{"id":980,"date":"2025-12-27T11:15:23","date_gmt":"2025-12-27T03:15:23","guid":{"rendered":"https:\/\/www.52runoob.com\/?p=980"},"modified":"2025-12-27T11:15:23","modified_gmt":"2025-12-27T03:15:23","slug":"java11","status":"publish","type":"post","link":"https:\/\/www.52runoob.com\/index.php\/2025\/12\/27\/java11\/","title":{"rendered":"java11"},"content":{"rendered":"\n<p>\u4f60\u63d0\u5230 <strong>Java 11<\/strong>\uff0c\u6211\u53ef\u4ee5\u5e2e\u4f60\u6574\u7406\u4e00\u4e2a <strong>Java 11 \u7684\u5168\u9762\u6982\u89c8<\/strong>\uff0c\u6db5\u76d6\u65b0\u7279\u6027\u3001\u5b89\u88c5\u3001\u5f00\u53d1\u6ce8\u610f\u70b9\u548c\u4f7f\u7528\u573a\u666f\u3002\u4e0b\u9762\u662f\u8be6\u7ec6\u5185\u5bb9\uff1a<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001Java 11 \u7b80\u4ecb<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u53d1\u5e03\u65f6\u95f4<\/strong>\uff1a2018 \u5e74 9 \u6708<\/li>\n\n\n\n<li><strong>\u7c7b\u578b<\/strong>\uff1a\u957f\u671f\u652f\u6301\u7248\u672c\uff08LTS\uff0cLong-Term Support\uff09<\/li>\n\n\n\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u79fb\u9664\u4e86\u4e00\u4e9b\u65e7 API\uff08\u5982 <code>Java EE<\/code> \u548c <code>CORBA<\/code> \u6a21\u5757\uff09<\/li>\n\n\n\n<li>\u5f15\u5165\u65b0\u7684\u6807\u51c6 API \u548c\u5de5\u5177<\/li>\n\n\n\n<li>\u66f4\u6ce8\u91cd <strong>\u6027\u80fd\u3001\u5b89\u5168\u548c\u73b0\u4ee3\u5316\u5f00\u53d1\u4f53\u9a8c<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001Java 11 \u65b0\u7279\u6027\uff08\u91cd\u70b9\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>\u5b57\u7b26\u4e32\u589e\u5f3a<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>String<\/code> \u65b0\u65b9\u6cd5\uff1a\n<ul class=\"wp-block-list\">\n<li><code>isBlank()<\/code> \u2192 \u5224\u65ad\u662f\u5426\u4e3a\u7a7a\u767d<\/li>\n\n\n\n<li><code>lines()<\/code> \u2192 \u6309\u884c\u5206\u5272\u5b57\u7b26\u4e32\u4e3a Stream<\/li>\n\n\n\n<li><code>strip() \/ stripLeading() \/ stripTrailing()<\/code> \u2192 \u53bb\u9664\u7a7a\u767d\uff08\u6bd4 trim \u66f4\u667a\u80fd\uff09<\/li>\n\n\n\n<li><code>repeat(int)<\/code> \u2192 \u91cd\u590d\u5b57\u7b26\u4e32<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>\u793a\u4f8b\uff1a<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nString text = &quot;  Hello\\nWorld  &quot;;\ntext.lines().forEach(System.out::println);\nSystem.out.println(&quot; &quot;.isBlank()); \/\/ true\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>\u96c6\u5408\u589e\u5f3a<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>List.of() \/ Set.of() \/ Map.of()<\/code> \u2192 \u8f7b\u677e\u521b\u5efa\u4e0d\u53ef\u53d8\u96c6\u5408<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nList&amp;lt;String&gt; list = List.of(&quot;A&quot;, &quot;B&quot;, &quot;C&quot;);\nMap&amp;lt;String, Integer&gt; map = Map.of(&quot;x&quot;, 1, &quot;y&quot;, 2);\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>Lambda \u4e0e Optional \u6539\u8fdb<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>Optional.isEmpty()<\/code> \u2192 \u68c0\u67e5\u662f\u5426\u4e3a\u7a7a<\/li>\n\n\n\n<li>\u652f\u6301\u66f4\u7075\u6d3b\u7684\u6d41\u5f0f\u64cd\u4f5c<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>\u65b0 HTTP \u5ba2\u6237\u7aef API<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b8c\u5168\u66ff\u4ee3 <code>HttpURLConnection<\/code><\/li>\n\n\n\n<li>\u652f\u6301\u5f02\u6b65\u8bf7\u6c42\u548c HTTP\/2<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nHttpClient client = HttpClient.newHttpClient();\nHttpRequest request = HttpRequest.newBuilder()\n        .uri(URI.create(&quot;https:\/\/example.com&quot;))\n        .build();\nHttpResponse&amp;lt;String&gt; response = client.send(request, HttpResponse.BodyHandlers.ofString());\nSystem.out.println(response.body());\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">5. <strong>\u5c40\u90e8\u53d8\u91cf\u7c7b\u578b\u63a8\u65ad\uff08var\uff09\u6539\u8fdb<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Java 10 \u5f15\u5165\u7684 <code>var<\/code> \u5728 Java 11 \u4e2d\u53ef\u7528\u4e8e lambda \u53c2\u6570\uff08\u90e8\u5206\u573a\u666f\uff09<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nvar list = List.of(1, 2, 3);\nlist.forEach((var item) -&gt; System.out.println(item));\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">6. <strong>JEP 321\uff1aHTTP Client \u6807\u51c6\u5316<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u652f\u6301\u540c\u6b65\u548c\u5f02\u6b65\u8bf7\u6c42<\/li>\n\n\n\n<li>\u652f\u6301 WebSocket<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">7. <strong>\u8fd0\u884c\u65f6\u52a8\u6001\u7c7b\u6587\u4ef6\u6253\u5305<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ef\u4ee5\u76f4\u63a5\u7528 <code>java<\/code> \u547d\u4ee4\u8fd0\u884c\u5355\u4e2a <code>.java<\/code> \u6587\u4ef6<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\njava HelloWorld.java\n\n<\/pre><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e0\u9700\u5148\u7f16\u8bd1\u6210 <code>.class<\/code><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001Java 11 \u79fb\u9664\u6216\u5f03\u7528\u7684\u7279\u6027<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>Java EE<\/code> \u6a21\u5757\uff08<code>java.xml.bind<\/code>, <code>java.activation<\/code> \u7b49\uff09<\/li>\n\n\n\n<li><code>CORBA<\/code> \u6a21\u5757<\/li>\n\n\n\n<li><code>Pack200<\/code> \u5de5\u5177<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u5f00\u53d1\u4e2d\u5982\u679c\u7528\u5230\u8fd9\u4e9b\uff0c\u9700\u8981\u5355\u72ec\u5f15\u5165\u4f9d\u8d56\uff08Maven \u6216 Gradle\uff09\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u5b89\u88c5\u4e0e\u4f7f\u7528<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e0b\u8f7d JDK 11\uff08\u63a8\u8350 OpenJDK \u6216 Oracle JDK\uff09<\/li>\n\n\n\n<li>\u914d\u7f6e\u73af\u5883\u53d8\u91cf <code>JAVA_HOME<\/code><\/li>\n\n\n\n<li>\u9a8c\u8bc1\uff1a<\/li>\n<\/ol>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\njava -version\n# java version &quot;11.0.x&quot;\n\n<\/pre><\/div>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u9002\u5408\u4f7f\u7528\u573a\u666f<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f01\u4e1a\u7ea7\u5e94\u7528\uff08LTS \u652f\u6301\uff09<\/li>\n\n\n\n<li>Web \u670d\u52a1\u3001\u5fae\u670d\u52a1\u5f00\u53d1<\/li>\n\n\n\n<li>\u65b0\u9879\u76ee\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u65b0 API\uff0c\u63d0\u9ad8\u5f00\u53d1\u6548\u7387<\/li>\n\n\n\n<li>\u5f03\u7528\u8001\u65e7\u6a21\u5757\uff0c\u51cf\u5c11\u7ef4\u62a4\u8d1f\u62c5<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4f60\u63d0\u5230 Java 11\uff0c\u6211\u53ef\u4ee5\u5e2e\u4f60\u6574\u7406\u4e00\u4e2a Java 11 \u7684\u5168\u9762\u6982\u89c8\uff0c\u6db5\u76d6\u65b0\u7279&#8230; <a class=\"more-link\" href=\"https:\/\/www.52runoob.com\/index.php\/2025\/12\/27\/java11\/\">Continue Reading &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-980","post","type-post","status-publish","format-standard","hentry","category-java"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/980","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/comments?post=980"}],"version-history":[{"count":1,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/980\/revisions"}],"predecessor-version":[{"id":981,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/posts\/980\/revisions\/981"}],"wp:attachment":[{"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/media?parent=980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/categories?post=980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52runoob.com\/index.php\/wp-json\/wp\/v2\/tags?post=980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}