{"id":202968,"date":"2025-05-22T12:19:28","date_gmt":"2025-05-22T04:19:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202968\/"},"modified":"2025-05-22T12:19:28","modified_gmt":"2025-05-22T04:19:28","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%9e%84%e9%80%a0%e5%87%bd%e6%95%b0%e5%bc%95%e7%94%a8%e5%ae%9a%e4%b9%89-java-%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202968\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u6784\u9020\u51fd\u6570\u5f15\u7528\u5b9a\u4e49 Java \u51fd\u6570\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u4f7f\u7528\u6784\u9020\u51fd\u6570\u5f15\u7528\u5b9a\u4e49 Java \u51fd\u6570\uff1f<\/h1>\n

\u6587\u7ae0<\/span>\u4e0d\u77e5\u9053\u5927\u5bb6\u662f\u5426\u719f\u6089\uff1f\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u4f7f\u7528\u6784\u9020\u51fd\u6570\u5f15\u7528\u5b9a\u4e49 Java \u51fd\u6570\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u5728\u770b\u5b8c\u672c\u7bc7\u6587\u7ae0\u540e\uff0c\u6709\u66f4\u597d\u7684\u5efa\u8bae\u6216\u8005\u53d1\u73b0\u54ea\u91cc\u6709\u95ee\u9898\uff0c\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u79ef\u6781\u8bc4\u8bba\u6307\u51fa\uff0c\u8c22\u8c22\uff01\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u52a0\u6cb9\u8fdb\u6b65\uff01<\/p>\n

\u6784\u9020\u51fd\u6570\u5f15\u7528\u5141\u8bb8\u6211\u4eec\u4f7f\u7528\u6784\u9020\u51fd\u6570\u6765\u521b\u5efa\u51fd\u6570\u3002\u8bed\u6cd5\uff1aClassName::new\u3002\u5b83\u901a\u8fc7\u7b80\u5316\u5bf9\u8c61\u521b\u5efa\u7684\u8fc7\u7a0b\u6765\u589e\u5f3a\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u4f7f\u7528\u6784\u9020\u51fd\u6570\u5f15\u7528\u5b9a\u4e49 Java \u51fd\u6570\uff1f<\/h2>\n

\u6784\u9020\u51fd\u6570\u5f15\u7528\u662f\u4e00\u79cd\u7279\u6b8a\u7684 lambda \u8868\u8fbe\u5f0f\uff0c\u5b83\u901a\u8fc7\u5f15\u7528\u6784\u9020\u51fd\u6570\u6765\u521b\u5efa\u51fd\u6570\u3002\u5b83\u5141\u8bb8\u6211\u4eec\u7b80\u5316\u9700\u8981\u4f7f\u7528\u6784\u9020\u51fd\u6570\u6765\u521b\u5efa\u5bf9\u8c61\u7684\u60c5\u51b5\u4e0b\u7684\u4ee3\u7801\u3002<\/p>\n

\u8bed\u6cd5\uff1a<\/strong><\/p>\n

ClassName::new<\/pre>\n
\u5176\u4e2d ClassName<\/code> \u662f\u8981\u4ece\u4e2d\u521b\u5efa\u5bf9\u8c61\u7684\u7c7b\u7684\u540d\u79f0\u3002<\/p>\n
\u7528\u6cd5\uff1a<\/strong><\/p>\n
\u53ef\u4ee5\u4f7f\u7528\u6784\u9020\u51fd\u6570\u5f15\u7528\u6765\u5b9a\u4e49\u51fd\u6570\uff0c\u8be5\u51fd\u6570\u5c06\u521b\u5efa\u6307\u5b9a\u7c7b\u7684\u5bf9\u8c61\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u521b\u5efa\u4e00\u4e2a\u83b7\u53d6 String<\/code> \u5bf9\u8c61\u7684\u51fd\u6570\uff1a<\/p>\n
Function<String, String> stringCreator = String::new;<\/pre>\n
\u73b0\u5728\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8be5\u51fd\u6570\u6765\u521b\u5efa String<\/code> \u5bf9\u8c61\uff1a<\/p>\n
String result = stringCreator.apply(\"foo\"); \/\/ result \u4e3a \"foo\"<\/pre>\n
\u5b9e\u6218\u6848\u4f8b\uff1a<\/strong><\/p>\n
\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a Person<\/code> \u7c7b\uff0c\u5b83\u5177\u6709\u4e00\u4e2a\u63a5\u6536\u5b57\u7b26\u4e32\u4f5c\u4e3a\u59d3\u540d\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n
public class Person {\n    private String name;\n\n    public Person(String name) {\n        this.name = name;\n    }\n}<\/pre>\n
\u6211\u4eec\u53ef\u4ee5\u50cf\u8fd9\u6837\u4f7f\u7528\u6784\u9020\u51fd\u6570\u5f15\u7528\u6765\u521b\u5efa Person<\/code> \u5bf9\u8c61\u7684\u6570\u7ec4\uff1a<\/p>\n
String[] names = {\"John\", \"Mary\", \"Bob\"};\nPerson[] people = Arrays.stream(names)\n        .map(Person::new)  \/\/ \u4f7f\u7528\u6784\u9020\u51fd\u6570\u5f15\u7528\u521b\u5efa Person \u5bf9\u8c61\n        .toArray(Person[]::new);<\/pre>\n
\u8fd9\u5c06\u521b\u5efa\u4e00\u4e2a Person<\/code> \u6570\u7ec4\uff0c\u5176\u4e2d\u6bcf\u4e2a\u5143\u7d20\u90fd\u4ee3\u8868\u7ed9\u5b9a\u540d\u79f0\u7684\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n
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\u5982\u4f55\u4f7f\u7528\u6784\u9020\u51fd\u6570\u5f15\u7528\u5b9a\u4e49 Jav...<\/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-202968","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202968","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=202968"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202968\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202968"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202968"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202968"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}