{"id":272,"date":"2026-07-19T09:36:18","date_gmt":"2026-07-19T01:36:18","guid":{"rendered":"http:\/\/ssjava.xyz\/index.php\/2026\/07\/19\/%e6%8e%a5%e5%8f%a3%e5%9f%ba%e7%a1%80%ef%bc%9a%e8%af%ad%e6%b3%95%e3%80%81%e7%89%b9%e6%80%a7%e4%b8%8e%e6%8a%bd%e8%b1%a1%e7%b1%bb%e5%af%b9%e6%af%94\/"},"modified":"2026-07-19T11:31:34","modified_gmt":"2026-07-19T03:31:34","slug":"20-%e6%8e%a5%e5%8f%a3%e5%9f%ba%e7%a1%80%ef%bc%9a%e8%af%ad%e6%b3%95%e3%80%81%e7%89%b9%e6%80%a7%e4%b8%8e%e6%8a%bd%e8%b1%a1%e7%b1%bb%e5%af%b9%e6%af%94","status":"publish","type":"post","link":"https:\/\/ssjava.xyz\/index.php\/2026\/07\/19\/20-%e6%8e%a5%e5%8f%a3%e5%9f%ba%e7%a1%80%ef%bc%9a%e8%af%ad%e6%b3%95%e3%80%81%e7%89%b9%e6%80%a7%e4%b8%8e%e6%8a%bd%e8%b1%a1%e7%b1%bb%e5%af%b9%e6%af%94\/","title":{"rendered":"20. \u63a5\u53e3\u57fa\u7840\uff1a\u8bed\u6cd5\u3001\u7279\u6027\u4e0e\u62bd\u8c61\u7c7b\u5bf9\u6bd4"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u62bd\u8c61\u7c7b\u8bb2\u5b8c\u4e86\u3002\u4f60\u77e5\u9053\u7236\u7c7b\u53ef\u4ee5\u53ea\u58f0\u660e\u65b9\u6cd5\u7b7e\u540d\uff0c\u4e0d\u5199\u5b9e\u73b0\u4f53\uff0c\u5f3a\u5236\u5b50\u7c7b\u53bb\u5b9e\u73b0\u3002\u8fd9\u662f\u4e00\u79cd \u300c\u6a21\u677f\u300d \u7684\u601d\u60f3\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u62bd\u8c61\u7c7b\u6709\u4e2a\u95ee\u9898\uff1a\u4e00\u4e2a\u7c7b <strong>\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u7236\u7c7b<\/strong>\u3002\u5982\u679c\u67d0\u4e2a\u7c7b\u60f3\u8981\u62e5\u6709\u591a\u79cd\u80fd\u529b\u2014\u2014\u6bd4\u5982\u4e00\u4e2a\u6c7d\u8f66\u7c7b\u60f3\u540c\u65f6\u5177\u5907\u300c\u53ef\u9a7e\u9a76\u300d\u548c\u300c\u53ef\u5145\u7535\u300d\u7684\u7279\u5f81\u2014\u2014\u5355\u7ee7\u627f\u7684\u5c40\u9650\u6027\u5c31\u5361\u4f4f\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u7684\u89e3\u51b3\u65b9\u6848\u5c31\u662f <strong>\u63a5\u53e3<\/strong>\uff08Interface\uff09\u3002\u63a5\u53e3\u53ea\u5b9a\u4e49\u4e86\u300c\u80fd\u505a\u4ec0\u4e48\u300d\u7684\u5951\u7ea6\uff0c\u4e0d\u5173\u5fc3\u300c\u600e\u4e48\u505a\u300d\u3002\u800c\u4e14\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\uff0c\u5f25\u8865\u4e86\u5355\u7ee7\u627f\u7684\u4e0d\u8db3\u3002<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u62bd\u8c61\u7c7b\u662f\u300c\u662f\u4ec0\u4e48\u300d\u7684\u5173\u7cfb\uff08is-a\uff09\uff0c\u63a5\u53e3\u662f\u300c\u80fd\u505a\u4ec0\u4e48\u300d\u7684\u5173\u7cfb\uff08can-do\uff09\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u63a5\u53e3\u7684\u8bed\u6cd5<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1.1 \u5b9a\u4e49\u548c\u5b9e\u73b0\u4e00\u4e2a\u63a5\u53e3<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u5b9a\u4e49\u63a5\u53e3\u2014\u2014\u7528 interface \u5173\u952e\u5b57\uff0c\u800c\u4e0d\u662f class\npublic interface Flyable {\n    \/\/ \u62bd\u8c61\u65b9\u6cd5\uff08\u4e0d\u5199 abstract \u4e5f\u9ed8\u8ba4\u662f\uff09\n    void fly();\n}\n\n\/\/ \u5b9e\u73b0\u63a5\u53e3\u2014\u2014\u7528 implements \u5173\u952e\u5b57\nclass Bird implements Flyable {\n    @Override\n    public void fly() {\n        System.out.println(\"\u9e1f\u513f\u6247\u52a8\u7fc5\u8180\u98de\u884c\");\n    }\n}\n\nclass Airplane implements Flyable {\n    @Override\n    public void fly() {\n        System.out.println(\"\u98de\u673a\u5f15\u64ce\u63a8\u8fdb\u98de\u884c\");\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">1.2 \u63a5\u53e3\u4e0e\u591a\u6001<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u53e3\u5929\u7136\u652f\u6301\u591a\u6001\u2014\u2014\u4f60\u53ef\u4ee5\u58f0\u660e\u4e00\u4e2a\u63a5\u53e3\u7c7b\u578b\u7684\u5f15\u7528\uff0c\u6307\u5411\u4efb\u4f55\u5b9e\u73b0\u4e86\u8be5\u63a5\u53e3\u7684\u7c7b\u5bf9\u8c61\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Flyable f1 = new Bird();\nFlyable f2 = new Airplane();\n\nf1.fly();   \/\/ \u9e1f\u513f\u6247\u52a8\u7fc5\u8180\u98de\u884c\u2014\u2014\u52a8\u6001\u7ed1\u5b9a\nf2.fly();   \/\/ \u98de\u673a\u5f15\u64ce\u63a8\u8fdb\u98de\u884c\u2014\u2014\u52a8\u6001\u7ed1\u5b9a\n\n\/\/ \u591a\u6001\u6570\u7ec4\nFlyable[] sky = { new Bird(), new Airplane(), new Drone() };\nfor (Flyable f : sky) {\n    f.fly();\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u6ca1\u6709\u53d1\u73b0\u548c\u62bd\u8c61\u7c7b\u5f88\u50cf\uff1f\u662f\u7684\uff0c\u63a5\u53e3\u7684\u5f15\u7528\u548c\u62bd\u8c61\u7c7b\u7684\u5f15\u7528\u4e00\u6837\uff0c\u90fd\u662f\u9760\u591a\u6001\u5728\u8fd0\u884c\u671f\u51b3\u5b9a\u8c03\u7528\u54ea\u4e2a\u5b9e\u73b0\u7c7b\u7684\u65b9\u6cd5\u3002\u533a\u522b\u5728\u4e8e\u2014\u2014\u63a5\u53e3\u66f4\u300c\u7eaf\u7cb9\u300d\uff0c\u53ea\u5b9a\u4e49\u884c\u4e3a\u5951\u7ea6\uff0c\u4e0d\u5305\u542b\u4efb\u4f55\u72b6\u6001\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u63a5\u53e3\u7684\u7279\u6027\u4e0e\u89c4\u5219<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">2.1 \u63a5\u53e3\u4e2d\u7684\u6210\u5458<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u6210\u5458\u7c7b\u578b<\/th><th>\u9ed8\u8ba4\u4fee\u9970\u7b26<\/th><th>\u5907\u6ce8<\/th><\/tr><\/thead><tbody><tr><td>\u62bd\u8c61\u65b9\u6cd5<\/td><td><code>public abstract<\/code><\/td><td>\u63a5\u53e3\u7684\u4e3b\u8981\u6210\u5458\uff0c\u5b9e\u73b0\u7c7b\u5fc5\u987b\u91cd\u5199<\/td><\/tr><tr><td>\u5e38\u91cf<\/td><td><code>public static final<\/code><\/td><td>\u63a5\u53e3\u4e2d\u7684\u53d8\u91cf\u9ed8\u8ba4\u90fd\u662f\u5e38\u91cf<\/td><\/tr><tr><td>\u9ed8\u8ba4\u65b9\u6cd5\uff08Java 8+\uff09<\/td><td><code>public default<\/code><\/td><td>\u63a5\u53e3\u53ef\u4ee5\u6709\u9ed8\u8ba4\u5b9e\u73b0\uff0c\u5b50\u7c7b\u53ef\u9009\u62e9\u662f\u5426\u91cd\u5199<\/td><\/tr><tr><td>\u9759\u6001\u65b9\u6cd5\uff08Java 8+\uff09<\/td><td><code>public static<\/code><\/td><td>\u901a\u8fc7\u63a5\u53e3\u540d\u76f4\u63a5\u8c03\u7528<\/td><\/tr><tr><td>\u79c1\u6709\u65b9\u6cd5\uff08Java 9+\uff09<\/td><td><code>private<\/code><\/td><td>\u8f85\u52a9\u9ed8\u8ba4\u65b9\u6cd5\/\u9759\u6001\u65b9\u6cd5\uff0c\u5bf9\u5916\u4e0d\u53ef\u89c1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<pre class=\"wp-block-code\"><code>public interface AdvancedInterface {\n    \/\/ 1. \u62bd\u8c61\u65b9\u6cd5\uff08\u6700\u5e38\u89c1\uff09\n    void doSomething();\n\n    \/\/ 2. \u5e38\u91cf\uff08\u63a5\u53e3\u4e2d\u7684\u53d8\u91cf\u90fd\u662f public static final\uff09\n    int MAX_COUNT = 100;\n\n    \/\/ 3. \u9ed8\u8ba4\u65b9\u6cd5\u2014\u2014\u6709\u65b9\u6cd5\u4f53\uff0c\u5b50\u7c7b\u53ef\u9009\u62e9\u662f\u5426\u91cd\u5199\n    default void doDefault() {\n        System.out.println(\"\u9ed8\u8ba4\u5b9e\u73b0\uff0c\u5b50\u7c7b\u53ef\u4ee5\u4e0d\u91cd\u5199\");\n        helperMethod();   \/\/ \u8c03\u79c1\u6709\u65b9\u6cd5\n    }\n\n    \/\/ 4. \u9759\u6001\u65b9\u6cd5\u2014\u2014\u901a\u8fc7\u63a5\u53e3\u540d\u8c03\u7528\n    static void doStatic() {\n        System.out.println(\"\u63a5\u53e3\u81ea\u5df1\u7684\u9759\u6001\u65b9\u6cd5\");\n    }\n\n    \/\/ 5. \u79c1\u6709\u65b9\u6cd5\uff08JDK 9+\uff09\u2014\u2014\u7ed9\u9ed8\u8ba4\u65b9\u6cd5\u6216\u9759\u6001\u65b9\u6cd5\u5185\u90e8\u590d\u7528\n    private void helperMethod() {\n        System.out.println(\"\u79c1\u6709\u8f85\u52a9\u65b9\u6cd5\uff0c\u5bf9\u5916\u4e0d\u53ef\u89c1\");\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2.2 \u63a5\u53e3\u4e0d\u80fd\u5305\u542b\u7684\u4e1c\u897f<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u274c \u5b9e\u4f8b\u53d8\u91cf\uff08\u63a5\u53e3\u6ca1\u6709\u72b6\u6001\uff0c\u4e0d\u80fd\u6709\u975e\u9759\u6001\u5b57\u6bb5\uff09<\/li>\n\n\n<li>\u274c \u6784\u9020\u5668\uff08\u63a5\u53e3\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316\uff0c\u5f53\u7136\u4e5f\u6ca1\u6709\u6784\u9020\u5668\uff09<\/li>\n\n\n<li>\u274c \u5b9e\u4f8b\u521d\u59cb\u5316\u5757\uff08\u6ca1\u6709\u5b9e\u4f8b\uff0c\u521d\u59cb\u5316\u5757\u81ea\u7136\u6ca1\u610f\u4e49\uff09<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2.3 \u63a5\u53e3\u7684\u591a\u7ee7\u627f<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u53e3\u4e4b\u95f4\u53ef\u4ee5 <strong>\u591a\u7ee7\u627f<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>interface A {\n    void methodA();\n}\ninterface B {\n    void methodB();\n}\n\/\/ \u63a5\u53e3\u591a\u7ee7\u627f\ninterface C extends A, B {\n    void methodC();\n}\n\n\/\/ \u5b9e\u73b0\u7c7b\u2014\u2014\u5fc5\u987b\u5b9e\u73b0\u6240\u6709\u63a5\u53e3\u4e2d\u7684\u6240\u6709\u62bd\u8c61\u65b9\u6cd5\nclass MyClass implements C {\n    @Override\n    public void methodA() { \/* ... *\/ }\n    @Override\n    public void methodB() { \/* ... *\/ }\n    @Override\n    public void methodC() { \/* ... *\/ }\n}<\/code><\/pre>\n\n\n\n<p>\u8fd9\u662f\u63a5\u53e3\u548c\u62bd\u8c61\u7c7b\u7684\u91cd\u8981\u533a\u522b\u4e4b\u4e00\u2014\u2014<strong>\u62bd\u8c61\u7c7b\u53ea\u80fd\u5355\u7ee7\u627f<\/strong>\uff0c<strong>\u63a5\u53e3\u53ef\u4ee5\u591a\u7ee7\u627f<\/strong>\u3002\u4f46\u56e0\u4e3a\u63a5\u53e3\u6ca1\u6709\u72b6\u6001\uff08\u6ca1\u6709\u5b9e\u4f8b\u53d8\u91cf\uff09\uff0c\u591a\u7ee7\u627f\u4e0d\u4f1a\u5f15\u5165\u300c\u83f1\u5f62\u95ee\u9898\u300d\u4e2d\u7684\u72b6\u6001\u51b2\u7a81\u3002\u65b9\u6cd5\u7b7e\u540d\u4e0a\u7684\u51b2\u7a81\u53ef\u4ee5\u901a\u8fc7\u91cd\u5199\u6216 super \u8bed\u6cd5\u89e3\u51b3\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u63a5\u53e3 vs \u62bd\u8c61\u7c7b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u9762\u8bd5\u5fc5\u95ee\u9898\uff0c\u540c\u65f6\u4e5f\u662f\u5b9e\u9645\u5f00\u53d1\u4e2d\u6700\u5bb9\u6613\u7ea0\u7ed3\u7684\u70b9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u5bf9\u6bd4\u9879<\/th><th>\u62bd\u8c61\u7c7b<\/th><th>\u63a5\u53e3<\/th><\/tr><\/thead><tbody><tr><td>\u5173\u952e\u5b57<\/td><td><code>abstract class<\/code><\/td><td><code>interface<\/code><\/td><\/tr><tr><td>\u5173\u7cfb<\/td><td>is-a\uff08\u662f\u4ec0\u4e48\uff09<\/td><td>can-do\uff08\u80fd\u505a\u4ec0\u4e48\uff09<\/td><\/tr><tr><td>\u591a\u7ee7\u627f<\/td><td>\u53ea\u80fd\u5355\u7ee7\u627f<\/td><td>\u53ef\u4ee5\u591a\u5b9e\u73b0\u3001\u591a\u7ee7\u627f<\/td><\/tr><tr><td>\u6784\u9020\u5668<\/td><td>\u6709<\/td><td>\u6ca1\u6709<\/td><\/tr><tr><td>\u5b9e\u4f8b\u53d8\u91cf<\/td><td>\u53ef\u4ee5\u6709<\/td><td>\u4e0d\u80fd\u6709\uff08\u53ea\u6709\u5e38\u91cf\uff09<\/td><\/tr><tr><td>\u65b9\u6cd5\u5b9e\u73b0<\/td><td>\u53ef\u4ee5\u6709\u666e\u901a\u65b9\u6cd5+\u62bd\u8c61\u65b9\u6cd5<\/td><td>\u5168\u62bd\u8c61\u65b9\u6cd5\uff08Java 8+\u53ef\u4ee5\u6709\u9ed8\u8ba4\/\u9759\u6001\u65b9\u6cd5\uff09<\/td><\/tr><tr><td>\u8bbf\u95ee\u4fee\u9970\u7b26<\/td><td>\u53ef\u4ee5\u7528\u4efb\u610f\u8bbf\u95ee\u4fee\u9970\u7b26<\/td><td>\u65b9\u6cd5\u9ed8\u8ba4 public<\/td><\/tr><tr><td>\u4f7f\u7528\u573a\u666f<\/td><td>\u7c7b\u65cf\u6709\u5171\u540c\u57fa\u7c7b\uff0c\u5171\u4eab\u72b6\u6001\u548c\u90e8\u5206\u5b9e\u73b0<\/td><td>\u5b9a\u4e49\u884c\u4e3a\u5951\u7ea6\uff0c\u4e0d\u5173\u5fc3\u5177\u4f53\u5c42\u7ea7<\/td><\/tr><\/tbody><\/table>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 \u9009\u62e9\u5224\u65ad\u5668<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ea0\u7ed3\u7684\u65f6\u5019\uff0c\u95ee\u81ea\u5df1\u4e09\u4e2a\u95ee\u9898\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u8fd9\u4e24\u4e2a\u7c7b\u4e4b\u95f4\u6709\u300c\u662f\u4ec0\u4e48\u300d\u7684\u5173\u7cfb\u5417\uff1f<\/strong>\uff08Cat is-a Animal \u2192 \u7528\u62bd\u8c61\u7c7b\uff09<\/li>\n\n\n<li><strong>\u591a\u4e2a\u4e0d\u76f8\u5173\u7684\u7c7b\u9700\u8981\u5171\u7528\u540c\u4e00\u5957\u884c\u4e3a\u5417\uff1f<\/strong>\uff08Bird \u548c Airplane \u90fd\u80fd fly \u2192 \u7528\u63a5\u53e3\uff09<\/li>\n\n\n<li><strong>\u9700\u8981\u5171\u4eab\u72b6\u6001\uff08\u5b57\u6bb5\uff09\u5417\uff1f<\/strong>\uff08\u9700\u8981 \u2192 \u7528\u62bd\u8c61\u7c7b\uff1b\u4e0d\u9700\u8981 \u2192 \u7528\u63a5\u53e3\uff09<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u884c\u4e1a\u7684\u5171\u8bc6\u662f\uff1a<strong>\u4f18\u5148\u4f7f\u7528\u63a5\u53e3\uff0c\u800c\u4e0d\u662f\u62bd\u8c61\u7c7b<\/strong>\u3002\u63a5\u53e3\u7684\u8026\u5408\u5ea6\u66f4\u4f4e\uff0c\u66f4\u7075\u6d3b\uff0c\u4e5f\u66f4\u5bb9\u6613\u6d4b\u8bd5\u548c mock\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001default \u65b9\u6cd5\u7684\u5f15\u5165\u52a8\u673a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Java 8 \u4e4b\u524d\uff0c\u63a5\u53e3\u91cc\u53ea\u80fd\u6709\u62bd\u8c61\u65b9\u6cd5\u3002\u8fd9\u610f\u5473\u7740\u5982\u679c\u7ed9\u4e00\u4e2a\u63a5\u53e3\u65b0\u589e\u4e00\u4e2a\u65b9\u6cd5\uff0c\u6240\u6709\u5b9e\u73b0\u7c7b\u90fd\u5f97\u8ddf\u7740\u6539\u2014\u2014\u5373\u4fbf\u5927\u591a\u6570\u5b9e\u73b0\u7c7b\u7684\u5b9e\u73b0\u903b\u8f91\u90fd\u4e00\u6837\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Java 8 \u5f15\u5165 <code>default<\/code> \u65b9\u6cd5\u7684\u521d\u8877\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e3a\u4e86\u7ed9 <code>Collection<\/code> \u63a5\u53e3\u65b0\u589e <code>stream()<\/code>\u3001<code>forEach()<\/code> \u7b49\u65b9\u6cd5\uff0c\u4f46\u53c8\u4e0d\u5f3a\u5236\u6240\u6709\u5b9e\u73b0\u7c7b\u91cd\u5199<\/li>\n\n\n<li>\u5982\u679c\u4e0d\u7528 default \u65b9\u6cd5\uff0cJava 8 \u8981\u52a0\u6d41\u5f0f\u64cd\u4f5c\uff0c\u5c31\u5f97\u8ba9\u6240\u6709\u96c6\u5408\u7c7b\uff08ArrayList\u3001HashSet \u7b49\uff09\u90fd\u6539\u4ee3\u7801\u2014\u2014\u90a3\u573a\u9762\u592a\u7f8e\u4e0d\u6562\u770b<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Collection \u63a5\u53e3\u4e2d Java 8 \u65b0\u589e\u7684\u9ed8\u8ba4\u65b9\u6cd5\npublic interface Collection&lt;E&gt; {\n    \/\/ \u8fd9\u4e2a\u65b9\u6cd5\u6240\u6709\u5b9e\u73b0\u7c7b\u81ea\u52a8\u5c31\u6709\u4e86\uff0c\u4e0d\u7528\u9010\u4e2a\u91cd\u5199\n    default void forEach(Consumer&lt;? super E&gt; action) {\n        Objects.requireNonNull(action);\n        for (E e : this) {\n            action.accept(e);\n        }\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u770b\uff0c<code>ArrayList<\/code>\u3001<code>LinkedList<\/code>\u3001<code>HashSet<\/code>\u2026\u2026\u6240\u6709\u8fd9\u4e9b\u96c6\u5408\u7c7b\uff0c\u4e00\u884c\u4ee3\u7801\u6ca1\u6539\u5c31\u62e5\u6709\u4e86 <code>forEach()<\/code> \u65b9\u6cd5\u3002\u8fd9\u5c31\u662f <code>default<\/code> \u65b9\u6cd5\u7684\u5a01\u529b\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u603b\u7ed3<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u63a5\u53e3\u662f\u300c\u5951\u7ea6\u300d<\/strong>\uff1a\u5b9a\u4e49\u884c\u4e3a\u89c4\u8303\uff0c\u4e0d\u6d89\u53ca\u5177\u4f53\u5b9e\u73b0\u548c\u72b6\u6001<\/li>\n\n\n<li><strong>\u63a5\u53e3\u652f\u6301\u591a\u5b9e\u73b0<\/strong>\uff1a\u5f25\u8865 Java \u5355\u7ee7\u627f\u7684\u4e0d\u8db3<\/li>\n\n\n<li><strong>\u63a5\u53e3\u7684\u6210\u5458<\/strong>\uff1a\u62bd\u8c61\u65b9\u6cd5\uff08\u4e3b\u6d41\uff09+ \u5e38\u91cf + default \u65b9\u6cd5 + \u9759\u6001\u65b9\u6cd5 + \u79c1\u6709\u65b9\u6cd5<\/li>\n\n\n<li><strong>\u63a5\u53e3 vs \u62bd\u8c61\u7c7b<\/strong>\uff1ais-a \u7528\u62bd\u8c61\u7c7b\uff0ccan-do \u7528\u63a5\u53e3\uff1b\u4f18\u5148\u63a5\u53e3<\/li>\n\n\n<li><strong>default \u65b9\u6cd5<\/strong>\uff1a\u8ba9\u63a5\u53e3\u53ef\u4ee5\u6269\u5c55\u800c\u4e0d\u7834\u574f\u73b0\u6709\u5b9e\u73b0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e00\u7bc7\u662f\u63a5\u53e3\u7684\u57fa\u7840\u3002\u4e0b\u4e00\u7bc7\u6211\u4eec\u6765\u6df1\u5165\u63a5\u53e3\u5728\u5de5\u7a0b\u4e2d\u7684\u9ad8\u7ea7\u7528\u6cd5\u2014\u2014\u6807\u8bb0\u63a5\u53e3\u3001\u51fd\u6570\u5f0f\u63a5\u53e3\uff08lambda \u7684\u524d\u7f6e\u77e5\u8bc6\uff09\u3001\u63a5\u53e3\u9694\u79bb\u539f\u5219\u3001\u56de\u8c03\u4e0e\u7b56\u7565\u6a21\u5f0f\u3002\u4f60\u4f1a\u53d1\u73b0\uff0c\u7406\u89e3\u4e86\u63a5\u53e3\uff0c\u624d\u80fd\u771f\u6b63\u7406\u89e3\u73b0\u4ee3 Java \u751f\u6001\u3002<\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>\u62bd\u8c61\u7c7b\u8bb2\u5b8c\u4e86\u3002\u4f60\u77e5\u9053\u7236\u7c7b\u53ef\u4ee5\u53ea\u58f0\u660e\u65b9\u6cd5\u7b7e\u540d\uff0c\u4e0d\u5199\u5b9e\u73b0\u4f53\uff0c\u5f3a\u5236\u5b50\u7c7b\u53bb\u5b9e\u73b0\u3002\u8fd9\u662f\u4e00\u79cd \u300c\u6a21\u677f\u300d \u7684\u601d\u60f3\u3002 \u4f46\u62bd\u8c61\u7c7b [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35,69],"tags":[],"class_list":["post-272","post","type-post","status-publish","format-standard","hentry","category-03-","category-05-interface"],"_links":{"self":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/272","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=272"}],"version-history":[{"count":2,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/272\/revisions"}],"predecessor-version":[{"id":279,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/272\/revisions\/279"}],"wp:attachment":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=272"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=272"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=272"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}