{"id":203036,"date":"2025-05-22T08:14:24","date_gmt":"2025-05-22T00:14:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203036\/"},"modified":"2025-05-22T08:14:24","modified_gmt":"2025-05-22T00:14:24","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8java-lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e5%ae%9e%e7%8e%b0%e5%9b%9e%e8%b0%83%e5%87%bd%e6%95%b0%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203036\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528Java lambda\u8868\u8fbe\u5f0f\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u4f7f\u7528Java lambda\u8868\u8fbe\u5f0f\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\uff1f<\/h1>\n

\u5077\u5077\u52aa\u529b\uff0c\u6084\u65e0\u58f0\u606f\u5730\u53d8\u5f3a\uff0c\u7136\u540e\u60ca\u8273\u6240\u6709\u4eba\uff01\u54c8\u54c8\uff0c\u5c0f\u4f19\u4f34\u4eec\u53c8\u6765\u5b66\u4e60\u5566~\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u300a\u5982\u4f55\u4f7f\u7528Java lambda\u8868\u8fbe\u5f0f\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\uff1f\u300b<\/span>\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u4f1a\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u4e0d\u77e5\u9053\u5927\u5bb6\u5bf9\u5176\u90fd\u6709\u591a\u5c11\u4e86\u89e3\uff0c\u4e0b\u9762\u6211\u4eec\u5c31\u4e00\u8d77\u6765\u770b\u4e00\u5427\uff01\u5f53\u7136\uff0c\u975e\u5e38\u5e0c\u671b\u5927\u5bb6\u80fd\u591a\u591a\u8bc4\u8bba\uff0c\u7ed9\u51fa\u5408\u7406\u7684\u5efa\u8bae\uff0c\u6211\u4eec\u4e00\u8d77\u5b66\u4e60\uff0c\u4e00\u8d77\u8fdb\u6b65\uff01<\/p>\n

\u4f7f\u7528 Java lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\u7684\u65b9\u6cd5\uff1a\u4f7f\u7528\u57fa\u672c\u8bed\u6cd5\uff1a(parameters) -> { body}\u3002\u5b9a\u4e49\u56de\u8c03\u51fd\u6570\u7684\u903b\u8f91\u5728 body \u4e2d\u3002\u5c06 lambda \u8868\u8fbe\u5f0f\u4f20\u9012\u7ed9\u9700\u8981\u56de\u8c03\u51fd\u6570\u7684 API \u6216\u65b9\u6cd5\u3002\u5f53\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c\u56de\u8c03\u51fd\u6570\u5c06\u88ab\u6267\u884c\uff0c\u6267\u884c\u5176\u5b9a\u4e49\u7684\u903b\u8f91\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u4f7f\u7528 Java lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0\u56de\u8c03\u51fd\u6570<\/strong><\/p>\n

\u56de\u8c03\u51fd\u6570\u5728\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u88ab\u5e7f\u6cdb\u5e94\u7528\uff0c\u7528\u4e8e\u5728\u4e8b\u4ef6\u53d1\u751f\u65f6\u6267\u884c\u7279\u5b9a\u7684\u4ee3\u7801\u3002Java lambda \u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u4e00\u79cd\u7b80\u6d01\u5f3a\u5927\u7684\u65b9\u5f0f\u6765\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\u3002<\/p>\n

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

Java lambda \u8868\u8fbe\u5f0f\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

(parameters) -> { body }<\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • parameters<\/code> \u662f\u4f20\u9012\u7ed9 lambda \u8868\u8fbe\u5f0f\u7684\u53c2\u6570\u5217\u8868\uff08\u53ef\u9009\uff09\u3002<\/li>\n
  • body<\/code> \u662f lambda \u8868\u8fbe\u5f0f\u7684\u6267\u884c\u903b\u8f91\u3002<\/li>\n<\/ul>\n
    \u793a\u4f8b<\/strong><\/p>\n
    \u8003\u8651\u4ee5\u4e0b\u5e26\u6709\u56de\u8c03\u51fd\u6570\u7684\u7b80\u5355\u4e8b\u4ef6\u76d1\u542c\u5668\u754c\u9762\uff1a<\/p>\n
    interface EventListener {\n    void onEvent(String message);\n}<\/pre>\n
    \u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u5b9e\u73b0\u4e00\u4e2a\u56de\u8c03\u51fd\u6570\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
    EventListener listener = message -> System.out.println(\"Event occurred: \" + message);<\/pre>\n
    \u8fd9\u4e2a lambda \u8868\u8fbe\u5f0f\u63a5\u6536\u4e00\u4e2a message<\/code> \u53c2\u6570\u5e76\u6253\u5370\u4e00\u6761\u5305\u542b\u6d88\u606f\u7684\u4e8b\u4ef6\u6d88\u606f\u3002<\/p>\n
    \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
    \u73b0\u5728\uff0c\u8003\u8651\u4e00\u4e2a\u4f7f\u7528\u6309\u94ae\u5b9e\u73b0\u7b80\u5355 GUI \u7684\u5b9e\u6218\u793a\u4f8b\uff1a<\/p>\n
    import java.awt.event.ActionEvent;\nimport java.awt.event.ActionListener;\n\nimport javax.swing.JButton;\nimport javax.swing.JFrame;\nimport javax.swing.JPanel;\n\npublic class CallbackExample {\n\n    public static void main(String[] args) {\n        \/\/ \u521b\u5efa\u4e00\u4e2a JFrame \u7a97\u53e3\n        JFrame frame = new JFrame(\"Callback Example\");\n        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);\n\n        \/\/ \u521b\u5efa\u4e00\u4e2a\u6309\u94ae\n        JButton button = new JButton(\"Click\");\n\n        \/\/ \u521b\u5efa\u4e00\u4e2a JPanel \u5bb9\u5668\n        JPanel panel = new JPanel();\n        panel.add(button);\n\n        \/\/ \u6dfb\u52a0\u6309\u94ae\u70b9\u51fb\u76d1\u542c\u5668\n        button.addActionListener(e -> System.out.println(\"Button clicked!\"));\n\n        \/\/ \u6dfb\u52a0 JPanel \u5230\u7a97\u53e3\n        frame.add(panel);\n\n        \/\/ \u8bbe\u7f6e\u7a97\u53e3\u5927\u5c0f\u548c\u53ef\u89c1\u6027\n        frame.setSize(300, 200);\n        frame.setVisible(true);\n    }\n}<\/pre>\n
    \u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a ActionListener<\/code>\uff0c\u5b83\u5728\u6309\u94ae\u70b9\u51fb\u4e8b\u4ef6\u53d1\u751f\u65f6\u8c03\u7528 System.out.println<\/code> \u65b9\u6cd5\u6253\u5370\u4e00\u6761\u6d88\u606f\u3002lambda \u8868\u8fbe\u5f0f\u88ab\u7528\u4f5c ActionListener<\/code>\uff0c\u4ece\u800c\u7b80\u5316\u4e86\u4ee3\u7801\u5e76\u63d0\u9ad8\u4e86\u53ef\u8bfb\u6027\u3002<\/p>\n
    \u4eca\u5929\u5173\u4e8e\u300a\u5982\u4f55\u4f7f\u7528Java lambda\u8868\u8fbe\u5f0f\u5b9e\u73b0\u56de\u8c03\u51fd\u6570\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u4f7f\u7528Java lambda\u8868...<\/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-203036","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203036","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=203036"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203036\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203036"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}