{"id":2110,"date":"2020-08-17T15:16:59","date_gmt":"2020-08-17T07:16:59","guid":{"rendered":"http:\/\/127.0.0.2\/?p=2110"},"modified":"2020-08-18T15:07:55","modified_gmt":"2020-08-18T07:07:55","slug":"2020java%e6%95%99%e7%a8%8b%ef%bc%9a%e5%86%85%e9%83%a8%e7%b1%bb%e4%b8%8e%e5%b8%b8%e7%94%a8%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=2110","title":{"rendered":"2020java\u6559\u7a0b\uff1a\u5185\u90e8\u7c7b\u4e0e\u5e38\u7528\u7c7b"},"content":{"rendered":"

\u5185\u90e8\u7c7b\u4e0e\u5e38\u7528\u7c7b<\/h3>\n

\u5185\u90e8\u7c7b<\/p>\n

\u5185\u90e8\u7c7b\u7684\u5206\u7c7b
\n\u6210\u5458\u5185\u90e8\u7c7b\u3001\u9759\u6001\u5185\u90e8\u7c7b\u3001\u5c40\u90e8\u5185\u90e8\u7c7b\u3001\u533f\u540d\u5185\u90e8\u7c7b<\/p>\n

\u4ec0\u4e48\u662f\u5185\u90e8\u7c7b
\n\u6982\u5ff5\uff1a\u5728\u4e00\u4e2a\u7684\u5185\u90e8\u5728\u5b9a\u4e49\u4e00\u4e2a\u5b8c\u6574\u7684\u7c7b<\/p>\n

class Outer{\r\n    class Inner{\r\n        \r\n    }\r\n}<\/pre>\n
\u7279\u70b9\uff1a
\n\u7f16\u8bd1\u4e4b\u540e\u53ef\u751f\u6210\u72ec\u7acb\u7684\u5b57\u8282\u7801\u6587\u4ef6(Outer$Inner.class\uff0cOuter.class)
\n\u5185\u90e8\u7c7b\u53ef\u76f4\u63a5\u8bbf\u95ee\u5916\u90e8\u7c7b\u7684\u79c1\u6709\u6210\u5458\uff0c\u800c\u4e0d\u7834\u574f\u5c01\u88c5<\/p>\n
class Outer{\r\n    class Inner{\r\n        int b;\r\n        public void m2(){\r\n            System.out.println(\"inner m2()\"+b);\r\n        }\r\n    }\r\n}<\/pre>\n
\u53ef\u4e3a\u5916\u90e8\u7c7b\u63d0\u4f9b\u5fc5\u8981\u7684\u5185\u90e8\u529f\u80fd\u7ec4\u4ef6<\/p>\n
\u6210\u5458\u5185\u90e8\u7c7b
\n\u5728\u7c7b\u7684\u5185\u90e8\u5b9a\u4e49\uff0c\u4e0e\u5b9e\u4f8b\u53d8\u91cf\u3001\u5b9e\u4f8b\u65b9\u6cd5\u540c\u7ea7\u522b\u7684\u7c7b<\/p>\n
\u5728\u5916\u90e8\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\u90e8\u5206\uff0c\u521b\u5efa\u5185\u90e8\u5bf9\u8c61\u65f6\uff0c\u5fc5\u987b\u4f9d\u8d56\u5916\u90e8\u7c7b\u5bf9\u8c61
\nOut out=new Oout();
\nInner in=out.new Inner();<\/p>\n
\u5f53\u5916\u90e8\u7c7b\u3001\u5185\u90e8\u7c7b\u5b58\u5728\u91cd\u540d\u65f6\uff0c\u4f1a\u4f18\u5148\u8bbf\u95ee\u5185\u90e8\u7c7b\u5c5e\u6027<\/p>\n
class Outer{\r\n    private int a=10;\r\n    \/**\r\n    \u6210\u5458\u5185\u90e8\u7c7b\uff0c\u4f9d\u8d56\u5185\u90e8\u5bf9\u5bf9\u8c61\r\n    *\/\r\n    class Inner{\r\n        int a=20;\r\n        public void m2(){\r\n            int a=30;\r\n            \/\/\u5185\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u81ea\u8eab\u5c40\u90e8\u53d8\u91cf\r\n            System.out.println(a);\r\n            \/\/\u5185\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u5185\u90e8\u7c7b\u7684\u5b9e\u4f8b\u53d8\u91cf\r\n            System.out.println(this.a);\r\n            \/\/\u5185\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u5916\u90e8\u7c7b\u5b9e\u4f8b\u53d8\u91cf\r\n            System.out.println(Outer.this.a);\r\n        }\r\n    }\r\n}<\/pre>\n
\u6210\u5458\u5185\u90e8\u7c7b\u4e0d\u80fd\u5b9a\u4e49\u9759\u6001\u6210\u5458<\/p>\n
\n
\u9759\u6001\u5185\u90e8\u7c7b<\/p>\n
\u4e0d\u4f9d\u8d56\u5916\u90e8\u7c7b\u5bf9\u8c61\uff0c\u53ef\u76f4\u63a5\u521b\u5efa\u6216\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\uff0c\u53ef\u58f0\u660e\u9759\u6001\u6210\u5458
\n\u53ea\u80fd\u76f4\u63a5\u8bbf\u95ee\u5916\u90e8\u7c7b\u7684\u9759\u6001\u6210\u5458(\u5b9e\u4f8b\u6210\u5458\u9700\u5b9e\u4f8b\u5316\u5916\u90e8\u7c7b\u5bf9\u8c61)<\/p>\n
public class demos{\r\n    public static void main(String[] args) {\r\n        \/\/\u5916\u90e8\u7c7b\u7684\u9759\u6001\u5c5e\u6027\r\n        System.out.println(Outer.a);\r\n        \/\/\u5916\u90e8\u7c7b\u7684\u9759\u6001\u65b9\u6cd5\r\n        Outer.m1();\r\n        \/\/\u9759\u6001\u5185\u90e8\u7c7b \u521b\u5efa\uff0c\u4e0d\u4f9d\u8d56\u5916\u90e8\u7c7b\u7684\u5bf9\u8c61\r\n        \/\/\u521b\u5efa\u9759\u6001\u5185\u90e8\u7c7b\u5bf9\u8c61\u65f6\uff0c\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u5b8c\u6574\u540d\u79f0\u8fdb\u884c\u521b\u5efa\r\n        Outer.Inner in=new Outer.Inner();\r\n        \/\/\u521b\u5efa\u5185\u90e8\u7c7b\u5bf9\u8c61\u540e\uff0c\u8bbf\u95ee\u5b9e\u4f8b\u5c5e\u6027\u548c\u65b9\u6cd5\r\n        System.out.println(in.a);\r\n        in.m2();\r\n        \/\/\u989d\u5916\u6bd4\u6210\u5458\u5185\u90e8\u7c7b\u591a\u4e86\u4e00\u4e2a\u5b9a\u4e49\u7684\u5185\u5bb9(\u9759\u6001\u5c5e\u6027\u548c\u9759\u6001\u65b9\u6cd5)\r\n        \/\/\u901a\u8fc7\u5916\u90e8\u7c7b\u7c7b\u540d.\u5185\u90e8\u7c7b\u7c7b\u540d.\u5185\u90e8\u7c7b\u7684\u9759\u6001\u5c5e\u6027\r\n        System.out.println(Outer.Inner.str);\r\n        \/\/\u901a\u8fc7\u5916\u90e8\u7c7b\u7c7b\u540d.\u5185\u90e8\u7c7b\u7c7b\u540d.\u5185\u90e8\u7c7b\u7684\u9759\u6001\u65b9\u6cd5\r\n        Outer.Inner.m3();\r\n    }\r\n}\r\nclass Outer{\r\n    static int a=10;\r\n    static class Inner{\r\n        int a=20;\r\n        static String str=\"abc\";\r\n        public void m2(){\r\n            System.out.println(\"Inner m2()\");\r\n        }\r\n        public static void m3(){\r\n            System.out.println(\"Inner m3()\");\r\n        }\r\n    }\r\n    static void m1(){\r\n        System.out.println(\"Outer m1()\");\r\n    }\r\n}<\/pre>\n
\n
\u5c40\u90e8\u5185\u90e8\u7c7b<\/p>\n
\u5b9a\u4e49\u5728\u5916\u90e8\u7c7b\u65b9\u6cd5\u4e2d\uff0c\u4f5c\u7528\u8303\u56f4\u548c\u521b\u5efa\u5bf9\u8c61\u8303\u56f4\u4ec5\u9650\u4e8e\u5f53\u524d\u65b9\u6cd5
\n\u5c40\u90e8\u5185\u90e8\u7c7b\u8bbf\u95ee\u5916\u90e8\u7c7b\u5f53\u524d\u65b9\u6cd5\u7684\u5c40\u90e8\u53d8\u91cf\u65f6\uff0c\u56e0\u65e0\u6cd5\u4fdd\u969c\u53d8\u91cf\u7684\u751f\u547d\u5468\u671f\u4e0e\u81ea\u8eab\u76f8\u540c\uff0c\u53d8\u91cf\u5fc5\u987b\u4fee\u9970\u4e3afinal
\n\u9650\u5236\u7c7b\u7684\u4f7f\u7528\u8303\u56f4<\/p>\n
\u533f\u540d\u5185\u90e8\u7c7b<\/p>\n
\u6ca1\u6709\u7c7b\u540d\u7684\u5c40\u90e8\u5185\u90e8\u7c7b(\u4e00\u5207\u7279\u5f81\u90fd\u4e0e\u5c40\u90e8\u5185\u90e8\u7c7b\u76f8\u540c)
\n\u5fc5\u987b\u7ee7\u627f\u4e00\u4e2a\u7236\u7c7b\u6216\u5b9e\u73b0\u4e00\u4e2a\u63a5\u53e3
\n\u5b9a\u4e49\u7c7b\u3001\u5b9e\u73b0\u7c7b\u3001\u521b\u5efa\u5bf9\u8c61\u7684\u8bed\u6cd5\u5408\u5e76\uff0c\u53ea\u80fd\u521b\u5efa\u4e00\u4e2a\u8be5\u7c7b\u7684\u5bf9\u8c61
\n\u4f18\u70b9\uff1a\u51cf\u5c11\u4ee3\u7801\u91cf
\n\u7f3a\u70b9\uff1a\u53ef\u8bfb\u6027\u8f83\u5dee<\/p>\n
public class demos{\r\n    public static void main(String[] args) {\r\n        Teacher t = School.RandomT(3);\r\n        t.tech();\r\n    }\r\n}\r\nclass School{\r\n    public static Teacher RandomT(int n){\r\n        class Gt extends Teacher{\r\n            @Override\r\n            public void tech() {\r\n                System.out.println(\"\u9ad8\u7ea7\u8001\u5e08\u6b63\u5728\u4e0a\u8bfe\u3002\u3002\u3002\");\r\n            }\r\n        }\r\n        Teacher t=null;\r\n        if(n%2==0){\r\n            \/\/\u533f\u540d\u5185\u90e8\u7c7b\r\n            t=new Teacher(){\r\n                @Override\r\n                public void tech() {\r\n                    System.out.println(\"\u521d\u7ea7\u8001\u5e08\u6b63\u5728\u4e0a\u8bfe\u3002\u3002\u3002\");\r\n                }\r\n            };\r\n        }else{\r\n            t=new Gt();\r\n        }\r\n        return t;\r\n    }\r\n}\r\nabstract class Teacher{\r\n    public abstract void tech();\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u5185\u90e8\u7c7b\u4e0e\u5e38\u7528\u7c7b \u5185\u90e8\u7c7b \u5185\u90e8\u7c7b\u7684\u5206\u7c7b \u6210\u5458\u5185\u90e8\u7c7b\u3001\u9759\u6001\u5185\u90e8\u7c7b\u3001\u5c40\u90e8\u5185\u90e8\u7c7b\u3001\u533f\u540d\u5185\u90e8\u7c7b \u4ec0\u4e48\u662f\u5185\u90e8\u7c7b \u6982\u5ff5\uff1a\u5728\u4e00 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2110","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2110"}],"version-history":[{"count":7,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2110\/revisions"}],"predecessor-version":[{"id":2123,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2110\/revisions\/2123"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}