{"id":1198,"date":"2026-04-10T08:43:20","date_gmt":"2026-04-10T00:43:20","guid":{"rendered":"https:\/\/yunyanglib.cn\/?p=1198"},"modified":"2026-04-10T08:43:21","modified_gmt":"2026-04-10T00:43:21","slug":"%e3%80%90java%e3%80%91java%e6%8e%a5%e5%8f%a3%e5%85%a8%e6%96%b9%e4%bd%8d%e8%a7%a3%e6%9e%90%ef%bc%9a%e4%bb%8e%e5%9f%ba%e7%a1%80%e5%88%b0%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f%e5%ae%9e%e6%88%98","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=1198","title":{"rendered":"\u3010Java\u3011Java\u63a5\u53e3\u5168\u65b9\u4f4d\u89e3\u6790\uff1a\u4ece\u57fa\u7840\u5230\u8bbe\u8ba1\u6a21\u5f0f\u5b9e\u6218"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u63a5\u53e3\u662f\u4ec0\u4e48\uff1f\u5b9a\u4e49\u4e0e\u6838\u5fc3\u7279\u6027<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u53e3\u662f Java \u4e2d\u7684\u62bd\u8c61\u7c7b\u578b\uff0c\u901a\u8fc7<code>interface<\/code>\u5173\u952e\u5b57\u5b9a\u4e49\uff0c\u672c\u8d28\u662f \u201c\u884c\u4e3a\u89c4\u8303\u201d \u7684\u96c6\u5408\u3002\u5b83\u7684\u6838\u5fc3\u7279\u6027\u7684\u53ef\u4ee5\u901a\u8fc7\u4ee3\u7801\u76f4\u89c2\u7406\u89e3\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5b9a\u4e49\u4e00\u4e2a\u793a\u4f8b\u63a5\u53e3\npublic interface MyInterface {\n    \/\/ 1. \u5e38\u91cf\uff1a\u9690\u5f0f public static final\uff0c\u5fc5\u987b\u521d\u59cb\u5316\n    String CONSTANT = \"\u56fa\u5b9a\u503c\"; \/\/ \u7b49\u4ef7\u4e8e public static final String CONSTANT = \"\u56fa\u5b9a\u503c\";\n    \n    \/\/ 2. \u62bd\u8c61\u65b9\u6cd5\uff1a\u9690\u5f0f public abstract\uff0c\u65e0\u65b9\u6cd5\u4f53\n    void abstractMethod(); \/\/ \u7b49\u4ef7\u4e8e public abstract void abstractMethod();\n    \n    \/\/ 3. \u9759\u6001\u65b9\u6cd5\uff08Java 8+\uff09\uff1a\u6709\u65b9\u6cd5\u4f53\uff0c\u901a\u8fc7\u63a5\u53e3\u540d\u8c03\u7528\n    static void staticMethod() {\n        System.out.println(\"\u63a5\u53e3\u9759\u6001\u65b9\u6cd5\uff0c\u53ea\u80fd\u901a\u8fc7\u63a5\u53e3\u540d\u8c03\u7528\");\n    }\n    \n    \/\/ 4. \u9ed8\u8ba4\u65b9\u6cd5\uff08Java 8+\uff09\uff1a\u6709\u65b9\u6cd5\u4f53\uff0c\u5b50\u7c7b\u53ef\u9009\u62e9\u6027\u91cd\u5199\n    default void defaultMethod() {\n        System.out.println(\"\u63a5\u53e3\u9ed8\u8ba4\u65b9\u6cd5\uff0c\u5b9e\u73b0\u7c7b\u53ef\u76f4\u63a5\u4f7f\u7528\u6216\u91cd\u5199\");\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u6838\u5fc3\u7ed3\u8bba\uff08\u907f\u5751\u5fc5\u770b\uff09\uff1a<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u2705 \u63a5\u53e3\u53ef\u5305\u542b\u5e38\u91cf\u3001\u62bd\u8c61\u65b9\u6cd5\u3001\u9759\u6001\u65b9\u6cd5\uff08Java8+\uff09\u3001\u9ed8\u8ba4\u65b9\u6cd5\uff08Java8+\uff09<\/li>\n\n\n\n<li>\u2705 \u652f\u6301\u7a7a\u63a5\u53e3\uff08\u65e0\u4efb\u4f55\u6210\u5458\uff09\uff0c\u5178\u578b\u4f8b\u5b50\uff1a<code>java.io.Serializable<\/code>\uff08\u4ec5\u4f5c\u4e3a\u5e8f\u5217\u5316\u6807\u8bb0\uff09<\/li>\n\n\n\n<li>\u274c \u4e0d\u80fd\u7528<code>final<\/code>\u4fee\u9970\u63a5\u53e3\uff08\u63a5\u53e3\u7684\u8bbe\u8ba1\u521d\u8877\u662f\u88ab\u5b9e\u73b0\uff0cfinal \u4f1a\u963b\u6b62\u7ee7\u627f\uff09<\/li>\n\n\n\n<li>\u274c \u62bd\u8c61\u65b9\u6cd5\u4e0d\u80fd\u52a0<code>private\/protected\/final<\/code>\u4fee\u9970\uff08\u8fdd\u80cc \u201c\u516c\u5f00\u89c4\u8303\u201d \u539f\u5219\uff09<\/li>\n\n\n\n<li>\u274c \u63a5\u53e3\u4e0d\u80fd\u76f4\u63a5\u5b9e\u4f8b\u5316\uff1a<code>MyInterface obj = new MyInterface();<\/code> \u4f1a\u7f16\u8bd1\u62a5\u9519<\/li>\n\n\n\n<li>\u274c \u63a5\u53e3\u5e38\u91cf\u503c\u4e0d\u53ef\u4fee\u6539\uff1a<code>CONSTANT = \"\u65b0\u503c\";<\/code> \u4f1a\u7f16\u8bd1\u62a5\u9519<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u63a5\u53e3\u7684 3 \u5927\u6838\u5fc3\u4f5c\u7528\uff0c\u89e3\u51b3\u5b9e\u9645\u5f00\u53d1\u75db\u70b9<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u8d4b\u4e88\u7c7b\u7279\u5b9a\u529f\u80fd<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u4f1a\u81ea\u52a8\u83b7\u5f97\u63a5\u53e3\u5b9a\u4e49\u7684 \u201c\u80fd\u529b\u201d\uff0c\u6bd4\u5982\u5b9e\u73b0<code>Cloneable<\/code>\u83b7\u5f97\u62f7\u8d1d\u80fd\u529b\uff0c\u5b9e\u73b0<code>Comparable<\/code>\u83b7\u5f97\u6bd4\u8f83\u80fd\u529b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5b9e\u73b0\u63a5\u53e3\uff0c\u83b7\u5f97\u5bf9\u5e94\u529f\u80fd\npublic class MyClass implements MyInterface {\n    \/\/ \u5fc5\u987b\u91cd\u5199\u63a5\u53e3\u4e2d\u7684\u62bd\u8c61\u65b9\u6cd5\n    @Override\n    public void abstractMethod() {\n        System.out.println(\"\u91cd\u5199\u63a5\u53e3\u7684\u62bd\u8c61\u65b9\u6cd5\");\n    }\n    \n    \/\/ \u53ef\u9009\uff1a\u91cd\u5199\u9ed8\u8ba4\u65b9\u6cd5\n    @Override\n    public void defaultMethod() {\n        System.out.println(\"\u91cd\u5199\u63a5\u53e3\u7684\u9ed8\u8ba4\u65b9\u6cd5\");\n    }\n}\n\n\/\/ \u6d4b\u8bd5\u7c7b\npublic class TestInterface {\n    public static void main(String&#91;] args) {\n        MyClass obj = new MyClass();\n        obj.abstractMethod(); \/\/ \u8f93\u51fa\uff1a\u91cd\u5199\u63a5\u53e3\u7684\u62bd\u8c61\u65b9\u6cd5\n        obj.defaultMethod();  \/\/ \u8f93\u51fa\uff1a\u91cd\u5199\u63a5\u53e3\u7684\u9ed8\u8ba4\u65b9\u6cd5\n        MyInterface.staticMethod(); \/\/ \u8f93\u51fa\uff1a\u63a5\u53e3\u9759\u6001\u65b9\u6cd5\uff0c\u53ea\u80fd\u901a\u8fc7\u63a5\u53e3\u540d\u8c03\u7528\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u5b9e\u73b0 \u201c\u591a\u91cd\u7ee7\u627f\u201d\uff08\u8865\u5145 Java \u5355\u7ee7\u627f\u9650\u5236\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u7c7b\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u7236\u7c7b\uff0c\u4f46\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\uff0c\u8f7b\u677e\u5b9e\u73b0\u591a\u529f\u80fd\u590d\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5b9a\u4e49\u591a\u4e2a\u63a5\u53e3\ninterface Swimable {\n    void swim();\n}\n\ninterface Runnable {\n    void run();\n}\n\n\/\/ \u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\uff0c\u540c\u65f6\u62e5\u6709\u591a\u79cd\u80fd\u529b\npublic class Duck implements MyInterface, Swimable, Runnable {\n    @Override\n    public void abstractMethod() {\n        System.out.println(\"Duck\u7684\u62bd\u8c61\u65b9\u6cd5\u5b9e\u73b0\");\n    }\n    \n    @Override\n    public void swim() {\n        System.out.println(\"\u9e2d\u5b50\u4f1a\u6e38\u6cf3\");\n    }\n    \n    @Override\n    public void run() {\n        System.out.println(\"\u9e2d\u5b50\u4f1a\u5954\u8dd1\");\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u5b9e\u73b0\u591a\u6001\uff0c\u63d0\u5347\u4ee3\u7801\u7075\u6d3b\u6027<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u591a\u6001\u7684\u6838\u5fc3\u662f \u201c\u540c\u4e00\u884c\u4e3a\uff0c\u4e0d\u540c\u5b9e\u73b0\u201d\uff0c\u6ee1\u8db3 3 \u4e2a\u524d\u63d0\uff1a<strong>\u7ee7\u627f \/ \u5b9e\u73b0\u5173\u7cfb\u3001\u91cd\u5199\u65b9\u6cd5\u3001\u7236\u7c7b \/ \u63a5\u53e3\u5f15\u7528\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5b9a\u4e49\u63a5\u53e3\u5b9e\u73b0\u7c7b\npublic class Bird implements MyInterface {\n    @Override\n    public void abstractMethod() {\n        System.out.println(\"\u5c0f\u9e1f\u7684\u5b9e\u73b0\u903b\u8f91\");\n    }\n}\n\npublic class Cat implements MyInterface {\n    @Override\n    public void abstractMethod() {\n        System.out.println(\"\u5c0f\u732b\u7684\u5b9e\u73b0\u903b\u8f91\");\n    }\n}\n\n\/\/ \u591a\u6001\u6f14\u793a\npublic class PolymorphismTest {\n    public static void main(String&#91;] args) {\n        \/\/ \u63a5\u53e3\u5f15\u7528\u6307\u5411\u4e0d\u540c\u5b9e\u73b0\u7c7b\u5bf9\u8c61\n        MyInterface bird = new Bird();\n        MyInterface cat = new Cat();\n        \n        bird.abstractMethod(); \/\/ \u8f93\u51fa\uff1a\u5c0f\u9e1f\u7684\u5b9e\u73b0\u903b\u8f91\n        cat.abstractMethod();  \/\/ \u8f93\u51fa\uff1a\u5c0f\u732b\u7684\u5b9e\u73b0\u903b\u8f91\n    }\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u63a5\u53e3\u7684 3 \u79cd\u7ecf\u5178\u8bbe\u8ba1\u6a21\u5f0f\uff08\u9644\u5b9e\u6218\u4ee3\u7801\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. \u7b56\u7565\u6a21\u5f0f\uff1a\u5c01\u88c5\u7b97\u6cd5\uff0c\u7075\u6d3b\u5207\u6362<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u601d\u60f3<\/strong>\uff1a\u5c06\u4e00\u7ec4\u7b97\u6cd5\u5c01\u88c5\u5230\u4e0d\u540c\u5b9e\u73b0\u7c7b\u4e2d\uff0c\u8c03\u7528\u8005\u53ef\u6309\u9700\u5207\u6362\uff0c\u4e0d\u5f71\u54cd\u6574\u4f53\u903b\u8f91\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u7b56\u7565\u63a5\u53e3\uff08\u5b9a\u4e49\u7b97\u6cd5\u89c4\u8303\uff09\npublic interface DiscountStrategy {\n    double calculate(double price);\n}\n\n\/\/ \u5177\u4f53\u7b56\u75651\uff1a\u6ee1\u51cf\u4f18\u60e0\npublic class FullReduceStrategy implements DiscountStrategy {\n    @Override\n    public double calculate(double price) {\n        return price &gt;= 200 ? price - 50 : price; \/\/ \u6ee1200\u51cf50\n    }\n}\n\n\/\/ \u5177\u4f53\u7b56\u75652\uff1a\u6298\u6263\u4f18\u60e0\npublic class RateStrategy implements DiscountStrategy {\n    @Override\n    public double calculate(double price) {\n        return price * 0.8; \/\/ 8\u6298\u4f18\u60e0\n    }\n}\n\n\/\/ \u8c03\u7528\u8005\uff08\u65e0\u9700\u5173\u5fc3\u5177\u4f53\u7b97\u6cd5\uff09\npublic class PriceCalculator {\n    private DiscountStrategy strategy;\n    \n    public PriceCalculator(DiscountStrategy strategy) {\n        this.strategy = strategy;\n    }\n    \n    public double getFinalPrice(double price) {\n        return strategy.calculate(price);\n    }\n    \n    \/\/ \u5207\u6362\u7b56\u7565\n    public void setStrategy(DiscountStrategy strategy) {\n        this.strategy = strategy;\n    }\n}\n\n\/\/ \u6d4b\u8bd5\npublic class StrategyTest {\n    public static void main(String&#91;] args) {\n        PriceCalculator calculator = new PriceCalculator(new FullReduceStrategy());\n        System.out.println(\"\u6ee1\u51cf\u540e\u4ef7\u683c\uff1a\" + calculator.getFinalPrice(250)); \/\/ \u8f93\u51fa\uff1a200.0\n        \n        calculator.setStrategy(new RateStrategy());\n        System.out.println(\"\u6298\u6263\u540e\u4ef7\u683c\uff1a\" + calculator.getFinalPrice(250)); \/\/ \u8f93\u51fa\uff1a200.0\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. \u9002\u914d\u5668\u6a21\u5f0f\uff1a\u9002\u914d\u65e7\u63a5\u53e3\uff0c\u89e3\u51b3\u517c\u5bb9\u6027\u95ee\u9898<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u601d\u60f3<\/strong>\uff1a\u5c06\u539f\u6709\u63a5\u53e3\u8f6c\u6362\u4e3a\u8c03\u7528\u8005\u9700\u8981\u7684\u63a5\u53e3\uff0c\u7c7b\u4f3c\u751f\u6d3b\u4e2d\u7684 HDMI \u8f6c\u63a5\u5934\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u65e7\u63a5\u53e3\uff08\u9700\u8981\u9002\u914d\u7684\u63a5\u53e3\uff09\npublic interface OldPayment {\n    void payByCash(double money);\n}\n\n\/\/ \u65b0\u63a5\u53e3\uff08\u76ee\u6807\u63a5\u53e3\uff09\npublic interface NewPayment {\n    void pay(double money, String type);\n}\n\n\/\/ \u9002\u914d\u5668\u7c7b\uff08\u8fde\u63a5\u65e7\u63a5\u53e3\u548c\u65b0\u63a5\u53e3\uff09\npublic class PaymentAdapter implements NewPayment {\n    private OldPayment oldPayment;\n    \n    public PaymentAdapter(OldPayment oldPayment) {\n        this.oldPayment = oldPayment;\n    }\n    \n    @Override\n    public void pay(double money, String type) {\n        if (\"CASH\".equals(type)) {\n            oldPayment.payByCash(money); \/\/ \u9002\u914d\u65e7\u63a5\u53e3\u65b9\u6cd5\n        } else {\n            System.out.println(\"\u652f\u6301\u5176\u4ed6\u652f\u4ed8\u65b9\u5f0f\uff1a\" + type);\n        }\n    }\n}\n\n\/\/ \u6d4b\u8bd5\npublic class AdapterTest {\n    public static void main(String&#91;] args) {\n        \/\/ \u65e7\u63a5\u53e3\u5b9e\u73b0\n        OldPayment cashPayment = money -&gt; System.out.println(\"\u73b0\u91d1\u652f\u4ed8\uff1a\" + money + \"\u5143\");\n        \/\/ \u9002\u914d\u4e3a\u65b0\u63a5\u53e3\n        NewPayment newPayment = new PaymentAdapter(cashPayment);\n        \n        newPayment.pay(100, \"CASH\"); \/\/ \u8f93\u51fa\uff1a\u73b0\u91d1\u652f\u4ed8\uff1a100.0\u5143\n        newPayment.pay(200, \"WECHAT\"); \/\/ \u8f93\u51fa\uff1a\u652f\u6301\u5176\u4ed6\u652f\u4ed8\u65b9\u5f0f\uff1aWECHAT\n    }\n}\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3. \u5de5\u5382\u6a21\u5f0f\uff1a\u7edf\u4e00\u521b\u5efa\u5bf9\u8c61\uff0c\u89e3\u8026\u521b\u5efa\u4e0e\u4f7f\u7528<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u601d\u60f3<\/strong>\uff1a\u901a\u8fc7\u5de5\u5382\u7c7b\u7edf\u4e00\u521b\u5efa\u63a5\u53e3\u5b9e\u73b0\u7c7b\u5bf9\u8c61\uff0c\u8c03\u7528\u8005\u65e0\u9700\u5173\u6ce8\u521b\u5efa\u7ec6\u8282\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5de5\u5382\u7c7b\uff08\u521b\u5efa\u63a5\u53e3\u5b9e\u4f8b\uff09\npublic class InterfaceFactory {\n    public static MyInterface createInstance(String type) {\n        switch (type) {\n            case \"BIRD\":\n                return new Bird();\n            case \"CAT\":\n                return new Cat();\n            case \"DUCK\":\n                return new Duck();\n            default:\n                throw new IllegalArgumentException(\"\u672a\u77e5\u7c7b\u578b\uff1a\" + type);\n        }\n    }\n}\n\n\/\/ \u6d4b\u8bd5\npublic class FactoryTest {\n    public static void main(String&#91;] args) {\n        MyInterface bird = InterfaceFactory.createInstance(\"BIRD\");\n        MyInterface cat = InterfaceFactory.createInstance(\"CAT\");\n        \n        bird.abstractMethod(); \/\/ \u8f93\u51fa\uff1a\u5c0f\u9e1f\u7684\u5b9e\u73b0\u903b\u8f91\n        cat.abstractMethod();  \/\/ \u8f93\u51fa\uff1a\u5c0f\u732b\u7684\u5b9e\u73b0\u903b\u8f91\n    }\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u62bd\u8c61\u7c7b vs \u63a5\u53e3\uff1a\u5173\u952e\u533a\u522b\uff08\u8868\u683c + \u4ee3\u7801\u5bf9\u6bd4\uff09<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">\u5bf9\u6bd4\u7ef4\u5ea6<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u62bd\u8c61\u7c7b\uff08abstract class\uff09<\/th><th class=\"has-text-align-left\" data-align=\"left\">\u63a5\u53e3\uff08interface\uff09<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">\u6210\u5458\u53d8\u91cf<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u652f\u6301\u4efb\u610f\u7c7b\u578b\u53d8\u91cf<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u4ec5\u652f\u6301 public static final \u5e38\u91cf<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u65b9\u6cd5\u7c7b\u578b<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u53ef\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\u3001\u666e\u901a\u65b9\u6cd5\u3001\u9759\u6001\u65b9\u6cd5<\/td><td class=\"has-text-align-left\" data-align=\"left\">Java8+ \u652f\u6301\u62bd\u8c61\u65b9\u6cd5\u3001\u9ed8\u8ba4\u65b9\u6cd5\u3001\u9759\u6001\u65b9\u6cd5<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u6784\u9020\u65b9\u6cd5<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u6709\u6784\u9020\u65b9\u6cd5\uff08\u4f9b\u5b50\u7c7b\u8c03\u7528\uff09<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u65e0\u6784\u9020\u65b9\u6cd5<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u7ee7\u627f \/ \u5b9e\u73b0<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u5b50\u7c7b\u5355\u7ee7\u627f\uff08extends\uff09<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u7c7b\u53ef\u591a\u5b9e\u73b0\uff08implements\uff09<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u8bbe\u8ba1\u7406\u5ff5<\/td><td class=\"has-text-align-left\" data-align=\"left\">is-a \u5173\u7cfb\uff08\u5982\uff1aDog is a Animal\uff09<\/td><td class=\"has-text-align-left\" data-align=\"left\">has-a \u80fd\u529b\uff08\u5982\uff1aBird has a Flyable \u80fd\u529b\uff09<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">\u9759\u6001\u4ee3\u7801\u5757<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u652f\u6301<\/td><td class=\"has-text-align-left\" data-align=\"left\">\u4e0d\u652f\u6301<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u4ee3\u7801\u5bf9\u6bd4\u793a\u4f8b\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u62bd\u8c61\u7c7b\uff08is-a \u5173\u7cfb\uff09\npublic abstract class Animal {\n    \/\/ \u666e\u901a\u6210\u5458\u53d8\u91cf\n    protected String name;\n    \n    \/\/ \u6784\u9020\u65b9\u6cd5\n    public Animal(String name) {\n        this.name = name;\n    }\n    \n    \/\/ \u666e\u901a\u65b9\u6cd5\uff08\u6709\u5b9e\u73b0\uff09\n    public void eat() {\n        System.out.println(name + \"\u5728\u8fdb\u98df\");\n    }\n    \n    \/\/ \u62bd\u8c61\u65b9\u6cd5\uff08\u65e0\u5b9e\u73b0\uff09\n    public abstract void move();\n}\n\n\/\/ \u63a5\u53e3\uff08has-a \u80fd\u529b\uff09\npublic interface Flyable {\n    String FLY_MODE = \"WING\"; \/\/ \u5e38\u91cf\n    \n    void fly(); \/\/ \u62bd\u8c61\u65b9\u6cd5\n    \n    default void prepare() {\n        System.out.println(\"\u98de\u884c\u524d\u51c6\u5907\");\n    }\n}\n\n\/\/ \u5b50\u7c7b\uff1a\u7ee7\u627f\u62bd\u8c61\u7c7b + \u5b9e\u73b0\u63a5\u53e3\npublic class Eagle extends Animal implements Flyable {\n    public Eagle(String name) {\n        super(name); \/\/ \u8c03\u7528\u62bd\u8c61\u7c7b\u6784\u9020\u65b9\u6cd5\n    }\n    \n    @Override\n    public void move() {\n        fly(); \/\/ \u590d\u7528\u63a5\u53e3\u65b9\u6cd5\n    }\n    \n    @Override\n    public void fly() {\n        System.out.println(name + \"\u5c55\u7fc5\u9ad8\u98de\");\n    }\n}\n\n\/\/ \u6d4b\u8bd5\npublic class AbstractVsInterfaceTest {\n    public static void main(String&#91;] args) {\n        Eagle eagle = new Eagle(\"\u767d\u5934\u6d77\u96d5\");\n        eagle.eat();    \/\/ \u8f93\u51fa\uff1a\u767d\u5934\u6d77\u96d5\u5728\u8fdb\u98df\n        eagle.move();   \/\/ \u8f93\u51fa\uff1a\u767d\u5934\u6d77\u96d5\u5c55\u7fc5\u9ad8\u98de\n        eagle.prepare();\/\/ \u8f93\u51fa\uff1a\u98de\u884c\u524d\u51c6\u5907\n    }\n}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u63a5\u53e3\u662f\u5b9e\u73b0\u89e3\u8026\u3001\u591a\u6001\u548c\u529f\u80fd\u6269\u5c55\u7684\u6838\u5fc3\u5de5\u5177\uff0c\u6838\u5fc3\u8981\u70b9\u603b\u7ed3\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u63a5\u53e3\u662f \u201c\u884c\u4e3a\u89c4\u8303\u201d\uff0c\u5b9a\u4e49 what to do\uff0c\u4e0d\u5173\u5fc3 how to do<\/li>\n\n\n\n<li>\u6838\u5fc3\u4ef7\u503c\uff1a\u8d4b\u4e88\u7c7b\u7279\u5b9a\u80fd\u529b\u3001\u7a81\u7834\u5355\u7ee7\u627f\u9650\u5236\u3001\u5b9e\u73b0\u591a\u6001<\/li>\n\n\n\n<li>\u7ecf\u5178\u5e94\u7528\uff1a\u7b56\u7565\u6a21\u5f0f\uff08\u7b97\u6cd5\u5207\u6362\uff09\u3001\u9002\u914d\u5668\u6a21\u5f0f\uff08\u517c\u5bb9\u6027\uff09\u3001\u5de5\u5382\u6a21\u5f0f\uff08\u5bf9\u8c61\u521b\u5efa\u89e3\u8026\uff09<\/li>\n\n\n\n<li>\u4e0e\u62bd\u8c61\u7c7b\u9009\u62e9\uff1ais-a \u5173\u7cfb\u7528\u62bd\u8c61\u7c7b\uff0chas-a \u80fd\u529b\u7528\u63a5\u53e3<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5927\u5bb6\u5728\u63a5\u53e3\u4f7f\u7528\u4e2d\u9047\u5230\u5177\u4f53\u95ee\u9898\uff08\u6bd4\u5982\u9ed8\u8ba4\u65b9\u6cd5\u51b2\u7a81\u3001\u8bbe\u8ba1\u6a21\u5f0f\u843d\u5730\u96be\u70b9\uff09\uff0c\u6216\u8005\u60f3\u4e86\u89e3\u66f4\u591a\u5b9e\u6218\u573a\u666f\uff0c\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\u4ea4\u6d41\uff5e \u6280\u672f\u4e4b\u8def\uff0c\u4e00\u8d77\u6c89\u6dc0\uff0c\u5171\u540c\u8fdb\u6b65\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u63a5\u53e3\u662f\u4ec0\u4e48\uff1f\u5b9a\u4e49\u4e0e\u6838\u5fc3\u7279\u6027 \u63a5\u53e3\u662f Java \u4e2d\u7684\u62bd\u8c61\u7c7b\u578b\uff0c\u901a\u8fc7interface\u5173\u952e\u5b57\u5b9a\u4e49\uff0c\u672c\u8d28\u662f \u201c\u884c<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=1198\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":168,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[15],"class_list":["post-1198","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java"],"_links":{"self":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1198","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1198"}],"version-history":[{"count":2,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1198\/revisions"}],"predecessor-version":[{"id":1200,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/1198\/revisions\/1200"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/168"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}