{"id":459,"date":"2024-11-02T18:16:14","date_gmt":"2024-11-02T10:16:14","guid":{"rendered":"http:\/\/www.cmd137blog.top\/?p=459"},"modified":"2024-11-03T11:18:17","modified_gmt":"2024-11-03T03:18:17","slug":"java-%e6%8e%a5%e5%8f%a3-interface","status":"publish","type":"post","link":"http:\/\/www.cmd137blog.top\/?p=459","title":{"rendered":"JAVA-\u63a5\u53e3 interface"},"content":{"rendered":"\n<p>\u63a5\u53e3\u548c\u7c7b\u5f88\u76f8\u4f3c\uff0c\u4f46\u7edd\u5bf9\u4e0d\u662f\u7c7b\u3002\u7c7b\u63cf\u8ff0\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u63a5\u53e3\u5219\u5305\u542b\u7c7b\u8981\u5b9e\u73b0\u7684\u65b9\u6cd5\u3002<\/p>\n\n\n\n<p>\u58f0\u660e\u65f6\u7528 interface\u5173\u952e\u5b57\u800c\u975eclass\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;\u53ef\u89c1\u5ea6] interface \u63a5\u53e3\u540d\u79f0 &#91;extends \u5176\u4ed6\u7684\u63a5\u53e3\u540d] {\n        \/\/ \u58f0\u660e\u53d8\u91cf\n        \/\/ \u62bd\u8c61\u65b9\u6cd5\n}<\/code><\/pre>\n\n\n\n<p>\u5f53\u7c7b\u5b9e\u73b0\u63a5\u53e3\u7684\u65f6\u5019\uff0c\u7c7b\u8981\u5b9e\u73b0\u63a5\u53e3\u4e2d\u6240\u6709\u7684\u65b9\u6cd5\u3002\u5426\u5219\uff0c\u7c7b\u5fc5\u987b\u58f0\u660e\u4e3a\u62bd\u8c61\u7684\u7c7b\u3002<\/p>\n\n\n\n<p>\u7c7b\u4f7f\u7528implements\u5173\u952e\u5b57\u5b9e\u73b0\u63a5\u53e3\u3002\u5728\u7c7b\u58f0\u660e\u4e2d\uff0cImplements\u5173\u952e\u5b57\u653e\u5728class\u58f0\u660e\u540e\u9762\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u63a5\u53e3\u7279\u6027<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u63a5\u53e3\u4e2d\u6bcf\u4e00\u4e2a\u65b9\u6cd5\u4e5f\u662f\u9690\u5f0f\u62bd\u8c61\u7684,\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u4f1a\u88ab\u9690\u5f0f\u7684\u6307\u5b9a\u4e3a&nbsp;<strong>public abstract<\/strong>\uff08\u53ea\u80fd\u662f public abstract\uff0c\u5176\u4ed6\u4fee\u9970\u7b26\u90fd\u4f1a\u62a5\u9519\uff09\u3002<\/li>\n\n\n\n<li>\u63a5\u53e3\u4e2d\u53ef\u4ee5\u542b\u6709\u53d8\u91cf\uff0c\u4f46\u662f\u63a5\u53e3\u4e2d\u7684\u53d8\u91cf\u4f1a\u88ab\u9690\u5f0f\u7684\u6307\u5b9a\u4e3a&nbsp;<strong>public static final<\/strong>&nbsp;\u53d8\u91cf\uff08\u5e76\u4e14\u53ea\u80fd\u662f public\uff0c\u7528 private \u4fee\u9970\u4f1a\u62a5\u7f16\u8bd1\u9519\u8bef\uff09\u3002<\/li>\n\n\n\n<li>\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u662f\u4e0d\u80fd\u5728\u63a5\u53e3\u4e2d\u5b9e\u73b0\u7684\uff08\u5b9a\u4e49\u4e3a\u62bd\u8c61\u65b9\u6cd5\uff09\uff0c\u53ea\u80fd\u7531\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u6765\u5b9e\u73b0\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u3002<\/li>\n\n\n\n<li>\u63a5\u53e3\u53ef\u4ee5\u591a\u7ee7\u627f<\/li>\n<\/ul>\n\n\n\n<p>\u65b0\u589e\u7279\u6027\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>JDK7\u4ee5\u524d\uff1a\u63a5\u53e3\u4e2d\u53ea\u80fd\u5b9a\u4e49\u62bd\u8c61\u65b9\u6cd5\uff1b<\/li>\n\n\n\n<li>JDK8\uff1a\u63a5\u53e3\u53ef\u4ee5\u5b9a\u4e49\u6709\u65b9\u6cd5\u4f53\u7684\u65b9\u6cd5\uff08\u9ed8\u8ba4\uff08default\uff09\u3001\u9759\u6001\uff09\u3002\n<ul class=\"wp-block-list\">\n<li>\u9ed8\u8ba4\u65b9\u6cd5\uff1a\n<ul class=\"wp-block-list\">\n<li>\u89e3\u51b3\uff1a\u63a5\u53e3\u5347\u7ea7\uff1b<\/li>\n\n\n\n<li>\u683c\u5f0f\uff1apublic  <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">default<\/mark><\/strong> \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d\uff08&#8230;\uff09{&#8230;}\uff1b<\/li>\n\n\n\n<li>\u4e0d\u662f\u62bd\u8c61\u65b9\u6cd5\uff0c\u5728\u5b9e\u73b0\u7c7b\u4e2d\u4e0d\u5f3a\u5236\u91cd\u5199\u3002\u6709\u9700\u8981\u91cd\u5199\u65f6\uff0c\u53bb\u6389default\u5728\u91cd\u5199\u3002(\u4e0d\u91cd\u5199\u4e5f\u53ef\u4ee5\u76f4\u63a5\u8c03\u7528  )<\/li>\n\n\n\n<li>\u5982\u679c\u5b9e\u73b0\u4e86\u591a\u4e2a\u63a5\u53e3\uff0c\u591a\u4e2a\u63a5\u53e3\u4e2d\u5b58\u5728\u91cd\u540d\u9ed8\u8ba4\u65b9\u6cd5\uff0c\u5219\u5fc5\u987b\u91cd\u5199\u8be5\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u9759\u6001\u65b9\u6cd5\uff1a\n<ul class=\"wp-block-list\">\n<li>\u683c\u5f0f\uff1apublic  <strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-luminous-vivid-orange-color\">static<\/mark><\/strong> \u8fd4\u56de\u503c\u7c7b\u578b \u65b9\u6cd5\u540d\uff08&#8230;\uff09{&#8230;}\uff1b<\/li>\n\n\n\n<li>\u53ea\u80fd\u901a\u8fc7\u63a5\u53e3\u540d\u8c03\u7528\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>JDK9\uff1a\u53ef\u5b9a\u4e49\u79c1\u6709\u65b9\u6cd5\u3002\n<ul class=\"wp-block-list\">\n<li><em>\u5141\u8bb8\u5c06\u65b9\u6cd5\u5b9a\u4e49\u4e3a private\uff0c\u4f7f\u5f97\u67d0\u4e9b\u590d\u7528\u7684\u4ee3\u7801\u4e0d\u4f1a\u628a\u65b9\u6cd5\u66b4\u9732\u51fa\u53bb\u3002\u66f4\u591a\u5185\u5bb9\u53ef\u53c2\u8003&nbsp;<\/em><a href=\"https:\/\/www.runoob.com\/java\/java9-private-interface-methods.html\" target=\"_blank\" rel=\"noreferrer noopener\">Java 9 \u79c1\u6709\u63a5\u53e3\u65b9\u6cd5<\/a><em>\u3002<\/em><\/li>\n\n\n\n<li>\u76ee\u7684\uff1a\u53ea\u670d\u52a1\u4e8e\u63a5\u53e3\u7684\u51fd\u6570\uff0c\u4e0d\u60f3\u6cc4\u9732\u3002<\/li>\n\n\n\n<li>\u5206\u4e3a\u666e\u901a\u7684\u79c1\u6709\u65b9\u6cd5\uff08\u670d\u52a1\u4e8e\u9ed8\u8ba4\u65b9\u6cd5\uff09\u548c\u9759\u6001\u7684\u79c1\u6709\u65b9\u6cd5\uff08\u670d\u52a1\u4e8e\u9759\u6001\u65b9\u6cd5\uff09\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u9002\u914d\u5668\u8bbe\u8ba1\u6a21\u5f0f\uff1a<\/h2>\n\n\n\n<p><br><br>\u9002\u914d\u5668\u8bbe\u8ba1\u6a21\u5f0f\u662f\u4e00\u79cd\u7ed3\u6784\u6027\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u7528\u4e8e\u89e3\u51b3\u4e0d\u540c\u63a5\u53e3\u4e4b\u95f4\u7684\u517c\u5bb9\u6027\u95ee\u9898\u3002\u5b83\u5141\u8bb8\u5c06\u4e00\u4e2a\u7c7b\u7684\u63a5\u53e3\u8f6c\u6362\u6210\u5ba2\u6237\u7aef\u6240\u671f\u671b\u7684\u53e6\u4e00\u79cd\u63a5\u53e3\uff0c\u4ece\u800c\u4f7f\u539f\u672c\u7531\u4e8e\u63a5\u53e3\u4e0d\u517c\u5bb9\u800c\u65e0\u6cd5\u4e00\u8d77\u5de5\u4f5c\u7684\u7c7b\u80fd\u591f\u534f\u540c\u5de5\u4f5c\u3002<\/p>\n\n\n\n<p>\u9002\u914d\u5668\u7c7b\u901a\u8fc7\u7ec4\u5408\u6216\u7ee7\u627f\u7684\u65b9\u5f0f\uff0c\u5c06\u6e90\u7c7b\u7684\u529f\u80fd\u5305\u88c5\u5230\u76ee\u6807\u63a5\u53e3\u4e2d\u3002\u8fd9\u6837\uff0c\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7\u76ee\u6807\u63a5\u53e3\u4e0e\u6e90\u7c7b\u8fdb\u884c\u4ea4\u4e92\uff0c\u800c\u65e0\u9700\u4e86\u89e3\u6e90\u7c7b\u7684\u5177\u4f53\u5b9e\u73b0\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u793a\u4f8b\uff1a<\/h2>\n\n\n\n<h4 class=\"wp-block-heading\">Animal.java:<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>package main.Interface;\n\npublic abstract class Animal {\n    private String name;\n    private int age;\n\n    public Animal() {\n    }\n\n    public Animal(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public int getAge() {\n        return age;\n    }\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n\n    public abstract void eat();\n}\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">Swim.java:<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>package main.Interface;\n\npublic interface Swim {\n    public abstract void swim();\n    public default void swimtodeath(){\n        death();\n    }\n\n    private void death(){\n        System.out.println(\"gone\");\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">Frog.java:<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>package main.Interface;\n\npublic class Frog extends Animal implements Swim{\n    public Frog() {\n    }\n\n    public Frog(String name, int age) {\n        super(name, age);\n    }\n\n    @Override\n    public void eat(){\n        System.out.println(\"\u9752\u86d9\u5403\u866b\u5b50\");\n    }\n\n    @Override\n    public void swim(){\n        System.out.println(\"\u9752\u86d9\u86d9\u6cf3\");\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">Rabbit.java:<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>package main.Interface;\n\npublic class Rabbit extends Animal{\n    public Rabbit() {\n    }\n\n    public Rabbit(String name, int age) {\n        super(name, age);\n    }\n\n    @Override\n    public void eat(){\n        System.out.println(\"\u5154\u5b50\u5403\u80e1\u841d\u535c\");\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">Dog.java:<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>package main.Interface;\n\npublic class Dog extends Animal implements Swim{\n    public Dog() {\n    }\n\n    public Dog(String name, int age) {\n        super(name, age);\n    }\n\n    @Override\n    public void eat(){\n        System.out.println(\"\u72d7\u5403\u5c4e\");\n    }\n\n    @Override\n    public void swim(){\n        System.out.println(\"\u72d7\u5228\u6e38\u6cf3\");\n    }\n\n    @Override\n    public void swimtodeath(){\n        System.out.println(\"DOG:FUCK!\");\n    }\n\n\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">Test.java:<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>package main.Interface;\n\npublic class InterfaceTest {\n    public static void main(String&#91;] args) {\n        Dog dog=new Dog();\n        Frog frog =new Frog();\n        Rabbit rabbit=new Rabbit();\n\n        dog.eat();\n        frog.eat();\n        rabbit.eat();\n\n        dog.swim();\n        frog.swim();\n\n        dog.swimtodeath();\n        frog.swimtodeath();\n    }\n}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u8fd0\u884c\u7ed3\u679c\uff1a<\/h4>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u72d7\u5403\u5c4e<br>\u9752\u86d9\u5403\u866b\u5b50<br>\u5154\u5b50\u5403\u80e1\u841d\u535c<br>\u72d7\u5228\u6e38\u6cf3<br>\u9752\u86d9\u86d9\u6cf3<br>DOG:FUCK!<br>gone<\/p>\n<\/blockquote>\n\n\n\n<h4 class=\"wp-block-heading\">\u5206\u6790\uff1a<\/h4>\n\n\n\n<p>\u72d7\u3001\u5154\u3001\u9752\u86d9\u90fd\u7ee7\u627f\u4e8e\u62bd\u8c61\u7c7bAnimal\uff0c\u90fd\u9700\u8981\u91cd\u5199\u62bd\u8c61\u65b9\u6cd5eat\uff08\uff09\uff1b<\/p>\n\n\n\n<p>Swim\u4e2d\uff1aswimtodeat\u4e3a\u9ed8\u8ba4\u65b9\u6cd5\uff0c\u65e0\u9700\u91cd\u5199\u3002\u5bf9\u4e8e\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u8c03\u7528\u4e86\u63a5\u53e3\u5185\u7684\u79c1\u6709\u65b9\u6cd5death\uff08\uff09\uff1b<\/p>\n\n\n\n<p>\u72d7\u3001\u9752\u86d9\u90fd\u5b9e\u73b0\u4e86Swim\u8fd9\u4e2a\u63a5\u53e3\uff0c\u5b9e\u73b0\u4e86swim\uff08\uff09\u7684\u591a\u6001\u3002\u5176\u4e2d\u72d7\u91cd\u5199\u4e86swimtodeath\uff08\uff09\u3002\u9752\u86d9\u5b9e\u73b0\u9ed8\u8ba4\u7684swimtodeath\uff08\uff09\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a5\u53e3\u548c\u7c7b\u5f88\u76f8\u4f3c\uff0c\u4f46\u7edd\u5bf9\u4e0d\u662f\u7c7b\u3002\u7c7b\u63cf\u8ff0\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002\u63a5\u53e3\u5219\u5305\u542b\u7c7b\u8981\u5b9e\u73b0\u7684\u65b9\u6cd5\u3002 \u58f0\u660e\u65f6\u7528 interface [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[56],"tags":[25],"class_list":["post-459","post","type-post","status-publish","format-standard","hentry","category-java","tag-java"],"_links":{"self":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/459","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=459"}],"version-history":[{"count":4,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/459\/revisions"}],"predecessor-version":[{"id":467,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/459\/revisions\/467"}],"wp:attachment":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=459"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=459"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}