\n\/\/ Define a variable with an interface data type, and assign it a value that is of \n\/\/ a type that implements that interface\nOuterClass.MyInterface mi = ic;\n\n\/\/ Use instanceof and casting as usual\nOuterClass.InnerClass ic2 = mi instanceof OuterClass.InnerClass ? \n                            (OuterClass.InnerClass)mi : null;\nSystem.assert(ic2 != null);\n\n\/\/ Construct the outer type\nOuterClass o = new OuterClass();\nSystem.assertEquals(2, OuterClass.getInt());\n\n\/\/ Construct instances of abstract class children\nSystem.assertEquals(5, new OuterClass.ConcreteChildClass().abstractMethod());\n\n\/\/ Illegal - cannot construct an abstract class\n\/\/ new OuterClass.AbstractChildClass();\n\n\/\/ Illegal \u2013 cannot access a static method through an instance\n\/\/ o.getInt();\n\n\/\/ Illegal - cannot call protected method externally\n\/\/ new OuterClass.ConcreteChildClass().method2();<\/code><\/pre>\n\n\n\n<p>\u6b64\u4ee3\u7801\u793a\u4f8b\u6f14\u793a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5916\u5c42\u9636\u7ea7\u7684\u6784\u9020<\/li>\n\n\n\n<li>\u5185\u90e8\u7c7b\u7684\u6784\u9020\u548c\u5185\u90e8\u7c7b\u7684\u58f0\u660e \u63a5\u53e3\u7c7b\u578b<\/li>\n\n\n\n<li>\u53ef\u4ee5\u4e3a\u58f0\u660e\u4e3a\u63a5\u53e3\u7c7b\u578b\u7684\u53d8\u91cf\u5206\u914d\u4e00\u4e2a\u5b9e\u4f8b \u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u7c7b<\/li>\n\n\n\n<li>\u5c06\u63a5\u53e3\u53d8\u91cf\u8f6c\u6362\u4e3a\u5b9e\u73b0 \u8be5\u63a5\u53e3\uff08\u4f7f\u7528\u8fd0\u7b97\u7b26\u9a8c\u8bc1\u540e\uff09<samp>instanceof<\/samp><\/li>\n<\/ul>\n\n\n\n<p><a href=\"https:\/\/developer.salesforce.com\/docs\/atlas.en-us.apexcode.meta\/apexcode\/apex_classes_defining.htm\">ref<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0e Java \u4e00\u6837\uff0c\u60a8\u53ef\u4ee5\u5728 Apex Class\u4e2d\u521b\u5efa\u7c7b\u3002\u7c7b\u662f\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u7684\u6a21\u677f\u6216\u84dd\u56fe\u3002\u5bf9\u8c61\u662f\u7c7b\u7684\u5b9e\u4f8b\u3002 \u4f8b &hellip; <a href=\"http:\/\/www.ponybai.com\/?p=3626\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">Apex Class\u7c7b<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":3627,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[199],"tags":[],"class_list":["post-3626","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-apex-"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Apex Class\u7c7b - \u767d\u767d\u968f\u7b14<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.ponybai.com\/?p=3626\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Apex Class\u7c7b - \u767d\u767d\u968f\u7b14\" \/>\n<meta property=\"og:description\" content=\"\u4e0e Java \u4e00\u6837\uff0c\u60a8\u53ef\u4ee5\u5728 Apex Class\u4e2d\u521b\u5efa\u7c7b\u3002\u7c7b\u662f\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u7684\u6a21\u677f\u6216\u84dd\u56fe\u3002\u5bf9\u8c61\u662f\u7c7b\u7684\u5b9e\u4f8b\u3002 \u4f8b &hellip; \u7ee7\u7eed\u9605\u8bfbApex Class\u7c7b\" \/>\n<meta property=\"og:url\" content=\"http:\/\/www.ponybai.com\/?p=3626\" \/>\n<meta property=\"og:site_name\" content=\"\u767d\u767d\u968f\u7b14\" \/>\n<meta property=\"article:published_time\" content=\"2023-11-21T02:08:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-11-21T02:08:48+00:00\" \/>\n<meta property=\"og:image\" 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