{"id":203089,"date":"2025-05-22T10:27:05","date_gmt":"2025-05-22T02:27:05","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203089\/"},"modified":"2025-05-22T10:27:05","modified_gmt":"2025-05-22T02:27:05","slug":"java%e4%bb%a3%e7%a0%81%e7%ae%80%e6%b4%81%e5%8c%96%e7%9a%84%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e6%80%9d%e6%83%b3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203089\/","title":{"rendered":"Java\u4ee3\u7801\u7b80\u6d01\u5316\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u601d\u60f3"},"content":{"rendered":"

<\/b> <\/p>\n

Java\u4ee3\u7801\u7b80\u6d01\u5316\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u601d\u60f3<\/h1>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u52aa\u529b\u5b66\u4e60\u5427\uff01\u672c\u6587\u300aJava\u4ee3\u7801\u7b80\u6d01\u5316\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u601d\u60f3\u300b<\/span>\u4e3b\u8981\u8bb2\u89e3\u4e86<\/span>\u7b49\u7b49\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6211\u4f1a\u5728\u4e2d\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u7684\u7cfb\u5217\u6587\u7ae0\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u5e76\u79ef\u6781\u7559\u8a00\u5efa\u8bae\u3002\u4e0b\u9762\u5c31\u5148\u4e00\u8d77\u6765\u770b\u4e00\u4e0b\u672c\u7bc7\u6b63\u6587\u5185\u5bb9\u5427\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01<\/p>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\u601d\u60f3\u901a\u8fc7\u4e0d\u53ef\u53d8\u72b6\u6001\u548c\u7eaf\u51fd\u6570\u7b80\u5316 Java \u4ee3\u7801\uff0c\u5e76\u901a\u8fc7 Lambda \u8868\u8fbe\u5f0f\u548c\u65b9\u6cd5\u5f15\u7528\u8fdb\u4e00\u6b65\u63d0\u5347\u7b80\u6d01\u6027\u3002\u8fd9\u4e9b\u6280\u672f\u975e\u5e38\u9002\u5408\u6570\u636e\u6d41\u5206\u6790\u7b49\u529f\u80fd\u6027\u4efb\u52a1\uff0c\u4ece\u800c\u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027\u3001\u53ef\u9884\u6d4b\u6027\uff0c\u5e76\u7b80\u5316\u63a8\u7406\u548c\u7ef4\u62a4\u3002<\/p>\n

<\/p>\n

Java \u4ee3\u7801\u7b80\u6d01\u5316\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u601d\u60f3<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u5f3a\u8c03\u4e0d\u53ef\u53d8\u72b6\u6001\u548c\u7eaf\u51fd\u6570\u7684\u7f16\u7a0b\u8303\u5f0f\u3002\u901a\u8fc7\u5e94\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u601d\u60f3\uff0cJava \u7a0b\u5e8f\u5458\u53ef\u4ee5\u7f16\u5199\u66f4\u7b80\u6d01\u3001\u66f4\u53ef\u9884\u6d4b\u7684\u4ee3\u7801\u3002<\/p>\n

\u4e0d\u53ef\u53d8\u72b6\u6001<\/strong><\/p>\n

\u4e0d\u53ef\u53d8\u610f\u5473\u7740\u5bf9\u8c61\u5728\u521b\u5efa\u540e\u4e0d\u80fd\u88ab\u4fee\u6539\u3002\u8fd9\u6709\u52a9\u4e8e\u907f\u514d\u610f\u5916\u7684\u72b6\u6001\u4fee\u6539\uff0c\u5e76\u4f7f\u5f97\u7a0b\u5e8f\u66f4\u6613\u4e8e\u63a8\u7406\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4ee5\u4e0b\u53ef\u53d8\u5217\u8868\uff1a<\/p>\n

List<String> names = new ArrayList<>();\nnames.add(\"Alice\");\nnames.add(\"Bob\");<\/pre>\n
\u8f6c\u6362\u4e3a\u4e0d\u53ef\u53d8\u5217\u8868\uff1a<\/p>\n
List<String> names = List.of(\"Alice\", \"Bob\");<\/pre>\n
\u7eaf\u51fd\u6570<\/strong><\/p>\n
\u7eaf\u51fd\u6570\u4e0d\u6539\u53d8\u4efb\u4f55\u5916\u90e8\u72b6\u6001\uff0c\u5e76\u4e14\u603b\u662f\u8fd4\u56de\u76f8\u540c\u7684\u7ed3\u679c\u3002\u8fd9\u4f7f\u5f97\u7a0b\u5e8f\u66f4\u5bb9\u6613\u6d4b\u8bd5\u548c\u8c03\u8bd5\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4ee5\u4e0b\u4e0d\u7eaf\u51fd\u6570\uff1a<\/p>\n
StringBuilder greeting = new StringBuilder();\npublic void greet(String name) {\n  greeting.append(\"Hello, \").append(name);\n}<\/pre>\n
\u8f6c\u6362\u4e3a\u7eaf\u51fd\u6570\uff1a<\/p>\n
public String greet(String name) {\n  return \"Hello, \" + name;\n}<\/pre>\n
Lambda \u8868\u8fbe\u5f0f<\/strong><\/p>\n
Lambda \u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u7b80\u6d01\u5730\u8868\u793a\u533f\u540d\u51fd\u6570\u7684\u65b9\u6cd5\u3002\u5b83\u4eec\u53ef\u4ee5\u7528\u4e8e\u66ff\u6362 Java \u4e2d\u7b28\u91cd\u7684\u533f\u540d\u5185\u90e8\u7c7b\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4ee5\u4e0b\u533f\u540d\u5185\u90e8\u7c7b\uff1a<\/p>\n
new Comparator<String>() {\n  @Override\n  public int compare(String o1, String o2) {\n    return o1.compareTo(o2);\n  }\n};<\/pre>\n
\u8f6c\u6362\u4e3a Lambda \u8868\u8fbe\u5f0f\uff1a<\/p>\n
(o1, o2) -> o1.compareTo(o2);<\/pre>\n
\u65b9\u6cd5\u5f15\u7528<\/strong><\/p>\n
\u65b9\u6cd5\u5f15\u7528\u662f Lambda \u8868\u8fbe\u5f0f\u7684\u4e00\u79cd\u7279\u6b8a\u5f62\u5f0f\uff0c\u5b83\u5f15\u7528\u73b0\u6709\u65b9\u6cd5\u3002\u8fd9\u53ef\u4ee5\u8fdb\u4e00\u6b65\u7b80\u5316\u4ee3\u7801\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4ee5\u4e0b Lambda \u8868\u8fbe\u5f0f\uff1a<\/p>\n
(String s) -> s.toUpperCase();<\/pre>\n
\u8f6c\u6362\u4e3a\u65b9\u6cd5\u5f15\u7528\uff1a<\/p>\n
String::toUpperCase<\/pre>\n
\u5b9e\u6218\u6848\u4f8b\uff1a\u6570\u636e\u6d41\u5206\u6790<\/strong><\/p>\n
\u51fd\u6570\u5f0f\u7f16\u7a0b\u975e\u5e38\u9002\u5408\u4e8e\u6570\u636e\u6d41\u5206\u6790\u7b49\u529f\u80fd\u6027\u4efb\u52a1\u3002\u8ba9\u6211\u4eec\u8003\u8651\u4e00\u4e2a\u8bfb\u53d6\u6570\u5b57\u6d41\u5e76\u8ba1\u7b97\u5176\u548c\u7684\u793a\u4f8b\uff1a<\/p>\n
List<Integer> numbers = List.of(1, 2, 3, 4, 5);\n\n\/\/ \u53ef\u53d8\u89e3\u51b3\u65b9\u6848\nint sum = 0;\nfor (int number : numbers) {\n  sum += number;\n}\n\n\/\/ \u51fd\u6570\u5f0f\u89e3\u51b3\u65b9\u6848\nint sum = numbers.stream()\n    .reduce(0, Integer::sum);<\/pre>\n
\u51fd\u6570\u5f0f\u89e3\u51b3\u65b9\u6848\u4f7f\u7528\u4e86 Java 8 \u6d41 API\uff0c\u63d0\u4f9b\u4e86\u7b80\u6d01\u548c\u53ef\u8bfb\u6027\u3002reduce<\/code> \u65b9\u6cd5\u4f7f\u7528\u4e86\u4e8c\u5143\u64cd\u4f5c\uff08Integer::sum<\/code>\uff09\uff0c\u5c06\u6d41\u4e2d\u7684\u503c\u7d2f\u79ef\u5230\u4e00\u4e2a\u805a\u5408\u503c\uff080<\/code>\uff09\u3002<\/p>\n
\u7ed3\u8bba<\/strong><\/p>\n
\u51fd\u6570\u5f0f\u7f16\u7a0b\u601d\u60f3\u548c\u6280\u672f\u53ef\u4ee5\u6781\u5927\u5730\u7b80\u5316 Java \u4ee3\u7801\uff0c\u4f7f\u5176\u66f4\u7b80\u6d01\u3001\u66f4\u53ef\u8bfb\uff0c\u5e76\u4e14\u66f4\u6613\u4e8e\u63a8\u7406\u7ef4\u62a4\u3002\u901a\u8fc7\u5e94\u7528\u8fd9\u4e9b\u6982\u5ff5\uff0c\u7a0b\u5e8f\u5458\u53ef\u4ee5\u7f16\u5199\u66f4\u6709\u6548\u7387\u3001\u66f4\u53ef\u9760\u7684\u4ee3\u7801\u3002<\/p>\n
\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJava\u4ee3\u7801\u7b80\u6d01\u5316\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u601d\u60f3\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
Java\u4ee3\u7801\u7b80\u6d01\u5316\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u601d...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203089","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203089","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203089"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203089\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203089"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203089"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203089"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}