{"id":15956,"date":"2024-07-17T08:54:18","date_gmt":"2024-07-17T00:54:18","guid":{"rendered":"https:\/\/92it.top\/?p=15956"},"modified":"2024-07-17T08:54:18","modified_gmt":"2024-07-17T00:54:18","slug":"java-9-%e4%b8%ba%e4%bb%80%e4%b9%88%e8%a6%81%e5%9c%a8%e6%8e%a5%e5%8f%a3%e4%b8%ad%e5%bc%95%e5%85%a5-private-%e6%96%b9%e6%b3%95%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=15956","title":{"rendered":"Java 9 \u4e3a\u4ec0\u4e48\u8981\u5728\u63a5\u53e3\u4e2d\u5f15\u5165 private \u65b9\u6cd5\uff1f"},"content":{"rendered":"\n<p>\u8f6c\u8f7d\uff1a<a href=\"https:\/\/mp.weixin.qq.com\/s?__biz=MzIwNDAyOTI2Nw==&amp;mid=2247498302&amp;idx=2&amp;sn=b0c41d9a88369e74f276568226592a74&amp;chksm=96c4d602a1b35f14abb5e4e34f33e8a650dcc436c421abe9b3948facfa1b7ffe7291b89d6b39&amp;cur_album_id=2818595943724974083&amp;scene=190#rd\">Java 9 \u4e3a\u4ec0\u4e48\u8981\u5728\u63a5\u53e3\u4e2d\u5f15\u5165 private \u65b9\u6cd5\uff1f<\/a><\/p>\n\n\n\n<p>\u63a5\u53e3\u901a\u5e38\u662f\u4e3a\u5b50\u7c7b\u5b9a\u4e49\u4e00\u4e9b\u9700\u8981\u88ab\u5b9e\u73b0\u7684 public \u62bd\u8c61\u65b9\u6cd5\uff0c\u4f46\u662f\uff0c\u5728 Java 9 \u53ca\u5176\u4ee5\u540e\u7684\u7248\u672c\u4e2d\uff0c\u5141\u8bb8\u5728\u63a5\u53e3\u4e2d\u5b9a\u4e49 private \u65b9\u6cd5\uff0c\u4e3a\u4ec0\u4e48 Java \u4f1a\u5728 \u63a5\u53e3\u4e2d\u5f15\u5165 private\u65b9\u6cd5\uff0c\u8fd9\u7bc7\u6587\u7ae0\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u5176\u4e2d\u7684\u7f18\u7531\u3002<\/p>\n\n\n\n<p><strong>\u63a5\u53e3\u65b9\u6cd5\u6539\u53d8\u5386\u53f2<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5728 Java 8 \u4e4b\u524d\uff0c\u63a5\u53e3\u53ea\u80fd\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u6ca1\u6709\u5b9e\u73b0\uff0c\u5e76\u4e14\u6240\u6709\u8fd9\u4e9b\u65b9\u6cd5\u90fd\u662f <code>public<\/code> \u7684\u3002\u6b64\u5916\uff0c\u63a5\u53e3\u4e2d\u8fd8\u53ef\u4ee5\u5305\u542b\u9759\u6001\u5e38\u91cf\uff08public static final\uff09\uff0c\u4f46\u4e0d\u80fd\u5305\u542b\u4efb\u4f55\u5b9e\u73b0\u4ee3\u7801\u3002\u8fd9\u79cd\u8bbe\u8ba1\u4e3b\u8981\u662f\u4e3a\u4e86\u786e\u4fdd\u63a5\u53e3\u4ec5\u4f5c\u4e3a\u884c\u4e3a\u89c4\u8303\u7684\u5b9a\u4e49\uff0c\u800c\u4e0d\u6d89\u53ca\u5177\u4f53\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p>\u5728 Java 8 \u4e2d\u5f15\u5165\u4e86&nbsp;default methods\uff08\u9ed8\u8ba4\u65b9\u6cd5\uff09\uff0c\u4f7f\u5f97\u63a5\u53e3\u53ef\u4ee5\u5305\u542b\u5e26\u6709\u9ed8\u8ba4\u5b9e\u73b0\u7684\u65b9\u6cd5\uff0c\u8fd9\u4e00\u7279\u6027\u4f7f\u5f97\u63a5\u53e3\u80fd\u591f\u8fdb\u5316\uff0c\u800c\u4e0d\u7834\u574f\u73b0\u6709\u7684\u5b9e\u73b0\u7c7b\uff0c\u4ece\u800c\u5f88\u4f18\u96c5\u7684\u517c\u5bb9\u4e86\u8001\u7248\u672c\u3002<\/p>\n\n\n\n<p>\u7136\u800c\uff0c\u5230\u4e86 Java 9 \uff0c\u63a5\u53e3\u7684\u529f\u80fd\u8fdb\u4e00\u6b65\u88ab\u6269\u5c55\u4e86\uff0c\u5b83\u5141\u8bb8\u5728\u63a5\u53e3\u4e2d\u5b9a\u4e49\u79c1\u6709\u65b9\u6cd5\uff0c\u4f46\u662f\uff0c\u79c1\u6709\u65b9\u6cd5\u53ea\u80fd\u5728\u63a5\u53e3\u5185\u90e8\u8c03\u7528\uff0c\u7528\u4e8e\u652f\u6301\u9ed8\u8ba4\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\u7684\u5b9e\u73b0\uff0c\u589e\u5f3a\u4e86\u4ee3\u7801\u7684\u590d\u7528\u6027\u548c\u6a21\u5757\u5316\u3002<\/p>\n\n\n\n<p><strong>\u63a5\u53e3\u4e2d\u79c1\u6709\u65b9\u6cd5\u7684\u5b9a\u4e49<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u5728 Java 9 \u7684\u63a5\u53e3\u4e2d\uff0c\u79c1\u6709\u65b9\u6cd5\u53ef\u4ee5\u5206\u4e3a\u5b9e\u4f8b\u79c1\u6709\u65b9\u6cd5\u548c\u9759\u6001\u79c1\u6709\u65b9\u6cd5\u4e24\u79cd\u7c7b\u578b\uff1a<\/p>\n\n\n\n<ul>\n<li>\u5b9e\u4f8b\u79c1\u6709\u65b9\u6cd5\uff1a\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u80fd\u5728\u63a5\u53e3\u5916\u90e8\u8c03\u7528\uff0c\u53ea\u80fd\u5728\u63a5\u53e3\u5185\u90e8\u7684\u9ed8\u8ba4\u65b9\u6cd5\u6216\u5176\u4ed6\u79c1\u6709\u65b9\u6cd5\u4e2d\u8c03\u7528\u3002<\/li>\n\n\n\n<li>\u9759\u6001\u79c1\u6709\u65b9\u6cd5\uff1a\u8fd9\u4e9b\u65b9\u6cd5\u4e5f\u662f\u53ea\u80fd\u5728\u63a5\u53e3\u5185\u90e8\u8c03\u7528\uff0c\u4f46\u5b83\u4eec\u662f\u9759\u6001\u7684\uff0c\u53ef\u4ee5\u5728\u9759\u6001\u4e0a\u4e0b\u6587\u4e2d\u8c03\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public interface InterfacePrivateMethodTest {\n    default void defaultMethod() {\n        privateMethod();\n    }\n   \n    private void privateMethod() {\n        System.out.println(\"This is a private method.\");\n    }\n    \/\/ \u5b9e\u4f8b\u79c1\u6709\u65b9\u6cd5\n    static void staticMethod() {\n        staticPrivateMethod();\n    }\n\n    \/\/ \u4e00\u4e2a\u9759\u6001\u79c1\u6709\u65b9\u6cd5\n    private static void staticPrivateMethod() {\n        System.out.println(\"This is a static private method.\");\n    }\n}<\/pre>\n\n\n\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cprivateMethod \u662f\u4e00\u4e2a\u5b9e\u4f8b\u79c1\u6709\u65b9\u6cd5\uff0c\u800c staticPrivateMethod \u662f\u4e00\u4e2a\u9759\u6001\u79c1\u6709\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p><strong>\u63a5\u53e3\u5b9a\u4e49\u79c1\u6709\u65b9\u6cd5\u7684\u539f\u56e0<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>Java 9 \u7684\u63a5\u53e3\u4e2d\u5b9a\u4e49 private \u63a5\u53e3\uff0c\u4e3b\u8981\u6709\u4ee5\u4e0b 3\u4e2a\u539f\u56e0\uff1a<\/p>\n\n\n\n<ol>\n<li>\u63d0\u9ad8\u4ee3\u7801\u590d\u7528\u6027<\/li>\n\n\n\n<li>\u589e\u5f3a\u4ee3\u7801\u53ef\u7ef4\u62a4\u6027<\/li>\n\n\n\n<li>\u4fdd\u6301\u63a5\u53e3\u7684\u6e05\u6670\u6027<\/li>\n<\/ol>\n\n\n\n<p><strong>\u63d0\u9ad8\u4ee3\u7801\u590d\u7528\u6027<\/strong><\/p>\n\n\n\n<p>\u79c1\u6709\u65b9\u6cd5\u4f7f\u5f97\u63a5\u53e3\u5185\u90e8\u7684\u4ee3\u7801\u53ef\u4ee5\u5728\u591a\u4e2a\u9ed8\u8ba4\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\u4e4b\u95f4\u5171\u4eab\u3002<\/p>\n\n\n\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6709\u591a\u4e2a\u9ed8\u8ba4\u65b9\u6cd5\u9700\u8981\u6267\u884c\u76f8\u4f3c\u7684\u64cd\u4f5c\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u53ef\u4ee5\u63d0\u53d6\u5230\u79c1\u6709\u65b9\u6cd5\u4e2d\uff0c\u4ece\u800c\u907f\u514d\u4ee3\u7801\u91cd\u590d\u3002\u5982\u4e0b\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public interface InterfacePrivateMethodTest {\n    default void defaultMethod1() {\n        privateMethod();\n        \/\/ \u5176\u4ed6\u903b\u8f91\n    }\n\n    default void defaultMethod2() {\n        privateMethod();\n        \/\/ \u5176\u4ed6\u903b\u8f91\n    }\n\n    private void privateMethod() {\n        System.out.println(\"Shared logic between default methods.\");\n    }\n}<\/pre>\n\n\n\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u6709\u4e24\u4e2a default \u65b9\u6cd5\uff1adefaultMethod1() \u548c defaultMethod2()\uff0c\u5b83\u4eec\u4e4b\u95f4\u5b58\u5728\u5171\u540c\u7684\u903b\u8f91\uff0c\u56e0\u6b64\uff0c\u53ef\u4ee5\u628a\u8fd9\u90e8\u5206\u903b\u8f91\u62bd\u79bb\u6210\u4e00\u4e2a\u516c\u5171\u7684 private \u65b9\u6cd5 privateMethod()\u3002<\/p>\n\n\n\n<p><strong>\u589e\u5f3a\u4ee3\u7801\u53ef\u7ef4\u62a4\u6027<\/strong><\/p>\n\n\n\n<p>\u901a\u8fc7\u5c06\u5171\u4eab\u903b\u8f91\u63d0\u53d6\u5230\u79c1\u6709\u65b9\u6cd5\u4e2d\uff0c\u4ee3\u7801\u53d8\u5f97\u66f4\u52a0\u6a21\u5757\u5316\u3002\u5982\u679c\u9700\u8981\u4fee\u6539\u5171\u4eab\u903b\u8f91\uff0c\u53ea\u9700\u4fee\u6539\u79c1\u6709\u65b9\u6cd5\uff0c\u800c\u4e0d\u5fc5\u5728\u6bcf\u4e2a\u9ed8\u8ba4\u65b9\u6cd5\u4e2d\u8fdb\u884c\u4fee\u6539\u3002\u8fd9\u4e0d\u4ec5\u51cf\u5c11\u4e86\u4ee3\u7801\u51fa\u9519\u7684\u673a\u4f1a\uff0c\u8fd8\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n\n\n\n<p><strong>\u4fdd\u6301\u63a5\u53e3\u7684\u6e05\u6670\u6027<\/strong><\/p>\n\n\n\n<p>\u63a5\u53e3\u7684\u4e3b\u8981\u804c\u8d23\u662f\u5b9a\u4e49\u884c\u4e3a\u89c4\u8303\uff0c\u800c\u4e0d\u662f\u5177\u4f53\u7684\u5b9e\u73b0\u3002\u5982\u679c\u5728\u63a5\u53e3\u4e2d\u6dfb\u52a0\u5927\u91cf\u7684\u9ed8\u8ba4\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u80fd\u5305\u542b\u5f88\u591a\u91cd\u590d\u7684\u5b9e\u73b0\u903b\u8f91\uff0c\u4f1a\u4f7f\u63a5\u53e3\u53d8\u5f97\u81c3\u80bf\u4e14\u96be\u4ee5\u7406\u89e3\u3002\u901a\u8fc7\u5c06\u8fd9\u4e9b\u5b9e\u73b0\u903b\u8f91\u79fb\u5230\u79c1\u6709\u65b9\u6cd5\u4e2d\uff0c\u53ef\u4ee5\u4fdd\u6301\u63a5\u53e3\u7684\u6e05\u6670\u6027\u548c\u7b80\u6d01\u6027\u3002<\/p>\n\n\n\n<p><strong>\u63a5\u53e3\u4e2d\u79c1\u6709\u65b9\u6cd5\u7684\u5b9e\u9645\u573a\u666f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>\u6784\u5efa\u590d\u6742\u7684\u9ed8\u8ba4\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<p>\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u9ed8\u8ba4\u65b9\u6cd5\u6709\u65f6\u9700\u8981\u6267\u884c\u4e00\u7cfb\u5217\u590d\u6742\u7684\u64cd\u4f5c\uff0c\u4e3a\u4e86\u4fdd\u6301\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u590d\u6742\u7684\u64cd\u4f5c\u5206\u89e3\u4e3a\u591a\u4e2a\u79c1\u6709\u65b9\u6cd5\uff0c\u5e76\u5728\u9ed8\u8ba4\u65b9\u6cd5\u4e2d\u8c03\u7528\u5b83\u4eec\u3002<\/p>\n\n\n\n<p>\u5982\u4e0b\u4ee3\u7801\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public interface ComplexInterface {\n    default void complexDefaultMethod() {\n        stepOne();\n        stepTwo();\n        stepThree();\n    }\n\n    private void stepOne() {\n       \/\/ \u903b\u8f91\n    }\n\n    private void stepTwo() {\n        \/\/ \u903b\u8f91\n    }\n\n    private void stepThree() {\n        \/\/ \u903b\u8f91\n    }\n}<\/pre>\n\n\n\n<p><strong>\u5b9e\u73b0\u9759\u6001\u5de5\u5177\u65b9\u6cd5<\/strong><\/p>\n\n\n\n<p>\u6709\u65f6\u5019\uff0c\u63a5\u53e3\u4e2d\u9700\u8981\u5b9a\u4e49\u4e00\u4e9b\u9759\u6001\u5de5\u5177\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u88ab\u5b9e\u73b0\u7c7b\u76f4\u63a5\u8c03\u7528\uff0c\u901a\u8fc7\u4f7f\u7528\u79c1\u6709\u9759\u6001\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5c06\u8fd9\u4e9b\u5de5\u5177\u65b9\u6cd5\u4e2d\u7684\u5171\u4eab\u903b\u8f91\u63d0\u53d6\u51fa\u6765\uff0c\u63d0\u9ad8\u4ee3\u7801\u590d\u7528\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n\n\n\n<p>\u5982\u4e0b\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">public interface UtilityInterface {\n    static void utilityMethod1() {\n        sharedUtilityLogic();\n    }\n\n    static void utilityMethod2() {\n        sharedUtilityLogic();\n    }\n\n    private static void sharedUtilityLogic() {\n        System.out.println(\"Shared utility logic.\");\n    }\n}\n\n<\/pre>\n\n\n\n<p><strong>\u79c1\u6709\u65b9\u6cd5\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator 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