{"id":14756,"date":"2023-09-22T13:33:32","date_gmt":"2023-09-22T05:33:32","guid":{"rendered":"https:\/\/aif.amtbbs.org\/?p=14756"},"modified":"2023-09-22T13:33:32","modified_gmt":"2023-09-22T05:33:32","slug":"java-21-%e6%ad%a3%e5%bc%8f%e5%8f%91%e5%b8%83%ef%bc%81","status":"publish","type":"post","link":"https:\/\/aif.amtbbs.org\/index.php\/2023\/09\/22\/14756\/","title":{"rendered":"Java 21 \u6b63\u5f0f\u53d1\u5e03\uff01"},"content":{"rendered":"<p>9 \u6708 19 \u65e5\uff0c\u4ee5\u516d\u4e2a\u6708\u4e3a\u66f4\u65b0\u9891\u6b21\u7684 Java \u6b63\u5f0f\u53d1\u5e03\u4e86\u6700\u65b0\u7684\u957f\u671f\u652f\u6301\u7248\u672c\u2014\u2014Java 21\uff0c\u8fd9\u4e00\u7248\u672c\u5c06\u83b7\u5f97\u5b98\u65b9\u00a05 \u5e74\u91cd\u8981\u7684\u652f\u6301\uff0c\u8fd9\u610f\u5473\u7740\u5bf9\u4e8e\u5f00\u53d1\u8005\u3001\u4f01\u4e1a\u800c\u8a00\uff0c\u5982\u679c\u60f3\u8981\u7528\u4e0a\u7a33\u5b9a\u53c8\u524d\u6cbf\u7684 Java\uff0cJDK 21 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\u8868\u8fbe\u5f0f\u6216\u8bed\u53e5\u53ef\u4ee5\u6839\u636e\u591a\u4e2a\u6a21\u5f0f\uff08\u6bcf\u4e2a\u6a21\u5f0f\u90fd\u6709\u7279\u5b9a\u7684\u64cd\u4f5c\uff09\u8fdb\u884c\u6d4b\u8bd5\uff0c\u4ece\u800c\u53ef\u4ee5\u5b89\u5168\u3001\u7b80\u6d01\u5730\u8868\u8fbe\u9762\u5411\u6570\u636e\u7684\u590d\u6742\u67e5\u8be2\u3002\u8be5\u529f\u80fd\u6700\u521d\u5728 JDK 17 \u4e2d\u63d0\u51fa\uff0c\u968f\u540e\u5728 JDK 18\u3001JDK 19 \u548c JDK 20 \u4e2d\u5f97\u5230\u6539\u8fdb\u3002\u5b83\u5c06\u5728 JDK 21 \u4e2d\u6700\u7ec8\u5b8c\u6210\uff0c\u5e76\u6839\u636e\u53cd\u9988\u548c\u7ecf\u9a8c\u8fdb\u4e00\u6b65\u5b8c\u5584\u3002\u4e0e\u4ee5\u524d\u7684 JEP \u76f8\u6bd4\uff0c\u4e3b\u8981\u7684\u53d8\u5316\u662f\u5220\u9664\u4e86\u62ec\u53f7\u6a21\u5f0f\uff0c\u5e76\u5141\u8bb8\u4f7f\u7528\u9650\u5b9a\u7684\u679a\u4e3e\u5e38\u91cf\uff08\u5982\u5e26\u6709 switch \u8868\u8fbe\u5f0f\u548c\u8bed\u53e5\u7684 case \u5e38\u91cf\uff09\u3002<\/li>\n<li><strong>\u5916\u90e8\u51fd\u6570\u4e0e\u5185\u5b58 API\uff08\u7b2c\u4e09\u6b21\u9884\u89c8\uff09<\/strong>\n<p>\u5141\u8bb8 Java \u7a0b\u5e8f\u4e0e Java \u8fd0\u884c\u65f6\u4e4b\u5916\u7684\u4ee3\u7801\u548c\u6570\u636e\u8fdb\u884c\u4e92\u64cd\u4f5c\u3002\u901a\u8fc7\u6709\u6548\u5730\u8c03\u7528\u5916\u90e8\u51fd\u6570\u548c\u5b89\u5168\u8bbf\u95ee\u5916\u90e8\u5185\u5b58\uff0c\u8be5 API \u4f7f Java \u7a0b\u5e8f\u80fd\u591f\u8c03\u7528\u672c\u5730\u5e93\u5e76\u5904\u7406\u672c\u673a\u6570\u636e\uff0c\u800c\u4e0d\u4f1a\u51fa\u73b0 JNI\uff08Java Native Interface\uff09\u7684\u8106\u5f31\u6027\u548c\u5371\u9669\u6027\u3002\u8be5 API \u5148\u524d\u5728 JDK 20 \u548c JDK 19 \u4e2d\u8fdb\u884c\u4e86\u9884\u89c8\u3002JDK 21 \u9884\u89c8\u4e2d\u7684\u6539\u8fdb\u5305\u62ec\u589e\u5f3a\u7684\u5e03\u5c40\u8def\u5f84\uff0c\u589e\u52a0\u4e86\u4e00\u4e2a\u7528\u4e8e\u53d6\u6d88\u5f15\u7528\u5730\u5740\u5e03\u5c40\u7684\u65b0\u5143\u7d20\uff0c\u4ee5\u53ca\u96c6\u4e2d\u7ba1\u7406 Arena \u63a5\u53e3\u4e2d\u672c\u5730\u6bb5\u7684\u751f\u547d\u5468\u671f\uff1b\u5b9e\u73b0\u4e86\u4e00\u4e2a\u540e\u5907\u672c\u5730\u94fe\u63a5\u5668\uff1b\u5220\u9664\u4e86 VaList\u3002<\/li>\n<li><strong>\u672a\u547d\u540d\u6a21\u5f0f\u548c\u53d8\u91cf\uff08\u9884\u89c8\u7248\uff09<\/strong>\n<p>\u672a\u547d\u540d\u6a21\u5f0f\u5339\u914d\u8bb0\u5f55\u7ec4\u4ef6\uff0c\u4f46\u4e0d\u8bf4\u660e\u7ec4\u4ef6\u540d\u79f0\u6216\u7c7b\u578b\uff0c\u800c\u672a\u547d\u540d\u53d8\u91cf\u53ef\u4ee5\u521d\u59cb\u5316\u4f46\u4e0d\u80fd\u4f7f\u7528\u3002\u4e24\u8005\u90fd\u7528\u4e0b\u5212\u7ebf\u5b57\u7b26 _ \u8868\u793a\u3002\u8be5\u63d0\u6848\u65e8\u5728\u901a\u8fc7\u7701\u7565\u4e0d\u5fc5\u8981\u7684\u5d4c\u5957\u6a21\u5f0f\u6765\u63d0\u9ad8\u8bb0\u5f55\u6a21\u5f0f\u7684\u53ef\u8bfb\u6027\uff0c\u5e76\u901a\u8fc7\u8bc6\u522b\u5fc5\u987b\u58f0\u660e\u4f46\u4e0d\u4f1a\u4f7f\u7528\u7684\u53d8\u91cf\u6765\u63d0\u9ad8\u6240\u6709\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u3002<\/li>\n<li><strong>\u865a\u62df\u7ebf\u7a0b<\/strong>\n<p>\u865a\u62df\u7ebf\u7a0b\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7ebf\u7a0b\uff0c\u6709\u671b\u5927\u5e45\u51cf\u5c11\u7f16\u5199\u3001\u7ef4\u62a4\u548c\u89c2\u5bdf\u9ad8\u541e\u5410\u91cf\u5e76\u53d1\u5e94\u7528\u7a0b\u5e8f\u7684\u5de5\u4f5c\u91cf\u3002\u5728 JDK 21 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values\uff09\u662f\u6307\u5141\u8bb8\u5728\u7ebf\u7a0b\u5185\u548c\u7ebf\u7a0b\u95f4\u5171\u4eab\u4e0d\u53ef\u53d8\u6570\u636e\u3002\u4f5c\u7528\u57df\u503c\u5141\u8bb8\u5728\u5927\u578b\u7a0b\u5e8f\u7684\u7ec4\u4ef6\u4e4b\u95f4\u5b89\u5168\u5730\u5171\u4eab\u6570\u636e\uff0c\u800c\u65e0\u9700\u4f7f\u7528\u65b9\u6cd5\u53c2\u6570\u3002\u8fd9\u4e00\u63d0\u8bae\u5728 JDK 20 \u4e2d\u5f97\u5230\u4e86\u9a8c\u8bc1\u3002\u8be5\u8ba1\u5212\u7684\u76ee\u6807\u5305\u62ec\u6613\u7528\u6027\u3001\u53ef\u7406\u89e3\u6027\u3001\u5065\u58ee\u6027\u548c\u6027\u80fd\u3002<\/li>\n<li><strong>\u77e2\u91cf API\uff08\u7b2c\u516d\u4e2a\u5b75\u5316\u5668\uff09<\/strong>\n<p>\u8be5 API \u8868\u8fbe\u7684\u77e2\u91cf\u8ba1\u7b97\u53ef\u5728\u652f\u6301\u7684 CPU \u67b6\u6784\u4e0a\u53ef\u9760\u5730\u7f16\u8bd1\u4e3a\u6700\u4f73\u77e2\u91cf\u6307\u4ee4\uff0c\u4ece\u800c\u5b9e\u73b0\u4f18\u4e8e\u540c\u7b49\u6807\u91cf\u8ba1\u7b97\u7684\u6027\u80fd\u3002\u6b64\u524d\uff0c\u77e2\u91cf API \u5df2\u5728 JDK 16 \u81f3 JDK 20 \u4e2d\u5b75\u5316\u3002\u6700\u65b0\u7248\u672c\u5305\u62ec\u6027\u80fd\u589e\u5f3a\u548c\u9519\u8bef\u4fee\u590d\u3002\u8be5\u63d0\u6848\u7684\u76ee\u6807\u5305\u62ec\uff1a\u7b80\u6d01\u660e\u4e86\u3001\u4e0e\u5e73\u53f0\u65e0\u5173\u3001\u5728 x64 \u548c AArch64 \u4f53\u7cfb\u7ed3\u6784\u4e0a\u63d0\u4f9b\u53ef\u9760\u7684\u8fd0\u884c\u65f6\u7f16\u8bd1\u548c\u6027\u80fd\u3002<\/li>\n<li><strong>\u5f03\u7528\u00a0Windows 32 \u4f4d x86 \u7aef\u53e3<\/strong>\n<p>\u8fd9\u4e2a\u529f\u80fd\u66f4\u65b0\u7684\u76ee\u7684\u662f\u5728\u672a\u6765\u7684\u7248\u672c\u4e2d\u5220\u9664\u8be5\u7aef\u53e3\u3002\u8be5\u63d0\u6848\u65e8\u5728\u66f4\u65b0\u6784\u5efa\u7cfb\u7edf\uff0c\u4ee5\u4fbf\u5728\u5c1d\u8bd5\u4e3a 32 \u4f4d x86 Windows \u914d\u7f6e\u6784\u5efa\u65f6\uff0c\u53d1\u51fa\u9519\u8bef\u6d88\u606f\u3002\u8be5\u63d0\u6848\u6307\u51fa\uff0c\u652f\u6301 32 \u4f4d\u64cd\u4f5c\u7684\u6700\u540e\u4e00\u4e2a Windows \u64cd\u4f5c\u7cfb\u7edf\u7248\u672c\u4e4b Windows 10 \u5c06\u4e8e 2025 \u5e74 10 \u6708\u7ec8\u6b62\u751f\u547d\u5468\u671f\u3002<\/li>\n<li><strong>\u7981\u6b62\u4ee3\u7406\u7684\u52a8\u6001\u52a0\u8f7d<\/strong>\n<p>\u5f53\u4ee3\u7406\u88ab\u52a8\u6001\u52a0\u8f7d\u5230\u8fd0\u884c\u4e2d\u7684 JVM 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