{"id":74568,"date":"2026-02-10T05:09:14","date_gmt":"2026-02-09T21:09:14","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/74568.html"},"modified":"2026-02-10T05:09:14","modified_gmt":"2026-02-09T21:09:14","slug":"java%e8%bf%9b%e5%8c%96%e5%8f%b2%ef%bc%9a%e4%bb%8ejdk8%e5%88%b025%e7%9a%84%e6%83%8a%e8%89%b3%e8%9c%95%e5%8f%98","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/74568.html","title":{"rendered":"Java\u8fdb\u5316\u53f2\uff1a\u4eceJDK8\u523025\u7684\u60ca\u8273\u8715\u53d8"},"content":{"rendered":"<p>\u4ee5\u4e0b\u662f\u5bf9 JDK 8 \u81f3 JDK 25 \u4e3b\u8981\u7279\u6027\u7684\u6df1\u5ea6\u89e3\u6790&#xff0c;\u6309\u7248\u672c\u8fed\u4ee3\u987a\u5e8f\u7ec4\u7ec7&#xff1a;<\/p>\n<hr \/>\n<h4>JDK 8 (2014)<\/h4>\n<p>\u6838\u5fc3\u7279\u6027<\/p>\n<li>Lambda \u8868\u8fbe\u5f0f\n<ul>\n<li>\u7b80\u5316\u533f\u540d\u5185\u90e8\u7c7b&#xff0c;\u652f\u6301\u51fd\u6570\u5f0f\u7f16\u7a0b&#xff0c;\u4f8b\u5982&#xff1a;\n<p>(x, y) -&gt; x &#043; y<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>Stream API\n<ul>\n<li>\u96c6\u5408\u64cd\u4f5c\u6d41\u6c34\u7ebf\u5904\u7406&#xff1a;\n<p>list.stream().filter(x -&gt; x &gt; 0).mapToInt(x -&gt; x * 2).sum();<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u9ed8\u8ba4\u65b9\u6cd5\n<ul>\n<li>\u63a5\u53e3\u652f\u6301 default \u65b9\u6cd5\u5b9e\u73b0&#xff1a;\n<p>interface A { default void log() { System.out.println(&#034;A&#034;); } }<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u65b0\u7684\u65e5\u671f\u65f6\u95f4 API\n<ul>\n<li>java.time \u5305\u66ff\u4ee3 java.util.Date&#xff1a;\n<p>LocalDateTime now &#061; LocalDateTime.now();<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<hr \/>\n<h4>JDK 9 (2017)<\/h4>\n<p>\u6a21\u5757\u7cfb\u7edf (Jigsaw)<\/p>\n<ul>\n<li>\u5f15\u5165\u6a21\u5757\u5316&#xff08;module-info.java&#xff09;\u89e3\u51b3\u4f9d\u8d56\u95ee\u9898&#xff1a;\n<p>module com.example { requires java.base; }<\/p>\n<\/li>\n<\/ul>\n<p>\u96c6\u5408\u5de5\u5382\u65b9\u6cd5<\/p>\n<ul>\n<li>\u5feb\u901f\u521b\u5efa\u4e0d\u53ef\u53d8\u96c6\u5408&#xff1a;\n<p>List&lt;String&gt; list &#061; List.of(&#034;A&#034;, &#034;B&#034;);<\/p>\n<\/li>\n<\/ul>\n<p>\u63a5\u53e3\u79c1\u6709\u65b9\u6cd5<\/p>\n<ul>\n<li>\u63a5\u53e3\u652f\u6301 private \u65b9\u6cd5&#xff1a;\n<p>interface B { private void log() { System.out.println(&#034;B&#034;); } }<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>JDK 10 (2018)<\/h4>\n<p>\u5c40\u90e8\u53d8\u91cf\u7c7b\u578b\u63a8\u65ad<\/p>\n<ul>\n<li>var \u5173\u952e\u5b57\u7b80\u5316\u7c7b\u578b\u58f0\u660e&#xff1a;\n<p>var list &#061; new ArrayList&lt;String&gt;();<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>JDK 11 (LTS, 2018)<\/h4>\n<p>HTTP Client API<\/p>\n<ul>\n<li>\u652f\u6301\u5f02\u6b65 HTTP \u8bf7\u6c42&#xff1a;\n<p>HttpClient.newHttpClient().sendAsync(request, BodyHandlers.ofString());<\/p>\n<\/li>\n<\/ul>\n<p>\u5355\u6587\u4ef6\u6e90\u4ee3\u7801\u6267\u884c<\/p>\n<ul>\n<li>\u76f4\u63a5\u8fd0\u884c .java \u6587\u4ef6&#xff1a;\n<p>java Hello.java<\/p>\n<\/li>\n<\/ul>\n<hr \/>\n<h4>JDK 12-15 (\u975eLTS)<\/h4>\n<li>Switch \u8868\u8fbe\u5f0f (JDK 12 \u9884\u89c8)\n<p>int day &#061; switch (value) { case 1 -&gt; 1; default -&gt; 0; };<\/p>\n<\/li>\n<li>\u6587\u672c\u5757 (JDK 13 \u9884\u89c8)\n<p>String json &#061; &#034;&#034;&#034; { &#034;name&#034;: &#034;Java&#034; } &#034;&#034;&#034;;<\/p>\n<\/li>\n<li>Record \u7c7b (JDK 14 \u9884\u89c8)\n<ul>\n<li>\u7b80\u5316\u4e0d\u53ef\u53d8\u6570\u636e\u7c7b&#xff1a;\n<p>record Point(int x, int y) {}<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\u5bc6\u5c01\u7c7b (JDK 15 \u9884\u89c8)\n<ul>\n<li>\u9650\u5236\u7c7b\u7ee7\u627f&#xff1a;\n<p>sealed class Shape permits Circle, Rectangle {}<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<hr \/>\n<h4>JDK 16 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