{"id":5828,"date":"2026-08-13T14:09:37","date_gmt":"2026-08-13T06:09:37","guid":{"rendered":"https:\/\/www.xttblog.com\/?p=5828"},"modified":"2026-08-13T14:09:37","modified_gmt":"2026-08-13T06:09:37","slug":"jdk-28-%e4%bf%ae%e5%a4%8d%e5%af%b9%e8%b1%a1%e5%88%9d%e5%a7%8b%e5%8c%96%e9%87%8d%e5%a4%a7-bug%ef%bc%8cjep-539-%e9%87%8d%e6%9e%84%e5%ad%97%e6%ae%b5%e5%88%9d%e5%a7%8b%e5%8c%96","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=5828","title":{"rendered":"JDK 28 \u4fee\u590d\u5bf9\u8c61\u521d\u59cb\u5316\u91cd\u5927 bug\uff0cJEP 539 \u91cd\u6784\u5b57\u6bb5\u521d\u59cb\u5316"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u524d\u6bb5\u65f6\u95f4\u6211\u5199\u6587\u7ae0\u8bf4 Java \u7684\u503c\u5bf9\u8c61\u7ec8\u4e8e\u8981\u843d\u5730\u4e86\uff0cJEP 401 \u73b0\u5728\u5df2\u7ecf\u52a0\u5165 JDK 28 \u4e86\u3002\u6709\u4e86 JEP 401\uff0cJava \u540e\u7eed\u8fd8\u6709\u5f88\u591a JEP \u7b49\u5f85\u7740\u843d\u5730\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4eca\u5929\uff0c\u6211\u53c8\u770b\u5230 <code>JEP 539: Strict Field Initialization in the JVM (Preview)<\/code> \u4e5f\u52a0\u5165\u5230\u4e86 JDK 28 \u4e2d\u3002\u8be5\u7279\u6027\u662f\u4e00\u4e2a\u4f9d\u8d56\u4e8e JEP 401 \u7684\u6539\u52a8\uff0c\u4ece JVM \u5e95\u5c42\u7ed9\u5b57\u6bb5\u4e0a\u4e86\u201c\u9632\u76d7\u9501\u201d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u9488\u5bf9 JEP 539 \u6765\u4e00\u6b21\u6df1\u5ea6\u89e3\u8bfb\u3002\u4e86\u89e3\u5e76\u5b66\u4e60 JVM \u4e25\u683c\u5b57\u6bb5\u521d\u59cb\u5316\uff0c\u4ee5\u53ca\u5bf9 Java \u5bf9\u8c61\u6a21\u578b\u201c\u5b89\u5168\u9501\u201d\u7684\u5347\u7ea7\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u4e2a\u8ba9\u4eba\u5934\u75bc\u7684 Bug<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5148\u770b\u4e00\u6bb5\u4ee3\u7801\uff0c\u4e00\u6bb5\u66fe\u8ba9\u4e0d\u5c11\u8001\u5916\u8e29\u5751\u7684 bug\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class App {\n    public static final long appID = Log.currentPID();\n\n    public static void main() {\n        IO.println(\"App[\" + appID + \"] has started\");\n        Log.log(\"Completed 'main'\");\n    }\n}\n\nclass Log {\n    private static final String prefix = \"App[\" + App.appID + \"]: \";\n\n    public static void log(String msg) {\n        IO.println(prefix + msg);\n    }\n\n    public static long currentPID() {\n        return ProcessHandle.current().pid();\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u8fd9\u6bb5\u4ee3\u7801\uff0c\u5927\u5bb6\u89c9\u5f97\u8f93\u51fa\u4f1a\u662f\u4ec0\u4e48\uff1f\u6bd4\u5982\u7c7b\u4f3c\u4e0b\u9762\u8fd9\u6837\u7684\u8f93\u51fa\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>App[96052] has started\nApp[96052]: Completed 'main'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u8fd9\u4e2a\u8f93\u51fa\u662f\u9519\u7684\u3002\u5b9e\u9645\u8f93\u51fa\u5f88\u53ef\u80fd\u662f\u4e0b\u9762\u8fd9\u6837\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>App[96052] has started\nApp[0]: Completed 'main'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><code>App[0]<\/code>\uff0c\u5f88\u610f\u5916\u5427\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a <code>Log<\/code> \u7c7b\u5728\u521d\u59cb\u5316\u65f6\u8bfb\u53d6\u4e86 <code>App.appID<\/code>\uff0c\u800c\u6b64\u65f6 <code>appID<\/code> \u8fd8\u6ca1\u88ab\u8d4b\u503c\u4e3a\u771f\u6b63\u7684 PID\uff0cJVM \u7ed9\u4e86\u5b83\u9ed8\u8ba4\u503c <code>0<\/code>\u3002\u8fd9\u4e2a <code>0<\/code> \u88ab\u6c38\u4e45\u5d4c\u5165\u4e86 <code>prefix<\/code> \u5b57\u7b26\u4e32\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5c31\u662f Java \u5b57\u6bb5\u521d\u59cb\u5316\u4e2d\u6700\u9690\u853d\u7684\u9677\u9631\u4e4b\u4e00\uff0c<code>\u9ed8\u8ba4\u503c\u88ab\u201c\u5408\u6cd5\u5316\u201d\u4e86<\/code>\u3002<code>0<\/code>\u3001<code>null<\/code>\u3001<code>false<\/code> \u8fd9\u4e9b\u9ed8\u8ba4\u503c\u867d\u7136\u4fdd\u8bc1\u4e86\u5185\u5b58\u5b89\u5168\uff0c\u5374\u5e38\u5e38\u4f2a\u88c5\u6210\u6709\u6548\u6570\u636e\uff0c\u8ba9 Bug \u6f5c\u4f0f\u5f97\u66f4\u6df1\u3001\u66f4\u96be\u8ffd\u8e2a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c JEP 539 \u8981\u89e3\u51b3\u7684\uff0c\u5c31\u662f\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">JEP 539 \u662f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b98\u7f51\u5217\u7684\u5168\u79f0\u662f\uff0c<code>JEP 539: Strict Field Initialization in the JVM (Preview)<\/code>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b80\u5355\u6765\u8bf4\uff0cJEP 539 \u5728 JVM \u5c42\u9762\u5f15\u5165\u4e86\u4e00\u79cd\u201c\u4e25\u683c\u521d\u59cb\u5316\u201d\u7684\u5b57\u6bb5\u6a21\u578b\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>\u88ab\u6807\u8bb0\u4e3a\u4e25\u683c\u521d\u59cb\u5316\u7684\u5b57\u6bb5\uff0c<code>\u5fc5\u987b\u5728\u88ab\u8bfb\u53d6\u4e4b\u524d\u5b8c\u6210\u663e\u5f0f\u521d\u59cb\u5316<\/code>\u3002<code>0<\/code>\u3001<code>null<\/code>\u3001<code>false<\/code> \u8fd9\u7c7b\u9ed8\u8ba4\u503c\u6c38\u8fdc\u4e0d\u4f1a\u88ab\u89c2\u5bdf\u5230\u3002<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e <code>final<\/code> \u5b57\u6bb5\uff0c\u8fd8\u6709\u4e00\u4e2a\u66f4\u5f3a\u7684\u4fdd\u8bc1\uff0c<code>\u6240\u6709\u8bfb\u53d6\u64cd\u4f5c\u90fd\u89c2\u5bdf\u5230\u540c\u4e00\u4e2a\u503c<\/code>\uff0c\u5f7b\u5e95\u675c\u7edd\u521d\u59cb\u5316\u671f\u95f4\u7684\u201c\u503c\u6f02\u79fb\u201d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u5b83\u662f\u4e00\u4e2a<code>\u9884\u89c8\u7248\u7684 JVM \u7279\u6027<\/code>\uff0c\u901a\u8fc7 class \u6587\u4ef6\u4e2d\u7684\u65b0\u6807\u5fd7 <code>ACC_STRICT_INIT<\/code>\uff08<code>0x0800<\/code>\uff09\u6765\u6807\u8bc6\u3002\u5b83\u4e0d\u662f\u4e00\u4e2a Java \u8bed\u8a00\u5c42\u9762\u7684\u65b0\u5173\u952e\u5b57\uff0c\u800c\u662f\u4f9b<code>\u6240\u6709\u751f\u6210 JVM \u5b57\u8282\u7801\u7684\u7f16\u8bd1\u5668<\/code>\u4f7f\u7528\u7684\u5e95\u5c42\u673a\u5236\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6587\u7ae0\u914d\u56fe\u53c2\u89c1\u6211\u7684\u516c\u4f17\u53f7\uff1a<a href=\"https:\/\/mp.weixin.qq.com\/s\/PwIzls_qpX6fEy8Htmtulg\">https:\/\/mp.weixin.qq.com\/s\/PwIzls_qpX6fEy8Htmtulg<\/a>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u9ed8\u8ba4\u503c\u7684\u4f2a\u88c5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u73b0\u6709 Java \u6a21\u578b\u4e2d\uff0c\u672a\u663e\u5f0f\u521d\u59cb\u5316\u7684\u5b57\u6bb5\u4f1a\u88ab\u81ea\u52a8\u8d4b\u4e88\u9ed8\u8ba4\u503c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u540c\u7c7b\u578b\u5bf9\u5e94\u7684\u9ed8\u8ba4\u503c\u4e0d\u540c\uff0c\u5177\u4f53\u5982\u4e0b\u6240\u793a\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6570\u503c\u7c7b\u578b \u2192 <code>0<\/code><\/li><li>\u5e03\u5c14\u7c7b\u578b \u2192 <code>false<\/code><\/li><li>\u5f15\u7528\u7c7b\u578b \u2192 <code>null<\/code><\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u548c\u6570\u636e\u5e93\u7684\u9ed8\u8ba4\u503c\u4e00\u6837\uff0c\u786e\u5b9e\u9632\u6b62\u4e86\u201c\u8bfb\u53d6\u672a\u521d\u59cb\u5316\u5185\u5b58\u201d\u7684\u707e\u96be\uff0c\u4f46\u4e5f\u5e26\u6765\u4e86\u4e00\u4e2a\u526f\u4f5c\u7528\uff0c<code>\u7a0b\u5e8f\u53ef\u80fd\u628a\u9ed8\u8ba4\u503c\u5f53\u6210\u5408\u6cd5\u6570\u636e\u6765\u4f7f\u7528<\/code>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\u8bfb\u5230 <code>null<\/code> \u540e\u4e00\u8def\u4f20\u9012\uff0c\u6700\u7ec8\u5728\u67d0\u4e2a\u9065\u8fdc\u7684\u65b9\u6cd5\u91cc\u89e6\u53d1 <code>NullPointerException<\/code>\u3002JDK 14 \u6539\u8fdb\u4e86 NPE \u7684\u63d0\u793a\u4fe1\u606f\uff0c\u5e2e\u52a9\u6211\u4eec\u5b9a\u4f4d\u5230\u51fa\u9519\u7684\u4ee3\u7801\u884c\uff0c\u4f46\u5b83<code>\u65e0\u6cd5\u5e26\u4f60\u56de\u5230\u90a3\u4e2a\u201c\u672c\u8be5\u521d\u59cb\u5316\u5374\u5fd8\u4e86\u521d\u59cb\u5316\u201d\u7684\u6e90\u5934<\/code>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Final \u5b57\u6bb5\u7684\u4e34\u65f6\u53d8\u8138<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u90fd\u77e5\u9053 <code>final<\/code> \u5b57\u6bb5\u662f\u4e0d\u53ef\u53d8\u7684\u3002\u4f46\u9c9c\u4e3a\u4eba\u77e5\u7684\u662f\uff1a\u5728\u7c7b\u6216\u5bf9\u8c61\u521d\u59cb\u5316\u671f\u95f4\uff0c<code>final<\/code> \u5b57\u6bb5\u662f\u53ef\u4ee5\u88ab\u591a\u6b21\u5199\u5165\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u610f\u5473\u7740\uff0c\u5982\u679c\u5b58\u5728\u5faa\u73af\u4f9d\u8d56\uff08\u5982\u4e0a\u9762\u7684 <code>App<\/code> \u548c <code>Log<\/code>\uff09\uff0c\u4ee3\u7801\u53ef\u80fd\u5728 <code>final<\/code> \u5b57\u6bb5\u8fd8\u6ca1\u5b9a\u7a3f\u65f6\u5c31\u8bfb\u53d6\u4e86\u5b83\uff0c\u5f97\u5230\u4e00\u4e2a\u201c\u4e2d\u95f4\u503c\u201d\u751a\u81f3\u9ed8\u8ba4\u503c\u3002\u521d\u59cb\u5316\u5b8c\u6210\u540e\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u786e\u5b9e\u4e0d\u518d\u53d8\u5316\uff0c\u4f46<code>\u4f24\u5bb3\u5df2\u7ecf\u9020\u6210<\/code>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u672a\u6765\u7684\u8bed\u8a00\u7279\u6027\u94fa\u8def<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JEP 539 \u660e\u786e\u63d0\u5230\uff0c\u4e25\u683c\u5b57\u6bb5\u521d\u59cb\u5316\u662f\u4ee5\u4e0b\u7279\u6027\u7684\u57fa\u7840\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u503c\u7c7b\uff08Value Classes\uff09\uff1aJEP 401 \u4e2d\u5b9a\u4e49\u7684\u65b0\u578b\u7c7b\uff0c\u5b9e\u4f8b\u6ca1\u6709\u5bf9\u8c61\u8eab\u4efd\uff08identity\uff09\uff0c\u4e14\u4e0d\u53ef\u53d8\u3002\u503c\u7c7b\u7684 <code>final<\/code> \u5b9e\u4f8b\u5b57\u6bb5\u5fc5\u987b\u59cb\u7ec8\u89c2\u5bdf\u5230\u76f8\u540c\u7684\u503c\uff0c\u5426\u5219\u201c\u503c\u8bed\u4e49\u201d\u5c31\u5d29\u584c\u4e86\u3002<\/li><li>\u975e\u7a7a\u5b57\u6bb5\uff1a\u672a\u6765\u67d0\u4e9b\u5b57\u6bb5\u53ef\u80fd\u4e0d\u5141\u8bb8\u5b58\u50a8 <code>null<\/code>\uff0c\u8fd9\u7c7b\u5b57\u6bb5\u81ea\u7136\u4e0d\u80fd\u4f9d\u8d56 <code>null<\/code> \u9ed8\u8ba4\u503c\uff0c\u5fc5\u987b\u5728\u8bfb\u53d6\u524d\u663e\u5f0f\u8d4b\u503c\u4e3a\u975e\u7a7a\u503c\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">JVM \u662f\u5982\u4f55\u5b9e\u73b0\u7684\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JEP 539 \u5bf9\u9759\u6001\u5b57\u6bb5\u548c\u5b9e\u4f8b\u5b57\u6bb5\u91c7\u7528\u4e86\u4e0d\u540c\u7684 enforcement \u7b56\u7565\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u9759\u6001\u5b57\u6bb5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">JVM \u5728\u7c7b\u7684\u201c\u5e7c\u866b\u6001\u201d\uff08larval state\uff0c\u5373\u7c7b\u6b63\u5728\u521d\u59cb\u5316\u4f46\u5c1a\u672a\u5b8c\u6210\u7684\u72b6\u6001\uff09\u4e2d\uff0c<code>\u8ffd\u8e2a\u6bcf\u4e2a\u4e25\u683c\u521d\u59cb\u5316\u9759\u6001\u5b57\u6bb5\u7684\u201c\u5df2\u8bbe\u7f6e\u201d\u548c\u201c\u5df2\u8bfb\u53d6\u201d\u72b6\u6001<\/code>\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5982\u679c <code>getstatic<\/code> \u8bd5\u56fe\u8bfb\u53d6\u4e00\u4e2a\u5c1a\u672a\u8bbe\u7f6e\u7684\u4e25\u683c\u521d\u59cb\u5316\u5b57\u6bb5 \u2192 <code>\u629b\u5f02\u5e38<\/code>\u3002<\/li><li>\u5982\u679c <code>putstatic<\/code> \u8bd5\u56fe\u5728 <code>final<\/code> \u5b57\u6bb5\u5df2\u88ab\u8bfb\u53d6\u540e\u518d\u6b21\u5199\u5165 \u2192 <code>\u629b\u5f02\u5e38<\/code>\u3002<\/li><li>\u7c7b\u521d\u59cb\u5316\u5b8c\u6210\u524d\uff0cJVM \u4f1a\u68c0\u67e5\u6240\u6709\u4e25\u683c\u521d\u59cb\u5316\u9759\u6001\u5b57\u6bb5\u662f\u5426\u90fd\u5df2\u8bbe\u7f6e\uff0c\u5426\u5219 \u2192 <code>\u629b\u5f02\u5e38<\/code>\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd0\u884c\u65f6\u52a8\u6001\u68c0\u67e5\u8fd9\u4e9b\u89c4\u5219\u751a\u81f3\u9002\u7528\u4e8e\u53cd\u5c04\uff08<code>Field.set<\/code>\/<code>Field.get<\/code>\uff09\u548c <code>VarHandle<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5b9e\u4f8b\u5b57\u6bb5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u4f8b\u5b57\u6bb5\u7684\u7ea6\u675f\u901a\u8fc7<code>\u589e\u5f3a\u5b57\u8282\u7801\u9a8c\u8bc1\u5668\uff08\u5b57\u8282\u7801\u9a8c\u8bc1\u5668\u9759\u6001\u68c0\u67e5\uff09<\/code>\u6765\u5b9e\u73b0\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5728\u201c\u65e9\u671f\u5e7c\u866b\u6001\u201d\uff08early-larval\uff0c\u5373 <code>super()<\/code> \u8c03\u7528\u524d\uff09\uff0c\u9a8c\u8bc1\u5668\u7ef4\u62a4\u4e00\u4e2a\u201c\u672a\u8bbe\u7f6e\u5b57\u6bb5\u5217\u8868\u201d\u3002<\/li><li>\u6bcf\u6b21 <code>putfield<\/code> \u5199\u5165\u4e00\u4e2a\u4e25\u683c\u521d\u59cb\u5316\u5b57\u6bb5\uff0c\u5c31\u4ece\u5217\u8868\u4e2d\u79fb\u9664\u8be5\u5b57\u6bb5\u3002<\/li><li>\u5728\u8c03\u7528\u7236\u7c7b\u6784\u9020\u5668 <code>super()<\/code> \u524d\uff0c\u5217\u8868\u5fc5\u987b\u4e3a\u7a7a\u3002\u5373<code>\u5f53\u524d\u7c7b\u7684\u6240\u6709\u4e25\u683c\u521d\u59cb\u5316\u5b9e\u4f8b\u5b57\u6bb5\u90fd\u5fc5\u987b\u5df2\u5b8c\u6210\u8d4b\u503c<\/code>\u3002<\/li><li>\u4e25\u683c\u521d\u59cb\u5316\u7684 <code>final<\/code> \u5b9e\u4f8b\u5b57\u6bb5\u53ea\u80fd\u5728\u65e9\u671f\u5e7c\u866b\u6001\u5199\u5165\uff0c\u8fdb\u5165\u665a\u671f\u5e7c\u866b\u6001\u540e\u7981\u6b62\u4fee\u6539\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u652f\u6301\u8fd9\u79cd\u65b0\u7684\u7c7b\u578b\u72b6\u6001\uff0cclass \u6587\u4ef6\u7684 <code>StackMapTable<\/code> \u5c5e\u6027\u8fd8\u5f15\u5165\u4e86\u4e00\u79cd\u65b0\u7684\u5e27\u7c7b\u578b\uff1a<code>early_larval_frame<\/code>\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">JIT \u4f18\u5316\u7684\u7ea2\u5229<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e25\u683c\u521d\u59cb\u5316\u7684 <code>final<\/code> \u5b57\u6bb5\u4f1a\u88ab HotSpot JIT \u7f16\u8bd1\u5668\u89c6\u4e3a<code>\u53ef\u4fe1\u5e38\u91cf<\/code>\uff08trusted\uff09\u3002\u56e0\u4e3a JVM \u4fdd\u8bc1\u8fd9\u4e2a\u5b57\u6bb5\u7684\u503c\u6c38\u8fdc\u4e0d\u4f1a\u6539\u53d8\uff0cJIT \u53ef\u4ee5\u5728\u9996\u6b21\u8bfb\u53d6\u540e<code>\u590d\u7528\u8be5\u503c<\/code>\uff0c\u51cf\u5c11\u5bf9\u5185\u5b58\u7684\u91cd\u590d\u8bbf\u95ee\uff0c\u4ece\u800c\u63d0\u5347\u8fd0\u884c\u6027\u80fd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e9b\u6539\u52a8\uff0c\u5bf9\u6211\u4eec\u666e\u901a Java \u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u6682\u65f6\u201c\u65e0\u611f\u201d\uff0c\u4f46\u957f\u671f\u80af\u5b9a\u662f\u53d7\u76ca\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">JEP 539 \u662f\u4e00\u4e2a<code>JVM \u7279\u6027<\/code>\uff0c\u4e0d\u662f\u8bed\u8a00\u7279\u6027\u3002\u4f60\u5199 Java \u4ee3\u7801\u65f6\u4e0d\u4f1a\u770b\u5230\u65b0\u7684 <code>strict<\/code> \u5173\u952e\u5b57\u3002<code>javac<\/code> \u4e5f\u4e0d\u4f1a\u5bf9\u73b0\u6709\u4ee3\u7801\u542f\u7528\u4e25\u683c\u521d\u59cb\u5316\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u5f53\u6211\u4eec\u5f00\u59cb\u4f7f\u7528<code>\u503c\u7c7b\uff08Value Classes\uff09<\/code>\u65f6\uff0c\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u5c06\u503c\u7c7b\u7684\u6240\u6709\u5b57\u6bb5\u6807\u8bb0\u4e3a <code>ACC_STRICT_INIT<\/code>\u3002\u5c4a\u65f6\uff0c\u503c\u7c7b\u7684\u4e0d\u53ef\u53d8\u6027\u548c\u4e00\u81f4\u6027\u5c06\u7531 JVM \u786c\u6838\u4fdd\u8bc1\uff0c\u800c\u4e0d\u662f\u9760\u7ea6\u5b9a\u6216\u6587\u6863\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u5bf9\u4e8e\u6846\u67b6\u548c\u5e93\u4f5c\u8005\uff0c\u5c31\u9700\u8981\u65f6\u523b\u5173\u6ce8\u53cd\u5c04\u548c\u5e8f\u5217\u5316\u3002JEP 539 \u5bf9\u53cd\u5c04\u548c\u5e8f\u5217\u5316\u6709\u4e24\u9879\u91cd\u8981\u9650\u5236\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6df1\u5ea6\u53cd\u5c04\u53d7\u9650\uff1a\u4e25\u683c\u521d\u59cb\u5316\u7684 <code>final<\/code> \u5b9e\u4f8b\u5b57\u6bb5\u88ab\u5f52\u7c7b\u4e3a\u201c\u4e0d\u53ef\u4fee\u6539\u201d\uff0c\u4e0e <code>record<\/code> \u7c7b\u7684 <code>final<\/code> \u5b57\u6bb5\u548c\u9759\u6001 <code>final<\/code> \u5b57\u6bb5\u540c\u7ea7\u3002\u5373\u4f7f\u4f7f\u7528 <code>--enable-final-field-mutation<\/code> \u4e5f\u65e0\u6cd5\u7ed5\u8fc7\u3002\u8bd5\u56fe\u901a\u8fc7\u53cd\u5c04 <code>set<\/code> \u8fd9\u6837\u7684\u5b57\u6bb5\u4f1a\u629b\u51fa <code>IllegalAccessException<\/code>\u3002<\/li><li>\u9ed8\u8ba4\u5e8f\u5217\u5316\u53d7\u9650\uff1a<code>ObjectInputStream<\/code> \u7684\u9ed8\u8ba4\u53cd\u5e8f\u5217\u5316\u4f1a\u8df3\u8fc7\u6784\u9020\u5668\uff0c\u8fd9\u7ed5\u8fc7\u4e86\u4e25\u683c\u521d\u59cb\u5316\u7684\u9a8c\u8bc1\u3002\u56e0\u6b64\uff0c\u5305\u542b\u4e25\u683c\u521d\u59cb\u5316\u5b9e\u4f8b\u5b57\u6bb5\u7684\u7c7b\uff08\u975e record\uff09\u5982\u679c\u76f4\u63a5\u4f7f\u7528\u9ed8\u8ba4\u5e8f\u5217\u5316\uff0c\u4f1a\u629b\u51fa <code>InvalidClassException<\/code>\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b98\u65b9\u7ed9\u51fa\u7684\u89e3\u51b3\u65b9\u6848\u662f\u5b9e\u73b0 <code>writeReplace<\/code> \u548c <code>readResolve<\/code> \u65b9\u6cd5\uff0c\u7528\u66ff\u4ee3\u5bf9\u8c61\u8fdb\u884c\u5e8f\u5217\u5316\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u5bf9\u4e8e Kotlin\u3001Scala\u3001Groovy \u7b49 JVM \u8bed\u8a00\u7684\u7f16\u8bd1\u5668\u4f5c\u8005\uff0c\u73b0\u5728\u6709\u4e86\u4e00\u4e2a<code>\u66f4\u5f3a\u58ee\u7684\u5b57\u6bb5\u521d\u59cb\u5316\u6a21\u578b<\/code>\u53ef\u4f9b\u9009\u62e9\u3002\u5982\u679c\u67d0\u79cd\u8bed\u8a00\u7279\u6027\u9700\u8981\u66f4\u5f3a\u7684\u521d\u59cb\u5316\u4fdd\u8bc1\uff0c\u53ef\u4ee5\u76f4\u63a5\u5229\u7528 <code>ACC_STRICT_INIT<\/code>\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e0e JEP 401 \u7684\u5171\u751f\u5173\u7cfb<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JEP 539 \u548c JEP 401\uff08Value Objects\uff0c\u503c\u5bf9\u8c61\uff09\u662f<code>\u7d27\u5bc6\u8026\u5408<\/code>\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u503c\u5bf9\u8c61\u7684\u6838\u5fc3\u7279\u5f81\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u4ec5\u5305\u542b <code>final<\/code> \u5b57\u6bb5<\/li><li>\u6ca1\u6709\u5bf9\u8c61\u8eab\u4efd\uff08identity\uff09<\/li><li>\u5b8c\u5168\u901a\u8fc7\u5b57\u6bb5\u503c\u6765\u533a\u5206\u76f8\u7b49\u6027<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u503c\u5bf9\u8c61\u7684\u5b57\u6bb5\u5728\u521d\u59cb\u5316\u671f\u95f4\u80fd\u89c2\u5bdf\u5230\u4e0d\u540c\u7684\u503c\uff0c\u90a3\u201c\u503c\u8bed\u4e49\u201d\u5c31\u662f\u7a7a\u8c08\u3002JEP 539 \u63d0\u4f9b\u7684\u4e25\u683c\u521d\u59cb\u5316\u4fdd\u8bc1\uff0c\u6b63\u662f JEP 401 \u7684<code>\u5e95\u5c42\u57fa\u77f3<\/code>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2026 \u5e74 7 \u6708\u5e95\uff0cJEP 539 \u548c JEP 401 \u53cc\u53cc\u4ece\u201c\u5019\u9009\u201d\u5347\u7ea7\u4e3a\u201c\u5df2\u5b9a\u5411\u201d\uff0c\u76ee\u6807\u7248\u672c\u5747\u4e3a <code>JDK 28<\/code>\u3002\u8fd9\u610f\u5473\u7740\uff0c\u5728 JDK 28 \u4e2d\uff0c\u6211\u4eec\u5c06\u9996\u6b21\u9884\u89c8\u4f53\u9a8c\u5230\u503c\u5bf9\u8c61\u53ca\u5176\u80cc\u540e\u7684\u4e25\u683c\u521d\u59cb\u5316\u673a\u5236\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JEP 539 \u4e0d\u50cf Pattern Matching\u3001Virtual Threads \u90a3\u6837\u6709 flashy \u7684\u8bed\u6cd5\u7cd6\uff0c\u4f46\u5b83\u662f JVM \u5bf9\u8c61\u6a21\u578b\u7684\u4e00\u6b21<code>\u6df1\u5c42\u52a0\u56fa<\/code>\uff1a<\/p>\n\n\n\n<table class=\"wp-block-table\"><thead><tr><th>\u7ef4\u5ea6<\/th><th>\u73b0\u6709\u6a21\u578b<\/th><th>JEP 539 \u4e25\u683c\u521d\u59cb\u5316<\/th><\/tr><\/thead><tbody><tr><td>\u9ed8\u8ba4\u503c<\/td><td><code>0<\/code>\/<code>null<\/code>\/<code>false<\/code> \u53ef\u88ab\u89c2\u5bdf\u5230<\/td><td>\u9ed8\u8ba4\u503c\u4e0d\u53ef\u89c1\uff0c\u5fc5\u987b\u663e\u5f0f\u521d\u59cb\u5316<\/td><\/tr><tr><td>final \u4e00\u81f4\u6027<\/td><td>\u521d\u59cb\u5316\u671f\u95f4\u53ef\u80fd\u89c2\u5bdf\u5230\u4e0d\u540c\u503c<\/td><td>\u6240\u6709\u8bfb\u53d6\u4fdd\u8bc1\u76f8\u540c\u503c<\/td><\/tr><tr><td>\u9519\u8bef\u53d1\u73b0<\/td><td>\u8fd0\u884c\u65f6 NPE\uff0c\u5b9a\u4f4d\u56f0\u96be<\/td><td>\u521d\u59cb\u5316\u9636\u6bb5\u5373\u629b\u5f02\u5e38\u6216\u9a8c\u8bc1\u5931\u8d25<\/td><\/tr><tr><td>JIT \u4f18\u5316<\/td><td>final \u5b57\u6bb5\u9700\u4fdd\u5b88\u5904\u7406<\/td><td>\u53ef\u6807\u8bb0\u4e3a trusted\uff0c\u51cf\u5c11\u5185\u5b58\u8bbf\u95ee<\/td><\/tr><\/tbody><\/table>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u4e0d\u4f1a\u7acb\u523b\u6539\u53d8\u6211\u4eec\u5199 Java \u4ee3\u7801\u7684\u65b9\u5f0f\uff0c\u4f46\u5b83\u6b63\u5728<code>\u4e3a\u503c\u7c7b\u3001\u975e\u7a7a\u7c7b\u578b\u7b49\u4e0b\u4e00\u4ee3 Java \u7279\u6027\u94fa\u8bbe\u8f68\u9053<\/code>\u3002\u5f53\u8fd9\u4e9b\u7279\u6027\u5230\u6765\u65f6\uff0c\u6211\u4eec\u6216\u8bb8\u4f1a\u53d1\u73b0 Java \u7684\u5bf9\u8c61\u6a21\u578b\u53d8\u5f97\u66f4\u52a0\u4e25\u8c28\u3001\u5b89\u5168\u548c\u9ad8\u6548\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u671f\u5f85 Java \u518d\u6b21\u4f1f\u5927\uff01\u671f\u5f85\u66f4\u591a\u65b0\u7279\u6027\u5c3d\u5feb\u5230\u6765\uff01<\/p>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=5828\">JDK 28 \u4fee\u590d\u5bf9\u8c61\u521d\u59cb\u5316\u91cd\u5927 bug\uff0cJEP 539 \u91cd\u6784\u5b57\u6bb5\u521d\u59cb\u5316<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>\u524d\u6bb5\u65f6\u95f4\u6211\u5199\u6587\u7ae0\u8bf4 Java \u7684\u503c\u5bf9\u8c61\u7ec8\u4e8e\u8981\u843d\u5730\u4e86\uff0cJEP 401 \u73b0\u5728\u5df2\u7ecf\u52a0\u5165 JDK 28 \u4e86\u3002\u6709\u4e86 JE 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