{"id":1429,"date":"2022-11-03T23:01:51","date_gmt":"2022-11-03T15:01:51","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1429"},"modified":"2022-11-27T12:39:44","modified_gmt":"2022-11-27T04:39:44","slug":"lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e8%af%ad%e6%b3%95%e7%9a%84%e4%bd%bf%e7%94%a81%e3%80%81lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e8%af%ad%e6%b3%95%e7%9a%84%e4%bd%bf%e7%94%a82%e3%80%81%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1429","title":{"rendered":"Lambda\u8868\u8fbe\u5f0f\u8bed\u6cd5\u7684\u4f7f\u75281\u3001Lambda\u8868\u8fbe\u5f0f\u8bed\u6cd5\u7684\u4f7f\u75282\u3001\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u4ecb\u7ecd"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P669;\r\n\r\nimport org.junit.jupiter.api.Test;\r\n\r\nimport java.util.ArrayList;\r\nimport java.util.Comparator;\r\nimport java.util.function.Consumer;\r\n\r\n\/**\r\n * Lambda\u8868\u8fbe\u5f0f\u7684\u4f7f\u7528\r\n *\r\n * 1. \u4e3e\u4f8b\uff1a(o1,o2) -> Integer.compare(o1,o2);\r\n * 2. \u683c\u5f0f\uff1a\r\n *      -> : lambda\u64cd\u4f5c\u7b26 \u6216 \u7bad\u5934\u64cd\u4f5c\u7b26\r\n *      -> \u5de6\u8fb9\uff1alambda\u5f62\u53c2\u5217\u8868 (\u5176\u5b9e\u5c31\u662f\u63a5\u53e3\u4e2d\u7684\u62bd\u8c61\u65b9\u6cd5\u7684\u5f62\u53c2\u5217\u8868)\r\n *      -> \u53f3\u8fb9\uff1alambda\u4f53 (\u5176\u5b9e\u5c31\u662f\u91cd\u5199\u7684\u62bd\u8c61\u65b9\u6cd5\u7684\u65b9\u6cd5\u4f53)\r\n *\r\n * 3. Lambda\u8868\u8fbe\u5f0f\u7684\u4f7f\u7528\uff1a (\u5206\u4e3a6\u79cd\u60c5\u51b5\u4ecb\u7ecd)\r\n *\r\n *      \u603b\u7ed3\uff1a\r\n *      -> \u5de6\u8fb9\uff1alambda\u5f62\u53c2\u5217\u8868\u7684\u53c2\u6570\u7c7b\u578b\u53ef\u4ee5\u7701\u7565 (\u7c7b\u578b\u63a8\u65ad)\uff1b\u5982\u679cLambda\u5f62\u53c2\u5217\u8868\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\uff0c\u5176\u4e00\u5bf9()\u4e5f\u53ef\u4ee5\u7701\u7565\r\n *      -> \u53f3\u8fb9\uff1aLambda\u4f53\u5e94\u8be5\u4f7f\u7528\u4e00\u5bf9{}\u5305\u88f9\uff1b\u5982\u679clambda\u4f53\u53ea\u6709\u4e00\u6761\u6267\u884c\u8bed\u53e5\uff08\u53ef\u80fd\u662freturn\u8bed\u53e5\uff09\uff0c\u7701\u7565\u8fd9\u4e00\u5bf9{}\u548creturn\u5173\u952e\u5b57\r\n *\r\n * 4. Lambda\u8868\u8fbe\u5f0f\u7684\u672c\u8d28\uff1a\u4f5c\u4e3a\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u5b9e\u4f8b\r\n *\r\n * 5. \u5982\u679c\u4e00\u4e2a\u63a5\u53e3\u4e2d\uff0c\u53ea\u58f0\u660e\u4e86\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff0c\u5219\u6b64\u63a5\u53e3\u5c31\u79f0\u4e3a\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u6211\u4eec\u53ef\u4ee5\u5728\u4e00\u4e2a\u63a5\u53e3\u4e0a\u4f7f\u7528 @FunctionalInterface \u6ce8\u89e3\uff0c\r\n *      \u8fd9\u6837\u505a\u53ef\u4ee5\u68c0\u67e5\u5b83\u662f\u5426\u662f\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\r\n *\r\n * 6. \u6240\u4ee5\u4ee5\u524d\u7528\u533f\u540d\u5b9e\u73b0\u7c7b\u8868\u793a\u7684\u73b0\u5728\u90fd\u53ef\u4ee5\u7528Lambda\u8868\u8fbe\u5f0f\u6765\u5199\u3002\r\n *\r\n * @author RichieZhang\r\n * @create 2022-11-03 \u4e0b\u5348 3:20\r\n *\/\r\npublic class LambdaTest1 {\r\n\r\n    \/\/\u8bed\u6cd5\u683c\u5f0f\u4e00\uff1a\u65e0\u53c2\uff0c\u65e0\u8fd4\u56de\u503c\r\n    @Test\r\n    public void test1(){\r\n\r\n        Runnable r1 = new Runnable() {\r\n            @Override\r\n            public void run() {\r\n                System.out.println(\"\u6211\u7231\u5317\u4eac\u5929\u5b89\u95e8\");\r\n            }\r\n        };\r\n\r\n        r1.run();\r\n\r\n        System.out.println(\"***************************\");\r\n\r\n        Runnable r2 = () -> {\r\n            System.out.println(\"\u6211\u7231\u5317\u4eac\u6545\u5bab\");\r\n        };\r\n\r\n        r2.run();\r\n\r\n    }\r\n\r\n    \/\/\u8bed\u6cd5\u683c\u5f0f\u4e8c\uff1aLambda \u9700\u8981\u4e00\u4e2a\u53c2\u6570\uff0c\u4f46\u662f\u6ca1\u6709\u8fd4\u56de\u503c\r\n    @Test\r\n    public void test2(){\r\n\r\n        Consumer&lt;String> con = new Consumer&lt;String>() {\r\n            @Override\r\n            public void accept(String s) {\r\n                System.out.println(s);\r\n            }\r\n        };\r\n        con.accept(\"\u8c0e\u8a00\u548c\u8a93\u8a00\u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f\");\r\n\r\n        System.out.println(\"***************************\");\r\n\r\n        Consumer&lt;String> con1 = (String s) -> {\r\n            System.out.println(s);\r\n        };\r\n        con1.accept(\"\u4e00\u4e2a\u662f\u542c\u5f97\u4eba\u5f53\u771f\u4e86\uff0c\u4e00\u4e2a\u662f\u8bf4\u7684\u4eba\u5f53\u771f\u4e86\");\r\n    }\r\n\r\n    \/\/\u8bed\u6cd5\u683c\u5f0f\u4e09\uff1a\u6570\u636e\u7c7b\u578b\u53ef\u4ee5\u7701\u7565\uff0c\u56e0\u4e3a\u53ef\u7531\u7f16\u8bd1\u5668\u63a8\u65ad\u5f97\u51fa\uff0c\u79f0\u4e3a\u201c\u7c7b\u578b\u63a8\u65ad\u201d\r\n    @Test\r\n    public void test3(){\r\n        Consumer&lt;String> con1 = (String s) -> {\r\n            System.out.println(s);\r\n        };\r\n        con1.accept(\"\u4e00\u4e2a\u662f\u542c\u5f97\u4eba\u5f53\u771f\u4e86\uff0c\u4e00\u4e2a\u662f\u8bf4\u7684\u4eba\u5f53\u771f\u4e86\");\r\n\r\n        System.out.println(\"***************************\");\r\n\r\n        Consumer&lt;String> con2 = (s) -> {\r\n            System.out.println(s);\r\n        };\r\n        con2.accept(\"\u4e00\u4e2a\u662f\u542c\u5f97\u4eba\u5f53\u771f\u4e86\uff0c\u4e00\u4e2a\u662f\u8bf4\u7684\u4eba\u5f53\u771f\u4e86\");\r\n    }\r\n\r\n    @Test\r\n    public void test4(){\r\n        ArrayList&lt;String> list = new ArrayList&lt;>();\/\/\u7c7b\u578b\u63a8\u65ad\r\n\r\n        int&#91;] arr = {1,2,3};\/\/\u7c7b\u578b\u63a8\u65ad\r\n\r\n    }\r\n\r\n    \/\/\u8bed\u6cd5\u683c\u5f0f\u56db\uff1aLambda \u82e5\u53ea\u9700\u8981\u4e00\u4e2a\u53c2\u6570\u65f6\uff0c\u53c2\u6570\u7684\u5c0f\u62ec\u53f7\u53ef\u4ee5\u7701\u7565\r\n    @Test\r\n    public void test5(){\r\n        Consumer&lt;String> con1 = (s) -> {\r\n            System.out.println(s);\r\n        };\r\n        con1.accept(\"\u4e00\u4e2a\u662f\u542c\u5f97\u4eba\u5f53\u771f\u4e86\uff0c\u4e00\u4e2a\u662f\u8bf4\u7684\u4eba\u5f53\u771f\u4e86\");\r\n\r\n        System.out.println(\"***************************\");\r\n\r\n        Consumer&lt;String> con2 = s -> {\r\n            System.out.println(s);\r\n        };\r\n        con2.accept(\"\u4e00\u4e2a\u662f\u542c\u5f97\u4eba\u5f53\u771f\u4e86\uff0c\u4e00\u4e2a\u662f\u8bf4\u7684\u4eba\u5f53\u771f\u4e86\");\r\n\r\n    }\r\n\r\n    \/\/\u8bed\u6cd5\u683c\u5f0f\u4e94\uff1alambda \u9700\u8981\u4e24\u4e2a\u6216\u4ee5\u4e0a\u7684\u53c2\u6570\uff0c\u591a\u6761\u6267\u884c\u8bed\u53e5\uff0c\u5e76\u4e14\u53ef\u4ee5\u6709\u8fd4\u56de\u503c\r\n    @Test\r\n    public void test6(){\r\n\r\n        Comparator&lt;Integer> com1 = new Comparator&lt;Integer>() {\r\n            @Override\r\n            public int compare(Integer o1, Integer o2) {\r\n                System.out.println(o1);\r\n                System.out.println(o2);\r\n                return o1.compareTo(o2);\r\n            }\r\n        };\r\n\r\n        System.out.println(com1.compare(12, 21));\r\n\r\n        System.out.println(\"***************************\");\r\n\r\n        Comparator&lt;Integer> com2 = (o1,o2) -> {\r\n            System.out.println(o1);\r\n            System.out.println(o2);\r\n            return o1.compareTo(o2);\r\n        };\r\n\r\n        System.out.println(com2.compare(12, 6));\r\n    }\r\n\r\n    \/\/\u8bed\u6cd5\u683c\u5f0f\u516d\uff1a\u5f53 Lambda \u4f53\u53ea\u6709\u4e00\u6761\u8bed\u53e5\u65f6\uff0creturn \u4e0e\u5927\u62ec\u53f7\u82e5\u6709\uff0c\u90fd\u53ef\u4ee5\u8003\u8651\u7701\u7565\r\n    @Test\r\n    public void test7(){\r\n\r\n        Comparator&lt;Integer> com1 = (o1,o2) -> {\r\n            return o1.compareTo(o2);\r\n        };\r\n\r\n        System.out.println(com1.compare(12, 6));\r\n\r\n        System.out.println(\"***************************\");\r\n\r\n        Comparator&lt;Integer> com2 = (o1,o2) -> o1.compareTo(o2);\r\n\r\n        System.out.println(com2.compare(12, 21));\r\n\r\n    }\r\n\r\n    @Test\r\n    public void test8(){\r\n\r\n        Consumer&lt;String> con1 = s -> {\r\n            System.out.println(s);\r\n        };\r\n        con1.accept(\"\u4e00\u4e2a\u662f\u542c\u5f97\u4eba\u5f53\u771f\u4e86\uff0c\u4e00\u4e2a\u662f\u8bf4\u7684\u4eba\u5f53\u771f\u4e86\");\r\n\r\n        System.out.println(\"***************************\");\r\n\r\n        Consumer&lt;String> con2 = s -> System.out.println(s);\r\n        con2.accept(\"\u4e00\u4e2a\u662f\u542c\u5f97\u4eba\u5f53\u771f\u4e86\uff0c\u4e00\u4e2a\u662f\u8bf4\u7684\u4eba\u5f53\u771f\u4e86\");\r\n    }\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P669;\r\n\r\n\/**\r\n * \u81ea\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3\r\n *\r\n * @author RichieZhang\r\n * @create 2022-11-03 \u4e0b\u5348 4:20\r\n *\/\r\n\r\n@FunctionalInterface\r\npublic interface MyInterface {\r\n\r\n    void method1();\r\n\r\n\/\/    void method2();\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[46],"class_list":["post-1429","post","type-post","status-publish","format-standard","hentry","category-java-code","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1429"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1429"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1429\/revisions"}],"predecessor-version":[{"id":1430,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1429\/revisions\/1430"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1429"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1429"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1429"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}