{"id":34534,"date":"2020-05-25T14:40:13","date_gmt":"2020-05-25T06:40:13","guid":{"rendered":"https:\/\/blog.jetbrains.com\/cn\/?p=919"},"modified":"2020-07-06T22:52:19","modified_gmt":"2020-07-06T22:52:19","slug":"java-25","status":"publish","type":"post","link":"https:\/\/blog.jetbrains.com\/zh-hans\/2020\/05\/25\/java-25\/","title":{"rendered":"25 \u4e2a\u559c\u6b22 Java \u7684\u7406\u7531"},"content":{"rendered":"JetBrains \u559c\u6b22\u6240\u6709\u7f16\u7a0b\u8bed\u8a00\uff0c\u8fd8\u6709\u6240\u6709\u5f00\u53d1\u8005\uff01 2020 \u5e74 5 \u6708\uff0cJava \u5c06\u8fce\u6765 25 \u5c81\u751f\u65e5\uff01 \u56e0\u6b64\u6211\u4eec\u60f3\u505a\u70b9\u7279\u522b\u7684\u4e8b\u60c5\uff0c\u60f3\u60f3\u6211\u4eec\u559c\u6b22 Java \u548c JVM \u7684 25 \u4e2a\u5730\u65b9\u3002\r\n\r\n\r\n\r\n\r\n\r\n\u5411\u540e\u517c\u5bb9\u6027\r\nJava \u51e0\u4e4e\u662f\u552f\u4e00\u4e00\u79cd\u80fd\u591f\u5728\u73b0\u4ee3\u7248\u672c\u4e0a\u8fd0\u884c 25 \u5e74\u524d\u7684\u4ee3\u7801\u7684\u8bed\u8a00\u3002 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\u80fd\u591f\u4ee5\u6307\u5b9a\u3001\u53ef\u9884\u6d4b\u7684\u65b9\u5f0f\u8fd0\u884c\u3002 \u8fd9\u8ba9\u6211\u4eec\u53ef\u4ee5\u2026\r\n\u4e00\u6b21\u7f16\u5199\uff0c\u968f\u5904\u8fd0\u884c\r\nWORA \u662f Java \u7684\u7406\u5ff5\u4e4b\u4e00\uff0c\u8fd9\u4e00\u7406\u5ff5\u5982\u4eca\u770b\u8d77\u6765\u5f88\u6b63\u5e38\uff0c\u4ee5\u81f4\u4e8e\u6211\u4eec\u53ef\u80fd\u65e0\u6cd5\u610f\u8bc6\u5230\u5b83\u5f53\u521d\u7684\u5f00\u62d3\u6027\u3002 \u6211\u66fe\u5728\u4e00\u5bb6\u5f88\u5927\u7684\u516c\u53f8\u5de5\u4f5c\uff0c\u4ed6\u4eec\u5728 2002 \u5e74\u4ece\u4e4b\u524d\u7684\u6280\u672f\u5806\u6808\u5207\u6362\u5230 Java\uff0c\u4ed6\u4eec\u6709\u5f88\u591a\u4e0d\u540c\u7684\u786c\u4ef6\u3002\u80fd\u591f\u5728\u8fd9\u4e9b\u786c\u4ef6\u4e0a\u8fd0\u884c\u65b0\u7684 Java \u5e94\u7528\u7a0b\u5e8f\uff0c\u800c\u4e0d\u7528\u4e3a\u5e94\u7528\u7a0b\u5e8f\u8d2d\u4e70\u7279\u5b9a\u7684\u786c\u4ef6\u662f\u4ed6\u4eec\u5c06\u6240\u6709\u5f00\u53d1\u8f6c\u79fb\u5230 Java 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\u5f00\u53d1\u8005\u6709\u7528\u6216\u5f00\u53d1\u8005\u611f\u5174\u8da3\u7684\u4e1c\u897f\u800c\u4e3a\u4eba\u6240\u77e5\u3002 Java \u62e5\u6709\u4e00\u4e2a\u5de8\u5927\u7684\u5f00\u6e90\u793e\u533a\uff0c\u5305\u62ec\u901a\u8fc7 OpenJDK \u5f00\u6e90\u7684 JDK \u81ea\u8eab\u3002 Java \u793e\u533a\u91cd\u89c6\u5b66\u4e60\u3001\u6559\u6388\u548c\u6301\u7eed\u6539\u8fdb\uff0c\u5173\u5fc3\u6807\u51c6\u548c\u201c\u6700\u4f73\u5b9e\u8df5\u201d\uff0c\u5e76\u5bf9\u5982\u4f55\u5728\u771f\u5b9e\u73af\u5883\u4e2d\u5e94\u7528\u8fd9\u4e9b\u975e\u5e38\u52a1\u5b9e\u3002\r\n\u4eba\u5458\r\n\u793e\u533a\u81ea\u7136\u662f\u7531\u4eba\u7ec4\u6210\u7684\uff0c\u4f46\u662f\u5f53\u6211\u95ee\u5f00\u53d1\u8005\u4ed6\u4eec\u6700\u770b\u91cd Java \u7684\u4ec0\u4e48\u65f6\uff0c\u8bb8\u591a\u4eba\u90fd\u660e\u786e\u63d0\u5230 Java \u9886\u57df\u5bf9\u4ed6\u4eec\u4ea7\u751f\u5f71\u54cd\u7684\u4e2a\u4eba\u3002 \u5176\u4e2d\u65e2\u5305\u62ec\u540c\u4e8b\u548c\u6559\u5e08\uff0c\u4e5f\u5305\u62ec\u50cf Brian Goetz\u3001Angie Jones\u3001Georges Saab\u3001Mala Gupta \u548c Venkat Subramaniam \u8fd9\u6837\u7684\u5927\u5496\u3002 \u4e00\u4e9b\u4eba\u751a\u81f3\u63d0\u5230\u4e86\u6211\uff08Trisha Gee\uff09\u3002 \u5c31\u6211\u4e2a\u4eba\u6765\u8bf4\uff0c\u6211\u4f7f\u7528 Java \u662f\u56e0\u4e3a\u6211\u5728\u5927\u5b66\u5b66\u4e60\u8fd9\u79cd\u8bed\u8a00\u5e76\u4e14\u6709\u5f88\u591a\u5de5\u4f5c\u673a\u4f1a\uff0c\u4f46\u6211\u4e00\u76f4\u575a\u6301\u4e0b\u6765\u662f\u56e0\u4e3a\uff0c\u6211\u559c\u6b22 Java \u7528\u6237\u4ee5\u53ca\u4ed6\u4eec\u7ed9\u6211\u7684\u5e2e\u52a9\u548c\u652f\u6301\u3002\r\nJavadoc \u4e0e\u6587\u6863\r\nJava \u901a\u8fc7 Javadoc \u4f7f API \u6587\u6863\u6210\u4e3a\u8bed\u8a00\u7684\u4e3b\u8981\u90e8\u5206\u3002 \u4e09\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u6ce8\u91ca\uff08Javadoc\u3001\u5757\u548c\u884c\uff09\u6e05\u695a\u5730\u8bf4\u660e\u4e86\u5f00\u53d1\u8005\u7559\u4e0b\u7684\u8bf4\u660e\u7c7b\u578b\u3002 Javadoc \u7279\u522b\u9f13\u52b1\u5f00\u53d1\u8005\u4e3a\u8c03\u7528\u65b9\u6cd5\u6216\u8005\u4f7f\u7528\u7c7b\u6216\u5305\u7684\u5176\u4ed6\u5f00\u53d1\u8005\u7559\u4e0b\u6709\u7528\u7684\u6587\u6863\u3002 \u5982\u679c\u5f00\u53d1\u8005\u65e0\u6cd5\u627e\u5230\u6709\u5173\u5e93\u6216\u4ee3\u7801\u6bb5\u7684\u8be6\u7ec6\u6559\u7a0b\u4fe1\u606f\uff0c\u901a\u5e38\u90fd\u4f1a\u6709 Javadoc \u53ef\u4ee5\u4e3a\u4ed6\u4eec\u6307\u70b9\u8ff7\u6d25\u3002\r\n\r\n\u6b64\u5916\uff0cJava \u751f\u6001\u7cfb\u7edf\u4e00\u822c\u53ef\u4ee5\u83b7\u5f97\uff08\u548c\u63d0\u4f9b\uff09\u4f18\u8d28\u6587\u6863\u3002 \u9f13\u52b1\u5f00\u6e90\u9879\u76ee\u7684\u6f5c\u5728\u63d0\u4ea4\u8005\u63d0\u4ea4 Javadoc \u6ce8\u91ca\u6216\u5176\u4ed6\u6587\u6863\u7684\u62c9\u53d6\u8bf7\u6c42\uff0c\u5168\u4e16\u754c\u7684\u5f00\u53d1\u8005\u90fd\u53ef\u4ee5\u5728 StackOverflow \u4e0a\u63d0\u51fa\u548c\u56de\u7b54\u95ee\u9898\uff0c\u6216\u8005\u64b0\u5199\u6709\u5173\u7279\u5b9a\u95ee\u9898\u89e3\u51b3\u65b9\u6848\u7684\u535a\u6587\u3002\r\n\u5f00\u6e90\r\n\u4e0d\u4ec5 Java \u793e\u533a\u5f88\u65e9\u5c31\u5f00\u6e90\uff0cJDK \u81ea\u8eab\u73b0\u5728\u4e5f\u901a\u8fc7 OpenJDK \u5f00\u6e90\u3002 \u5f00\u6e90\u8ba9\u591a\u4e2a\u4f9b\u5e94\u5546\u548c\u4e2a\u4eba\u53ef\u4ee5\u66f4\u8f7b\u677e\u5730\u53c2\u4e0e\u548c\u534f\u4f5c\u3002 \u80fd\u591f\u67e5\u770b Java \u81ea\u8eab\u7684\u4ee3\u7801\u4e5f\u5f88\u6709\u610f\u601d\u3002 \u5f00\u6e90\u4ee3\u7801\u4e5f\u4e3a\u50cf\u6211\u4eec\u4e00\u6837\u7684\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u51fa\u8272\u7684\u673a\u4f1a\uff0c\u8ba9\u5927\u5bb6\u53ef\u4ee5\u4ece\u52aa\u529b\u601d\u8003\u548c\u89e3\u51b3\u590d\u6742\u95ee\u9898\u7684\u4eba\u90a3\u91cc\u5b66\u4e60\u3002\r\n\u514d\u8d39\r\nJava \u5e73\u53f0\u548c Java \u751f\u6001\u7cfb\u7edf\u4e2d\u4f7f\u7528\u7684\u8bb8\u591a\u6700\u53d7\u6b22\u8fce\u7684\u5de5\u5177\u90fd\u4e0d\u9700\u8981\u5f00\u53d1\u8005\uff08\u751a\u81f3\u662f\u76c8\u5229\u7ec4\u7ec7\uff09\u652f\u4ed8\u4efb\u4f55\u8d39\u7528\u3002 \u5373\u4f7f\u5728 Oracle \u4e8e Java 11 \u4e2d\u66f4\u6539\u4e86\u8bb8\u53ef\u548c\u652f\u6301\u540e\uff0c\u4ed6\u4eec\uff08\u4ee5\u53ca\u8bb8\u591a\u5176\u4ed6\u4f9b\u5e94\u5546\uff09\u4ecd\u63d0\u4f9b\u4e86\u5728\u751f\u4ea7\u4e2d\u514d\u8d39\u4f7f\u7528\u8fd9\u79cd\u8bed\u8a00\u7684\u65b9\u5f0f\u3002 \u672c\u6587\u5df2\u7ecf\u63d0\u5230\u7684\u5f00\u6e90\u9879\u76ee\u3001\u6784\u5efa\u5de5\u5177\u548c IDE \u5168\u90fd\u514d\u8d39\u6216\u8005\u63d0\u4f9b\u514d\u8d39\u9009\u9879\u3002 \u8fd9\u4f7f Java \u5bf9\u521a\u5f00\u59cb\u7f16\u7a0b\u7684\u5f00\u53d1\u8005\uff0c\u4ee5\u53ca\u5728\u5f00\u53d1\u8f6f\u4ef6\u65f6\u9700\u8981\u63a7\u5236\u9884\u7b97\u7684\u5404\u79cd\u89c4\u6a21\u7684\u7ec4\u7ec7\u6765\u8bf4\u975e\u5e38\u6709\u5438\u5f15\u529b\u3002\r\n\u9762\u5411\u5bf9\u8c61\r\n\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u5e76\u4e0d\u662f\u552f\u4e00\u9009\u62e9\uff0c\u6bcf\u79cd\u8303\u4f8b\u90fd\u6709\u5176\u4f18\u70b9\u548c\u7f3a\u70b9\u3002 Java \u4ece\u4e00\u5f00\u59cb\u5c31\u8bbe\u8ba1\u4e3a\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u8bed\u8a00\uff0c\u9762\u5411\u5bf9\u8c61\u7684\u8bb8\u591a\u8bbe\u8ba1\u6a21\u5f0f\u793a\u4f8b\u548c\u5176\u4ed6\u6700\u4f73\u7f16\u7a0b\u5b9e\u8df5\u90fd\u4ee5 Java \u6f14\u793a\u3002 \u5982\u679c\u60a8\u9700\u8981\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u8bed\u8a00\uff0cJava \u5e94\u5728\u60a8\u7684\u9009\u62e9\u6e05\u5355\u4e2d\u4f4d\u5c45\u524d\u5217\u3002\r\n\u6f14\u5316\u4e0e\u9002\u5e94\r\nJava \u8fc7\u53bb\u662f\u5e76\u4e14\u4ecd\u7136\u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u8bed\u8a00\u3002 \u4f46\u5b83\u4ecd\u6210\u529f\u5730\u91c7\u7528\u4e86\u51fd\u6570\u7f16\u7a0b\u4e2d\u7684\u67d0\u4e9b\u6982\u5ff5\uff08\u4f8b\u5982 lambda \u8868\u8fbe\u5f0f\u548c\u4e0d\u53ef\u53d8\u6570\u636e\u7ed3\u6784\uff09\uff0c\u5e76\u4f7f\u5b83\u4eec\u5728\u9762\u5411\u5bf9\u8c61\u7684\u8303\u4f8b\u4e2d\u5f88\u597d\u5730\u8fd0\u884c\u3002 \u7c7b\u578b\u63a8\u7406\uff08\u4f8b\u5982 var\uff09\u8ba9\u6211\u4eec\u4ecd\u53ef\u4ee5\u5229\u7528\u9759\u6001\u7c7b\u578b\u8bed\u8a00\u7684\u4f18\u52bf\uff0c\u4f46\u6837\u677f\u4ee3\u7801\u51cf\u5c11\u3002 \u8ba1\u7b97\u673a\u79d1\u5b66\u4ecd\u662f\u4e00\u95e8\u76f8\u5bf9\u5e74\u8f7b\u7684\u5b66\u79d1\uff0c\u6211\u4eec\u5b66\u4e60\u7684\u65b0\u4e1c\u897f\u53ef\u4ee5\u5e94\u7528\u5230\u73b0\u6709\u5de5\u5177\u4e2d\u3002 Java\uff08\u8bed\u8a00\u548c\u6574\u4e2a\u751f\u6001\u7cfb\u7edf\uff09\u4ecd\u5728\u6309\u7167\u65b0\u8d8b\u52bf\u3001\u65b0\u7684\u201c\u6700\u4f73\u5b9e\u8df5\u201d\uff0c\u4ee5\u53ca\u5404\u65b9\u9762\u5728\u73b0\u5b9e\u4e16\u754c\u4e2d\u7684\u8fd0\u884c\u6548\u679c\u8fdb\u884c\u6f14\u5316\u3002\r\n\r\nJava \u4e5f\u4f1a\u5229\u7528\u5176\u4ed6 JVM \u8bed\u8a00\u4e2d\u7684\u8bed\u6cd5\u548c\u7406\u5ff5\u5224\u65ad\u7ecf\u5178 Java \u9886\u57df\u4e2d\u7684\u53ef\u53d6\u548c\u4e0d\u8db3\u4e4b\u5904\u3002 \u5373\u4f7f\u662f Java \u7528\u4e8e\u6f14\u5316\u548c\u53d1\u5c55\u7684\u8fc7\u7a0b\u548c\u5de5\u5177\uff08\u4f8b\u5982 JCP \u548c OpenJDK\uff09\uff0c\u4e5f\u5728\u8fdb\u884c\u81ea\u6211\u9002\u5e94\uff0c\u4ee5\u5728\u8fd9\u4e2a\u6301\u7eed\u7684\u6f14\u5316\u8fc7\u7a0b\u4e2d\u4e0e\u65f6\u4ff1\u8fdb\u3002 \u8fd9\u79cd\u6f14\u5316\u548c\u9002\u5e94\u662f Java \u7aed\u529b\u5b9e\u73b0\u7684\u8c28\u614e\u5e73\u8861\u7684\u4e00\u90e8\u5206\u3002\r\n\u6ce8\u91cd\u53ef\u8bfb\u6027\r\nJava \u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u4e00\u822c\u6bd4\u8f83\u5f3a\uff0c\u5373\u4f7f\u5bf9\u4e8e\u975e Java \u7f16\u7a0b\u8005\u6765\u8bf4\u4e5f\u662f\u5982\u6b64\u3002 \u8fd9\u79cd\u8bed\u8a00\u503e\u5411\u4e8e\u66f4\u8be6\u7ec6\u800c\u4e0d\u662f\u8fc7\u4e8e\u7b80\u6d01\uff0c\u8fd9\u8ba9\u5f00\u53d1\u8005\u5728\u9605\u8bfb\u65f6\u53ef\u4ee5\u66f4\u8f7b\u677e\u5730\u8ffd\u6839\u6eaf\u6e90\u3002 Java \u5f00\u53d1\u8005\u5c1a\u672a\u5b9e\u73b0\u8fd0\u7b97\u7b26\u91cd\u8f7d\u7b49\u529f\u80fd\uff0c\u56e0\u4e3a\u4ed6\u4eec\u8ba4\u4e3a\u91cd\u8981\u7684\u662f\u4e0d\u88ab\u610f\u5916\u7684\u81ea\u5b9a\u4e49\u884c\u4e3a\u6240\u56f0\u6270\u3002 \u8bed\u8a00\u548c\u6846\u67b6\u503e\u5411\u4e8e\u907f\u514d\u201c\u9b54\u6cd5\u201d\uff0c\u4f46\u4e00\u4e9b\u6846\u67b6\u5c06\u4f7f\u7528\u60ef\u4f8b\u4f18\u4e8e\u914d\u7f6e\u7b49\u8303\u4f8b\uff0c\u800c\u5f00\u53d1\u8005\u65e0\u9700\u8fd9\u6837\u505a\uff0c\u4e0d\u8fc7\uff0c\u80af\u5b9a\u4f1a\u6452\u5f03\u8fdb\u884c\u5927\u91cf\u5e26\u6ce8\u89e3\u7684 AOP\uff0c\u8f6c\u5411\u4e3a\u6587\u6863\u548c\u9759\u6001\u5206\u6790\u68c0\u67e5\u4f7f\u7528\u6ce8\u89e3\u3002 \u793e\u533a\u548c\u751f\u6001\u7cfb\u7edf\u503e\u5411\u4e8e\u559c\u6b22\u6807\u51c6\u548c\u201c\u6700\u4f73\u5b9e\u8df5\u201d\uff0c\u56e0\u6b64\uff0c\u5373\u4f7f\u5728\u622a\u7136\u4e0d\u540c\u7684\u9879\u76ee\u4e2d\uff0cJava \u4ee3\u7801\u901a\u5e38\u4e5f\u9075\u5faa\u76f8\u4f3c\u7684\u89c4\u5219\u3002\r\n\u8bed\u8a00\u529f\u80fd\r\n\u6211\u4eec\u4ecb\u7ecd\u4e86\u559c\u6b22 Java \u7684 23 \u4e2a\u65b9\u9762\uff0c\u4f46\u8fd8\u6ca1\u6709\u63d0\u5230\u4e00\u9879\u529f\u80fd\uff01 \u8bf4\u5b9e\u8bdd\uff0c\u5c06\u6211\u4eec\u81ea\u5df1\u9650\u5236\u4e3a\u4ec5\u4ec5 25 \u4e2a\u529f\u80fd\u4f3c\u4e4e\u6781\u5176\u56f0\u96be\uff0c\u6211\u4eec\u559c\u6b22 Java \u7684\u8bb8\u591a\u65b9\u9762\u4e5f\u4e0d\u603b\u662f\u8ddf\u8bed\u6cd5\u6216\u529f\u80fd\u6709\u5173\u3002 \u6211\u4eec\u60f3\u7279\u522b\u8bf4\u4e00\u4e0b\u5f00\u53d1\u8005\u6700\u559c\u6b22\u7684\u4e00\u4e9b\u529f\u80fd\uff1a\r\n\r\n    Collections API\uff1a\u5b83\u5df2\u4f34\u968f\u6211\u4eec\u5f88\u957f\u65f6\u95f4\u5e76\u4e14\u5f88\u9002\u5408\u6211\u4eec\uff01\r\n    \u4fbf\u5229\u7684\u96c6\u5408\u5de5\u5382\u65b9\u6cd5\uff1a\u8ba9\u521b\u5efa\u4e0d\u53ef\u4fee\u6539\u7684\u96c6\u5408\u66f4\u52a0\u5bb9\u6613\r\n    Streams API\uff1aCollections API \u4e00\u4e2a\u975e\u5e38\u597d\u7684\u8865\u5145\uff0c\u4ece Java 8 \u4ee5\u6765\u4e00\u76f4\u5728\u6f14\u5316\u3002 \u5e76\u884c\u6d41\u589e\u52a0\u4e86\u4e00\u79cd\u5229\u7528\u73b0\u4ee3\u786c\u4ef6\u7684\u65b0\u65b9\u5f0f\u3002\r\n    Lambda \u8868\u8fbe\u5f0f\uff1a\u4e0e Streams API \u7ed3\u5408\u65f6\u7279\u522b\u6709\u7528\uff0c\u5355\u72ec\u4f7f\u7528\u65f6\u975e\u5e38\u65b9\u4fbf\u3002\r\n    Optional\uff1a\u8868\u8fbe\u67d0\u4e2a\u65b9\u6cd5\u53ef\u80fd\u4e0d\u4f1a\u662f\u5f88\u6709\u7528\uff08\u5e76\u963b\u6b62\u6211\u4eec\u9632\u8303 NullPointerException\uff01\uff09\u7684\u51fa\u8272\u65b9\u5f0f\u3002 \u975e\u5e38\u6b23\u6170\u770b\u5230 Optional \u81ea Java 8 \u4ee5\u6765\u7684\u6bcf\u9879\u6539\u8fdb\u3002\r\n    java.time\uff1a\u7528\u4e8e\u5904\u7406\u65e5\u671f\u548c\u65f6\u95f4\u7684\u6700\u65b0 API \u662f\u4e00\u9879\u5907\u53d7\u6b22\u8fce\u7684\u6539\u8fdb\r\n    \u68c0\u67e5\u5f02\u5e38\uff1a\u4eba\u4eec\u5728\u68c0\u67e5\u5f02\u5e38\u548c\u8fd0\u884c\u65f6\u5f02\u5e38\u4e0a\u4ea7\u751f\u5206\u6b67\uff0c\u4f46\u68c0\u67e5\u5f02\u5e38\u9002\u5408\u5e0c\u671b\u4f7f\u7528\u5b83\u4eec\u7684\u7528\u6237\u3002\r\n    \u6ce8\u89e3\uff1a\u6ce8\u89e3\u7c7b\u4f3c\u4e8e\u7f16\u8bd1\u5668\u53ef\u4ee5\u68c0\u67e5\u7684\u6587\u6863\uff0c\u6216\u8005\u53ef\u4ee5\u5e2e\u52a9\u6846\u67b6\u89e3\u51b3\u590d\u6742\u95ee\u9898\u7684\u6ce8\u91ca\u3002\r\n    JShell\uff1a\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u5728 REPL \u4e2d\u8bd5\u9a8c Java\r\n    var\uff1a\u5982\u679c\u5408\u7406\u4f7f\u7528\uff0c\u7c7b\u578b\u63a8\u7406\u6709\u52a9\u4e8e\u51cf\u5c11\u4ee3\u7801\u566a\u58f0\r\n    \u8bbf\u95ee\u4fee\u9970\u7b26\u548c\u6a21\u5757\u5316\uff1aJava \u8ba9\u5f00\u53d1\u8005\u53ef\u4ee5\u8f7b\u677e\u5730\uff08\u4ece Java 9 \u4ee5\u6765\u66f4\u662f\u5982\u6b64\uff09\u660e\u786e\u4ee3\u7801\u53ef\u4ee5\u8bbf\u95ee\u7684\u5b57\u6bb5\u3001\u65b9\u6cd5\u3001\u7c7b\u548c\u6a21\u5757\u3002\r\n    switch \u8868\u8fbe\u5f0f\uff1a\u73b0\u5728\u5982\u679c\u4f7f\u7528 switch\uff0c\u5b83\u4f1a\u5f88\u6f02\u4eae\uff01\r\n    \u6709\u7528\u7684 NullPointerException\uff1a\u8c01\u4e0d\u559c\u6b22\u597d\u7684 NullPointerException \u5462\uff1f \u73b0\u5728\uff0c\u5f02\u5e38\u53ef\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u6709\u5173 null \u5bf9\u8c61\u7684\u66f4\u591a\u6709\u7528\u4fe1\u606f\u3002\r\n    \u9884\u89c8\u529f\u80fd\uff1a\u6211\u4eec\u559c\u6b22\u9884\u89c8\u529f\u80fd\uff01 \u6211\u4eec\u5bf9 Records\u3001instanceof \u7684\u6a21\u5f0f\u5339\u914d\u548c\u6587\u672c\u5757\u975e\u5e38\u5174\u594b\u3002\r\n\r\n\u672a\u6765\r\n\u6211\u4eec\u6bcf\u516d\u4e2a\u6708\u5c31\u4f1a\u83b7\u5f97\u65b0\u529f\u80fd\uff0c\u6bcf\u4e2a\u957f\u671f\u652f\u6301\u7248\u672c\u901a\u5e38\u5f00\u7bb1\u5373\u53ef\u4e3a\u8fd0\u884c\u7684\u4efb\u4f55\u5e94\u7528\u7a0b\u5e8f\u63d0\u4f9b\u66f4\u597d\u7684\u6027\u80fd\u3002 Java 15\uff082020 \u5e74 9 \u6708\u53d1\u5e03\uff09\u5e94\u5177\u6709\u4ee5\u4e0b\u65b0\u529f\u80fd\uff1a\u9690\u85cf\u7c7b\u3001\u6587\u672c\u5757\uff08\u7ed3\u675f\u9884\u89c8\uff09\u3001\u66f4\u65b0\u7684 Records \u9884\u89c8\u3001instanceof \u7684\u6a21\u5f0f\u5339\u914d\uff0c\u4ee5\u53ca\u5bc6\u5c01\u7c7b\u3002\r\n\r\n\u672a\u6765\uff0c\u6211\u4eec\u8fd8\u5e0c\u671b\u770b\u5230\u4ee5\u4e0b\u53d8\u5316\uff1a\u6613\u4e8e\u4f7f\u7528\uff0c\u4e0e Project Loom \u7684\u8f7b\u578b\u5e76\u53d1\uff0c\u6765\u81ea Valhalla \u9879\u76ee\u7684\u5185\u8054\u7c7b\u578b\uff0c\u6765\u81ea Amber \u9879\u76ee\u7684\u66f4\u591a\u8bed\u8a00\u53d8\u5316\uff08\u4f8b\u5982 lambda \u9057\u7559\uff09\uff0cPanama \u9879\u76ee\u5c06\u4f7f\u5f00\u53d1\u8005\u53ef\u4ee5\u66f4\u8f7b\u677e\u5730\u8bbf\u95ee\u5916\u90e8 API\uff0cLeydon \u9879\u76ee\u7f29\u77ed\u542f\u52a8\u65f6\u95f4\uff0c\u5404\u79cd\u5783\u573e\u56de\u6536\u5668\u7684\u66f4\u591a\u6539\u8fdb\uff0c\u7b49\u7b49\u3002\r\n\r\nJava \u7684\u672a\u6765\u5149\u660e\u65e0\u9650\uff01","protected":false},"excerpt":{"rendered":"JetBrains \u559c\u6b22\u6240\u6709\u7f16\u7a0b\u8bed\u8a00\uff0c\u8fd8\u6709\u6240\u6709\u5f00\u53d1\u8005\uff01 2020 \u5e74 5 \u6708\uff0cJava \u5c06\u8fce\u6765 25 \u5c81\u751f\u65e5\uff01 \u56e0\u6b64\u6211\u4eec\u60f3\u505a\u70b9\u7279\u522b\u7684\u4e8b\u60c5\uff0c\u60f3\u60f3\u6211\u4eec\u559c\u6b22 Java \u548c JVM \u7684 25 \u4e2a\u5730\u65b9\u3002\u5411\u540e\u517c\u5bb9\u6027Java \u51e0\u4e4e\u662f\u552f\u4e00\u4e00\u79cd\u80fd\u591f\u5728\u73b0\u4ee3\u7248\u672c\u4e0a\u8fd0\u884c 25 \u5e74\u524d\u7684\u4ee3\u7801\u7684\u8bed\u8a00\u3002 \u8fd9\u79cd\u8bed\u8a00\u7684\u5f00\u53d1\u8005\u975e\u5e38\u91cd\u89c6\u5411\u540e\u517c\u5bb9\u6027\uff0c\u7531\u4e8e\u8fd9\u4e00\u70b9\uff0c\u8bb8\u591a\u7ec4\u7ec7\u4e50\u610f\u5c06 Java 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