{"id":380,"date":"2023-11-18T05:49:39","date_gmt":"2022-11-06T23:02:36","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java-14-%e7%89%b9%e6%80%a7\/"},"modified":"2025-08-02T03:08:20","modified_gmt":"2025-08-01T19:08:20","slug":"java-14-%e7%89%b9%e6%80%a7","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-14-%e7%89%b9%e6%80%a7\/","title":{"rendered":"\u5168\u9762\u89e3\u6790Java 14\u65b0\u7279\u6027\uff1a\u5f00\u53d1\u8005\u5fc5\u77e5\u7684\u8bed\u8a00\u6539\u8fdb"},"content":{"rendered":"<p>\u6309\u7167\u516d\u4e2a\u6708\u7684\u53d1\u5e03\u5468\u671f\u4f20\u7edf\uff0c\u7ee72019\u5e749\u670817\u65e5\u53d1\u5e03Java 13\u4e4b\u540e\uff0cJava 14\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u975eLTS\uff08\u957f\u671f\u652f\u6301\uff09\u7248\u672c\uff0c\u8ba1\u5212\u4e8e2020\u5e743\u670817\u65e5\u53d1\u5e03\u3002<\/p>\n<h2>Java 14\u7279\u6027<\/h2>\n<p>\u4ee5\u4e0b\u662fJava 14\u529f\u80fd\u7684\u5217\u8868\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>Switch\u8868\u8fbe\u5f0f\uff08\u6807\u51c6\uff09- JEP 361<\/li>\n<li>instanceof\u7684\u6a21\u5f0f\u5339\u914d\uff08\u9884\u89c8\uff09- JEP 305<\/li>\n<li>\u6709\u7528\u7684NullPointerExceptions &#8211; JEP 358<\/li>\n<li>\u8bb0\u5f55\u7c7b\uff08\u9884\u89c8\uff09- JEP 359<\/li>\n<li>\u6587\u672c\u5757\uff08\u7b2c\u4e8c\u6b21\u9884\u89c8\uff09- JEP 368<\/li>\n<li>\u6253\u5305\u5de5\u5177\uff08\u5b75\u5316\u5668\uff09- JEP 343<\/li>\n<li>G1\u7684NUMA\u611f\u77e5\u5185\u5b58\u5206\u914d &#8211; JEP 345<\/li>\n<li>JFR\u4e8b\u4ef6\u6d41 &#8211; JEP 349<\/li>\n<li>\u975e\u6613\u5931\u6027\u6620\u5c04\u5b57\u8282\u7f13\u51b2\u533a &#8211; JEP 352<\/li>\n<li>macOS\u4e0a\u7684ZGC &#8211; JEP 364<\/li>\n<li>Windows\u4e0a\u7684ZGC &#8211; JEP 365<\/li>\n<li>\u5916\u90e8\u5185\u5b58\u8bbf\u95eeAPI\uff08\u5b75\u5316\u5668\uff09- JEP 370<\/li>\n<\/ul>\n<h2>\u5728Mac OS\u4e0a\u5b89\u88c5Java 14<\/h2>\n<p>\u8bbe\u7f6e\u6b65\u9aa4\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u8981\u5f00\u59cb\u4f7f\u7528Java 14\uff0c\u8bf7\u4ece\u6b64\u5904\u4e0b\u8f7dJDK\u3002<\/li>\n<li>\u5c06tar\u6587\u4ef6\u590d\u5236\u5e76\u89e3\u538b\u5230\/Library\/Java\/JavaVirtualMachines\u76ee\u5f55\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code>$ <span class=\"token builtin class-name\">cd<\/span> \/Library\/Java\/JavaVirtualMachines  # \u8fdb\u5165Java\u865a\u62df\u673a\u5b89\u88c5\u76ee\u5f55\r\n\r\n$ <span class=\"token function\">sudo<\/span> <span class=\"token function\">cp<\/span> ~\/Downloads\/openjdk-14_osx-x64_bin.tar.gz \/Library\/Java\/JavaVirtualMachines  # \u590d\u5236\u4e0b\u8f7d\u7684\u6587\u4ef6\r\n\r\n$ <span class=\"token function\">sudo<\/span> <span class=\"token function\">tar<\/span> xzf openjdk-14_osx-x64_bin.tar.gz  # \u89e3\u538b\u6587\u4ef6\r\n\r\n$ <span class=\"token function\">sudo<\/span> <span class=\"token function\">rm<\/span> openjdk-14_osx-x64_bin.tar.gz  # \u5220\u9664\u538b\u7f29\u5305\r\n<\/code><\/pre>\n<p>\u5b8c\u6210\u4e0a\u8ff0\u6b65\u9aa4\u540e\uff0c\u4f7f\u7528\u4efb\u4f55\u6587\u672c\u7f16\u8f91\u5668\u6253\u5f00bash_profile\u6587\u4ef6\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528vim ~\/.bash_profile\u547d\u4ee4\u6253\u5f00\u3002\u5c06Java 14\u7684\u8def\u5f84\u8bbe\u7f6e\u4e3aJAVA_HOME\uff0c\u4fdd\u5b58\u66f4\u6539\uff0c\u5e76\u6267\u884csource ~\/.bash_profile\u547d\u4ee4\u4ee5\u4f7f\u66f4\u6539\u751f\u6548\u3002<\/p>\n<pre class=\"post-pre\"><code>export JAVA_HOME=\/Library\/Java\/JavaVirtualMachines\/jdk-14.jdk\/Contents\/Home  # \u8bbe\u7f6eJava 14\u7684\u73af\u5883\u53d8\u91cf\r\n<\/code><\/pre>\n<p>\u6700\u540e\uff0c\u60a8\u5df2\u7ecf\u51c6\u5907\u597d\u4f7f\u7528Java 14\u7f16\u8bd1\u548c\u8fd0\u884c\u7a0b\u5e8f\u3002\u6211\u4eec\u5c06\u4f7f\u7528JShell\uff0c\u8fd9\u662f\u4e00\u4e2a\u4ea4\u4e92\u5f0f\u7684REPL\uff08\u8bfb\u53d6-\u8bc4\u4f30-\u6253\u5370\u5faa\u73af\uff09\u547d\u4ee4\u884c\u5de5\u5177\uff0c\u7528\u4e8e\u5feb\u901f\u6d4b\u8bd5Java 14\u7684\u65b0\u529f\u80fd\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cJava 14\u4e2d\u53d1\u5e03\u7684\u8bb8\u591a\u529f\u80fd\u90fd\u5904\u4e8e\u9884\u89c8\u9636\u6bb5\u3002\u8fd9\u610f\u5473\u7740\u867d\u7136\u5b83\u4eec\u73b0\u5728\u53ef\u4ee5\u5b8c\u5168\u4f7f\u7528\uff0c\u4f46\u5c06\u6765\u53ef\u80fd\u4f1a\u8fdb\u884c\u4fee\u6539\u3002\u6709\u4e9b\u529f\u80fd\u53ef\u80fd\u4f1a\u6210\u4e3a\u6807\u51c6\uff0c\u6216\u8005\u5728\u4e0b\u4e00\u4e2a\u53d1\u5e03\u5468\u671f\u4e2d\u88ab\u79fb\u9664\u3002\u4e3a\u4e86\u6d4b\u8bd5\u9884\u89c8\u529f\u80fd\uff0c\u60a8\u9700\u8981\u5728\u8fd0\u884cJShell\u6216Java\u7a0b\u5e8f\u65f6\u663e\u5f0f\u5730\u8bbe\u7f6e&#8211;enable-preview\u53c2\u6570\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre class=\"post-pre\"><code>jshell --enable-preview  # \u542f\u7528\u9884\u89c8\u529f\u80fd\u7684JShell\r\n\r\njavac <span class=\"token parameter variable\">--release<\/span> <span class=\"token number\">14<\/span> --enable-preview Author.java  # \u4f7f\u7528Java 14\u5e76\u542f\u7528\u9884\u89c8\u529f\u80fd\u7f16\u8bd1Author.java\u6587\u4ef6\r\n<\/code><\/pre>\n<p>\u5728\u63a5\u4e0b\u6765\u7684\u51e0\u4e2a\u90e8\u5206\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u4e00\u4e9b\u8bed\u8a00\u548cJVM\u7684\u7279\u6027\u3002<\/p>\n<p>\u63a8\u8350\u9605\u8bfb\uff1a<a href=\"#\">\u5728Linux\u4e0a\u5b89\u88c5Java 14<\/a><\/p>\n<h2>1. Switch\u8868\u8fbe\u5f0f<\/h2>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aJava 14 \u7279\u6027\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5728\u8fc7\u53bb\u7684\u4e24\u4e2a\u7248\u672c\u4e2d\uff0c\u5373Java 12\u548cJava 13\u4e2d\uff0cSwitch\u8868\u8fbe\u5f0f\u4e00\u76f4\u4f5c\u4e3a\u9884\u89c8\u529f\u80fd\uff0c\u73b0\u5728\u5b83\u4eec\u5df2\u7ecf\u5728Java 14\u4e2d\u6210\u4e3a\u4e86\u6807\u51c6\u7279\u6027\u3002<\/p>\n<ul class=\"post-ul\">\n<li>Java 12\u4e3aswitch\u8868\u8fbe\u5f0f\u5f15\u5165\u4e86lambda\u8bed\u6cd5\uff0c\u4ece\u800c\u5141\u8bb8\u6a21\u5f0f\u5339\u914d\u4f7f\u7528\u591a\u4e2acase\u6807\u7b7e\uff0c\u5e76\u9632\u6b62\u5bfc\u81f4\u4ee3\u7801\u5197\u4f59\u7684fall-through\u73b0\u8c61\u3002\u5b83\u8fd8\u5f3a\u5236\u6267\u884c\u7a77\u5c3d\u6027\u68c0\u67e5\uff0c\u5982\u679c\u672a\u8986\u76d6\u6240\u6709\u8f93\u5165\u60c5\u51b5\uff0c\u5c06\u629b\u51fa\u7f16\u8bd1\u9519\u8bef\u3002<\/li>\n<li>Java 13\u4f5c\u4e3a\u7b2c\u4e8c\u6b21\u9884\u89c8\uff0c\u5f15\u5165\u4e86yield\u8bed\u53e5\u6765\u66ff\u4ee3break\uff0c\u7528\u4e8e\u4ece\u8868\u8fbe\u5f0f\u8fd4\u56de\u503c\u3002<\/li>\n<\/ul>\n<p>Java 14\u7ec8\u4e8e\u5c06\u8fd9\u4e9b\u529f\u80fd\u7eb3\u5165\u4e86\u6807\u51c6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token class-name\">String<\/span> result <span class=\"token operator\">=<\/span> <span class=\"token keyword\">switch<\/span> <span class=\"token punctuation\">(<\/span>day<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n            <span class=\"token keyword\">case<\/span> <span class=\"token string\">\"M\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"W\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"F\"<\/span> <span class=\"token operator\">-><\/span> <span class=\"token string\">\"\u5468\u4e00\u3001\u4e09\u3001\u4e94\"<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">case<\/span> <span class=\"token string\">\"T\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"TH\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"S\"<\/span> <span class=\"token operator\">-><\/span> <span class=\"token string\">\"\u5468\u4e8c\u3001\u56db\u3001\u516d\"<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token keyword\">default<\/span> <span class=\"token operator\">-><\/span> <span class=\"token punctuation\">{<\/span>\r\n                <span class=\"token keyword\">if<\/span><span class=\"token punctuation\">(<\/span>day<span class=\"token punctuation\">.<\/span><span class=\"token function\">isEmpty<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>\r\n                    <span class=\"token keyword\">yield<\/span> <span class=\"token string\">\"\u8bf7\u63d2\u5165\u6709\u6548\u7684\u65e5\u671f\u3002\"<\/span><span class=\"token punctuation\">;<\/span>\r\n                <span class=\"token keyword\">else<\/span>\r\n                    <span class=\"token keyword\">yield<\/span> <span class=\"token string\">\"\u770b\u8d77\u6765\u50cf\u662f\u5468\u65e5\u3002\"<\/span><span class=\"token punctuation\">;<\/span>\r\n            <span class=\"token punctuation\">}<\/span>\r\n\r\n        <span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<\/code><\/pre>\n<div>\n    <img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564855ca4b2f92e6c73082a\/19-0.png\" alt=\"Java 14 Switch\u8868\u8fbe\u5f0f\" \/><\/p>\n<p>\u6ce8\u610f\uff1ayield \u4e0d\u662f Java \u4e2d\u7684\u65b0\u5173\u952e\u5b57\uff0c\u5b83\u53ea\u662f\u5728 switch \u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\u3002<\/p>\n<\/div>\n<h2>2. instanceof\u5b9e\u4f8b\u7684\u6a21\u5f0f\u5339\u914d\uff08\u9884\u89c8\uff09<\/h2>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aJava 14 \u7279\u6027\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n<p>\u67e5\u770b\u4efb\u4f55Java\u5f00\u53d1\u4eba\u5458\u7684\u4ee3\u7801\u5e93\uff0c\u4f60\u4f1a\u770b\u5230\u4ee3\u7801\u4e2d\u5927\u91cf\u4f7f\u7528\u4e86instanceof\u6761\u4ef6\u5224\u65ad\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u4e00\u4e2ainstanceof\u6761\u4ef6\u68c0\u67e5\u901a\u5e38\u4f1a\u8ddf\u968f\u4e00\u4e2a\u7c7b\u578b\u8f6c\u6362\u3002<\/p>\n<p>Java 14\u901a\u8fc7\u4f7f\u6761\u4ef6\u63d0\u53d6\u66f4\u52a0\u7b80\u6d01\uff0c\u6d88\u9664\u4e86\u8fd9\u79cd\u5197\u4f59\u4ee3\u7801\u3002<\/p>\n<p>\u5728Java 14\u4e4b\u524d:<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>obj <span class=\"token keyword\">instanceof<\/span> <span class=\"token class-name\">Journaldev<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token class-name\">Journaldev<\/span> jd <span class=\"token operator\">=<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Journaldev<\/span><span class=\"token punctuation\">)<\/span> obj<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>jd<span class=\"token punctuation\">.<\/span><span class=\"token function\">getAuthor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4eceJava 14\u5f00\u59cb\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>obj <span class=\"token keyword\">instanceof<\/span> <span class=\"token class-name\">Journaldev<\/span> jd<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token class-name\">System<\/span><span class=\"token punctuation\">.<\/span>out<span class=\"token punctuation\">.<\/span><span class=\"token function\">println<\/span><span class=\"token punctuation\">(<\/span>jd<span class=\"token punctuation\">.<\/span><span class=\"token function\">getAuthor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u53ea\u6709\u5f53obj\u5c5e\u4e8eJournaldev\u7c7b\u578b\u65f6\uff0c\u5b9e\u4f8bjd\u624d\u4f1a\u88ab\u8d4b\u503c\u3002\u53d8\u91cf\u7684\u4f5c\u7528\u8303\u56f4\u4ec5\u9650\u4e8e\u6761\u4ef6\u5757\u5185\u3002<\/p>\n<h2>3. \u6709\u7528\u7684\u7a7a\u6307\u9488\u5f02\u5e38<\/h2>\n<p>\u7a7a\u6307\u9488\u5f02\u5e38\u5bf9\u4e8e\u4efb\u4f55\u5f00\u53d1\u8005\u6765\u8bf4\u90fd\u662f\u4e00\u4e2a\u68d8\u624b\u7684\u95ee\u9898\u3002\u5728Java 13\u4e4b\u524d\uff0c\u8c03\u8bd5\u7a7a\u6307\u9488\u5f02\u5e38\u662f\u4e00\u9879\u68d8\u624b\u7684\u4efb\u52a1\u3002\u5f00\u53d1\u8005\u5fc5\u987b\u4f9d\u8d56\u5176\u4ed6\u8c03\u8bd5\u5de5\u5177\u6216\u624b\u52a8\u627e\u51fa\u53d8\u91cf\/\u65b9\u6cd5\u662f\u5426\u4e3a\u7a7a\uff0c\u56e0\u4e3a\u5806\u6808\u8ddf\u8e2a\u53ea\u4f1a\u663e\u793a\u884c\u53f7\u3002<\/p>\n<p>\u5728Java 14\u4e4b\u524d:<\/p>\n<pre class=\"post-pre\"><code><span class=\"token class-name\">String<\/span> name <span class=\"token operator\">=<\/span> jd<span class=\"token punctuation\">.<\/span><span class=\"token function\">getBlog<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">getAuthor<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>\r\n\r\n<span class=\"token comment\">\/\/\u5806\u6808\u8ddf\u8e2a\u4fe1\u606f<\/span>\r\n<span class=\"token class-name\">Exception<\/span> in thread <span class=\"token string\">\"main\"<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>lang<span class=\"token punctuation\">.<\/span><\/span>NullPointerException<\/span>\r\n    at <span class=\"token class-name\">NullPointerExample<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">NullPointerExample<\/span><span class=\"token punctuation\">.<\/span>java<span class=\"token operator\">:<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>Java 14\u65b0\u5f15\u5165\u4e86\u4e00\u9879JVM\u529f\u80fd\uff0c\u901a\u8fc7\u66f4\u8be6\u7ec6\u7684\u5806\u6808\u5c55\u793a\u63d0\u4f9b\u66f4\u8be6\u7ec6\u7684\u8bca\u65ad\u4fe1\u606f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token class-name\">Exception<\/span> in thread <span class=\"token string\">\"main\"<\/span> <span class=\"token class-name\"><span class=\"token namespace\">java<span class=\"token punctuation\">.<\/span>lang<span class=\"token punctuation\">.<\/span><\/span>NullPointerException<\/span><span class=\"token operator\">:<\/span> <span class=\"token class-name\">Cannot<\/span> invoke <span class=\"token string\">\"Blog.getAuthor()\"<\/span> because the <span class=\"token keyword\">return<\/span> value of <span class=\"token string\">\"Journaldev.getBlog()\"<\/span> is <span class=\"token keyword\">null<\/span>\r\n    at <span class=\"token class-name\">NullPointerExample<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">main<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">NullPointerExample<\/span><span class=\"token punctuation\">.<\/span>java<span class=\"token operator\">:<\/span><span class=\"token number\">4<\/span><span class=\"token punctuation\">)<\/span>\r\n<\/code><\/pre>\n<p>\u6ce8\u610f\uff1a\u4e0a\u8ff0\u529f\u80fd\u5e76\u4e0d\u662f\u8bed\u8a00\u7279\u6027\uff0c\u800c\u662fJVM\u8fd0\u884c\u65f6\u73af\u5883\u7684\u6539\u8fdb\u3002<\/p>\n<h2>4. \u8bb0\u5f55\uff08\u9884\u89c8\uff09<\/h2>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aJava 14 \u7279\u6027\u300b\u7684\u7b2c4\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5185\u5bb9\u7247\u6bb5: \u8bb0\u5f55\uff08Record\uff09\u662f\u4e00\u79cd\u4e13\u95e8\u7528\u4e8e\u5b58\u50a8\u7eaf\u6570\u636e\u7684\u6570\u636e\u7c7b\u3002\u5f15\u5165\u8bb0\u5f55\u7684\u4e3b\u8981\u76ee\u7684\u662f\u4e3a\u4e86\u80fd\u591f\u5feb\u901f\u521b\u5efa\u7b80\u5355\u800c\u7b80\u6d01\u3001\u65e0\u9700\u7f16\u5199\u6837\u677f\u4ee3\u7801\u7684\u7c7b\u3002<\/p>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u5728Java\u4e2d\u521b\u5efa\u4e00\u4e2a\u7c7b\u9700\u8981\u5b9e\u73b0equals()\u3001hashCode()\u65b9\u6cd5\u4ee5\u53cagetter\u548csetter\u65b9\u6cd5\u3002\u867d\u7136\u4e00\u4e9b\u96c6\u6210\u5f00\u53d1\u73af\u5883\uff08IDE\uff09\u652f\u6301\u81ea\u52a8\u751f\u6210\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u4f46\u4ee3\u7801\u4ecd\u7136\u663e\u5f97\u5197\u957f\u3002\u800c\u6709\u4e86\u8bb0\u5f55\uff08Record\uff09\uff0c\u4f60\u53ea\u9700\u8981\u6309\u4ee5\u4e0b\u65b9\u5f0f\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">record<\/span> <span class=\"token class-name\">Author<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span>\r\n<span class=\"token comment\">\/\/\u6216\u8005<\/span>\r\n<span class=\"token keyword\">record<\/span> <span class=\"token class-name\">Author<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> topic<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>Java \u7f16\u8bd1\u5668\u5c06\u81ea\u52a8\u751f\u6210\u6784\u9020\u51fd\u6570\u3001\u79c1\u6709\u7684 final \u5b57\u6bb5\u3001\u8bbf\u95ee\u5668\u65b9\u6cd5\u3001equals\/hashCode \u65b9\u6cd5\u4ee5\u53ca toString \u65b9\u6cd5\u3002\u5bf9\u4e8e\u4e0a\u8ff0\u793a\u4f8b\u7c7b\uff0c\u81ea\u52a8\u751f\u6210\u7684 getter \u65b9\u6cd5\u662f name() \u548c topic()\u3002<\/p>\n<p>\u5728\u4f7f\u7528javac\u5bf9\u7a0b\u5e8f\u8fdb\u884c\u7f16\u8bd1\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528javap Author\u547d\u4ee4\u6765\u67e5\u770b\u751f\u6210\u7684\u4ee3\u7801\u3002\u4e0b\u9762\u7684\u793a\u4f8b\u663e\u793a\u4e86\u4e3a\u8bb0\u5f55 Author(String name, String topic) {} \u751f\u6210\u7684\u7c7b\u7ed3\u6784\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564855ca4b2f92e6c73082a\/42-0.png\" alt=\"Javap Records Java 14\" \/><\/div>\n<p>\u8bb0\u5f55\u7684\u8bed\u4e49\u4e0eKotlin\u4e2d\u7684\u6570\u636e\u7c7b\u76f8\u4f3c\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u6211\u4eec\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u5411\u8bb0\u5f55\u4e2d\u6dfb\u52a0\u989d\u5916\u7684\u5b57\u6bb5\u3001\u65b9\u6cd5\u548c\u6784\u9020\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">record<\/span> <span class=\"token class-name\">Author<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">int<\/span> id<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> topic<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">static<\/span> <span class=\"token keyword\">int<\/span> followers<span class=\"token punctuation\">;<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token keyword\">static<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">followerCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token string\">\"\u7c89\u4e1d\u6570\u91cf\u4e3a: \"<\/span><span class=\"token operator\">+<\/span> followers<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">description<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token string\">\"\u4f5c\u8005 \"<\/span><span class=\"token operator\">+<\/span> name <span class=\"token operator\">+<\/span> <span class=\"token string\">\" \u64c5\u957f\u5199\u4f5c\u7684\u4e3b\u9898\u662f \"<\/span><span class=\"token operator\">+<\/span> topic<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n\r\n    <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Author<\/span><span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">if<\/span> <span class=\"token punctuation\">(<\/span>id <span class=\"token operator\">&lt;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">throw<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">IllegalArgumentException<\/span><span class=\"token punctuation\">(<\/span> <span class=\"token string\">\"id\u5fc5\u987b\u5927\u4e8e0\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n     <span class=\"token punctuation\">}<\/span>\r\n   <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u8bb0\u5f55\u4e2d\u5b9a\u4e49\u7684\u8fd9\u79cd\u9644\u52a0\u6784\u9020\u51fd\u6570\u88ab\u79f0\u4e3a\u7d27\u51d1\u6784\u9020\u51fd\u6570\uff08Compact Constructor\uff09\u3002\u5b83\u4e0d\u5305\u542b\u4efb\u4f55\u53c2\u6570\uff0c\u53ea\u662f\u89c4\u8303\u6784\u9020\u51fd\u6570\u7684\u6269\u5c55\u3002<\/p>\n<p>\u7f16\u8bd1\u5668\u4e0d\u4f1a\u5355\u72ec\u751f\u6210\u7d27\u51d1\u6784\u9020\u51fd\u6570\uff0c\u800c\u662f\u5c06\u5176\u7528\u4e8e\u6570\u636e\u9a8c\u8bc1\uff0c\u5e76\u5728\u4e3b\u6784\u9020\u51fd\u6570\u5f00\u59cb\u65f6\u8c03\u7528\u3002<\/p>\n<p>\u5173\u4e8e\u8bb0\u5f55\uff08Records\uff09\u9700\u8981\u6ce8\u610f\u7684\u51e0\u4e2a\u91cd\u8981\u4e8b\u9879\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u8bb0\u5f55\uff08Record\uff09\u4e0d\u80fd\u7ee7\u627f\u5176\u4ed6\u7c7b\uff0c\u4e5f\u4e0d\u80fd\u88ab\u5176\u4ed6\u7c7b\u7ee7\u627f\u3002\u5b83\u662f\u4e00\u4e2afinal\u7c7b\u3002<\/li>\n<li>\u8bb0\u5f55\u4e0d\u80fd\u662f\u62bd\u8c61\u7684\uff08abstract\uff09<\/li>\n<li>\u8bb0\u5f55\u4e0d\u80fd\u7ee7\u627f\u4efb\u4f55\u5176\u4ed6\u7c7b\uff0c\u5e76\u4e14\u4e0d\u80fd\u5728\u4e3b\u4f53\u5185\u90e8\u5b9a\u4e49\u5b9e\u4f8b\u5b57\u6bb5\u3002\u5b9e\u4f8b\u5b57\u6bb5\u53ea\u80fd\u5728\u72b6\u6001\u63cf\u8ff0\u4e2d\u5b9a\u4e49<\/li>\n<li>\u58f0\u660e\u7684\u5b57\u6bb5\u662f\u79c1\u6709\u7684\uff08private\uff09\u548c\u6700\u7ec8\u7684\uff08final\uff09<\/li>\n<li>\u8bb0\u5f55\u7684\u4e3b\u4f53\u5141\u8bb8\u5b9a\u4e49\u9759\u6001\u5b57\u6bb5\u548c\u65b9\u6cd5<\/li>\n<\/ul>\n<p>\u63a8\u8350\u9605\u8bfb: Java Records<\/p>\n<h3>4.1) \u8bb0\u5f55\u4e2d\u5f15\u7528\u5b57\u6bb5\u7684\u503c\u53ef\u4ee5\u88ab\u6539\u53d8<\/h3>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5bf9\u4e8e\u5b9a\u4e49\u4e3a\u5bf9\u8c61\u7684\u5b57\u6bb5\uff0c\u53ea\u6709\u5f15\u7528\u662f\u4e0d\u53ef\u53d8\u7684\u3002\u5e95\u5c42\u7684\u503c\u4ecd\u7136\u53ef\u4ee5\u88ab\u4fee\u6539\u3002\u4e0b\u9762\u7684\u793a\u4f8b\u5c55\u793a\u4e86\u4e00\u4e2a\u8bb0\u5f55\uff0c\u5176\u4e2dArrayList\u88ab\u4fee\u6539\u7684\u60c5\u51b5\u3002\u6b63\u5982\u4f60\u6240\u770b\u5230\u7684\uff0c\u53ea\u8981ArrayList\u7684\u5185\u5bb9\u88ab\u6539\u53d8\uff0c\u5176\u503c\u5c31\u4f1a\u88ab\u4fee\u6539\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564855ca4b2f92e6c73082a\/53-0.png\" alt=\"Java 14 Records Mutable Values For References\" \/><\/div>\n<h3>4.2\uff09\u8bb0\u5f55\u53ef\u4ee5\u5b9e\u73b0\u63a5\u53e3<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aJava 14 \u7279\u6027\u300b\u7684\u7b2c5\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n<p>\u4ee5\u4e0b\u4ee3\u7801\u5c55\u793a\u4e86\u4f7f\u7528\u8bb0\u5f55\u5b9e\u73b0\u63a5\u53e3\u7684\u793a\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">record<\/span> <span class=\"token class-name\">Author<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> topic<span class=\"token punctuation\">)<\/span> <span class=\"token keyword\">implements<\/span> <span class=\"token class-name\">Information<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">getFullName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n    <span class=\"token keyword\">return<\/span> <span class=\"token string\">\"Author \"<\/span><span class=\"token operator\">+<\/span> name <span class=\"token operator\">+<\/span> <span class=\"token string\">\" writes on \"<\/span> <span class=\"token operator\">+<\/span> topic<span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n\r\n<span class=\"token keyword\">interface<\/span> <span class=\"token class-name\">Information<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token class-name\">String<\/span> <span class=\"token function\">getFullName<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u5728JShell\u4e2d\u6267\u884c\u4e0a\u8ff0\u4ee3\u7801\u7684\u8f93\u51fa\u7ed3\u679c:<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564855ca4b2f92e6c73082a\/58-0.png\" alt=\"Java 14 \u8bb0\u5f55\u4e0e\u63a5\u53e3\" \/><\/div>\n<h3>4.3) \u8bb0\u5f55\u652f\u6301\u591a\u4e2a\u6784\u9020\u51fd\u6570<\/h3>\n<p>\u5982\u4e0b\u6240\u793a\uff0c\u8bb0\u5f55\u5141\u8bb8\u58f0\u660e\u5e26\u53c2\u6570\u6216\u4e0d\u5e26\u53c2\u6570\u7684\u591a\u4e2a\u6784\u9020\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">record<\/span> <span class=\"token class-name\">Author<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> topic<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Author<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n\r\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">\"NA\"<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"NA\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token punctuation\">}<\/span>\r\n\r\n  <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">Author<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n\r\n    <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> <span class=\"token string\">\"NA\"<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span>\r\n  <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<h3>4.4) \u8bb0\u5f55\u5141\u8bb8\u4fee\u6539\u8bbf\u95ee\u8005\u65b9\u6cd5<\/h3>\n<p>\u867d\u7136\u8bb0\u5f55\u4f1a\u4e3a\u72b6\u6001\u63cf\u8ff0\u4e2d\u5b9a\u4e49\u7684\u5b57\u6bb5\u751f\u6210\u516c\u5171\u8bbf\u95ee\u5668\u65b9\u6cd5\uff0c\u4f46\u5b83\u4eec\u4e5f\u5141\u8bb8\u60a8\u5728\u6b63\u6587\u4e2d\u91cd\u65b0\u5b9a\u4e49\u8bbf\u95ee\u5668\u65b9\u6cd5\uff0c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"token keyword\">record<\/span> <span class=\"token class-name\">Author<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">String<\/span> name<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">String<\/span> topic<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n  <span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">name<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span>\r\n        <span class=\"token keyword\">return<\/span> <span class=\"token string\">\"This article was written by \"<\/span> <span class=\"token operator\">+<\/span> <span class=\"token keyword\">this<\/span><span class=\"token punctuation\">.<\/span>name<span class=\"token punctuation\">;<\/span>\r\n    <span class=\"token punctuation\">}<\/span>\r\n<span class=\"token punctuation\">}<\/span>\r\n<\/code><\/pre>\n<h3>4.5\uff09\u8fd0\u884c\u65f6\u68c0\u67e5\u8bb0\u5f55\u53ca\u5176\u7ec4\u4ef6<\/h3>\n<p>\u8bb0\u5f55\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86isRecord()\u548cgetRecordComponents()\u6765\u68c0\u67e5\u7c7b\u662f\u5426\u662f\u4e00\u4e2a\u8bb0\u5f55\uff0c\u4ee5\u53ca\u67e5\u770b\u5b83\u7684\u5b57\u6bb5\u548c\u7c7b\u578b\u3002\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u8fdb\u884c\u64cd\u4f5c\u3002<\/p>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564855ca4b2f92e6c73082a\/67-0.png\" alt=\"Java 14 \u8bb0\u5f55\u8fd0\u884c\u65f6\u68c0\u67e5\" \/><\/div>\n<p>\u5c3d\u7ba1\u5728\u4e0a\u8ff0\u4ee3\u7801\u793a\u4f8b\u4e2d\u6211\u4eec\u786e\u5b9e\u6dfb\u52a0\u4e86\u989d\u5916\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\u5230\u8bb0\u5f55\u4e2d\uff0c\u4f46\u8bf7\u786e\u4fdd\u4e0d\u8981\u8fc7\u5ea6\u4f7f\u7528\u3002\u8bb0\u5f55\u8bbe\u8ba1\u4e3a\u7eaf\u6570\u636e\u8f7d\u4f53\uff0c\u5982\u679c\u60a8\u5e0c\u671b\u5b9e\u73b0\u5927\u91cf\u989d\u5916\u7684\u65b9\u6cd5\uff0c\u6700\u597d\u8fd8\u662f\u4f7f\u7528\u666e\u901a\u7c7b\u3002<\/p>\n<h2>5. \u6587\u672c\u5757\uff08\u9884\u89c8\u7248\uff09<\/h2>\n<p>Java 13\u5f15\u5165\u4e86\u6587\u672c\u5757\u4f5c\u4e3a\u9884\u89c8\u529f\u80fd\uff0c\u65e8\u5728\u7b80\u5316\u591a\u884c\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\u7684\u521b\u5efa\u3002\u5b83\u5728\u5904\u7406HTML\u3001JSON\u6216SQL\u67e5\u8be2\u5b57\u7b26\u4e32\u7b49\u573a\u666f\u4e2d\u7279\u522b\u6709\u7528\u3002<\/p>\n<p>\u5728Java 14\u4e2d\uff0c\u6587\u672c\u5757\u4ecd\u5904\u4e8e\u9884\u89c8\u72b6\u6001\uff0c\u5e76\u5f15\u5165\u4e86\u4e00\u4e9b\u65b0\u529f\u80fd\u3002\u73b0\u5728\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7279\u6027\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u53cd\u659c\u6760\u7528\u4e8e\u663e\u793a\u7f8e\u89c2\u7684\u591a\u884c\u5b57\u7b26\u4e32\u5757\u3002<\/li>\n<li>\\s\u7528\u4e8e\u4fdd\u7559\u5c3e\u968f\u7a7a\u683c\uff0c\u8fd9\u4e9b\u7a7a\u683c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4f1a\u88ab\u7f16\u8bd1\u5668\u5ffd\u7565\u3002\u5b83\u4f1a\u4fdd\u7559\u5176\u524d\u9762\u7684\u6240\u6709\u7a7a\u683c\u3002<\/li>\n<\/ul>\n<pre class=\"post-pre\"><code><span class=\"token class-name\">String<\/span> text <span class=\"token operator\">=<\/span> <span class=\"token string\">\"\"<\/span>\"\"\r\n                <span class=\"token class-name\">Did<\/span> you know \\\\\r\n                <span class=\"token class-name\">Java<\/span> <span class=\"token number\">14<\/span> \\\\\r\n                has the most features among\\\\\r\n                all non<span class=\"token operator\">-<\/span><span class=\"token constant\">LTS<\/span> versions so far\\\\\r\n                <span class=\"token string\">\"\"<\/span>\"\"\"<span class=\"token punctuation\">;<\/span>\r\n\r\n<span class=\"token class-name\">String<\/span> text2 <span class=\"token operator\">=<\/span> <span class=\"token triple-quoted-string string\">\"\"\"\r\n                line1\r\n                line2 \\\\s\r\n                line3\r\n                \"\"\"<\/span><span class=\"token punctuation\">;<\/span>\r\n\r\n\r\n<span class=\"token class-name\">String<\/span> text3 <span class=\"token operator\">=<\/span> <span class=\"token string\">\"line1\\nline2 \\nline3\\n\"<\/span>\r\n\r\n<span class=\"token comment\">\/\/text2\u548ctext3\u662f\u76f8\u7b49\u7684\u3002<\/span>\r\n<\/code><\/pre>\n<p>\u53c2\u8003\u8d44\u6599\uff1aOpenJDK 14<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6309\u7167\u516d\u4e2a\u6708\u7684\u53d1\u5e03\u5468\u671f\u4f20\u7edf\uff0c\u7ee72019\u5e749\u670817\u65e5\u53d1\u5e03Java 13\u4e4b\u540e\uff0cJava 14\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u975eLTS\uff08\u957f\u671f [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1243,761,1244],"class_list":["post-380","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-java-14","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5168\u9762\u89e3\u6790Java 14\u65b0\u7279\u6027\uff1a\u5f00\u53d1\u8005\u5fc5\u77e5\u7684\u8bed\u8a00\u6539\u8fdb - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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