{"id":134358,"date":"2024-04-28T11:54:29","date_gmt":"2024-04-28T03:54:29","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/134358.html"},"modified":"2024-04-28T11:54:33","modified_gmt":"2024-04-28T03:54:33","slug":"java%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0%e5%a4%9a%e7%bb%a7%e6%89%bf","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/134358.html","title":{"rendered":"java\u5982\u4f55\u5b9e\u73b0\u591a\u7ee7\u627f"},"content":{"rendered":"

\"java\u5982\u4f55\u5b9e\u73b0\u591a\u7ee7\u627f\"<\/p>\n

Java\u4e2d\u4e0d\u652f\u6301\u7c7b\u7684\u591a\u7ee7\u627f\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u63a5\u53e3\u591a\u7ee7\u627f\u4ee5\u53ca\u7ec4\u5408\u6280\u672f\u6765\u95f4\u63a5\u5b9e\u73b0<\/strong>\u3002\u8981\u66f4\u8be6\u7ec6\u5730\u89e3\u91ca\uff0c\u7531\u4e8eJava\u8bbe\u8ba1\u65f6\u53ea\u5141\u8bb8\u4e00\u4e2a\u7c7b\u76f4\u63a5\u7ee7\u627f\u81ea\u53e6\u4e00\u4e2a\u7c7b\uff0c\u8fd9\u6837\u505a\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u907f\u514d\u7ee7\u627f\u5e26\u6765\u7684\u590d\u6742\u6027\u548c\u591a\u7ee7\u627f\u65f6\u5bb9\u6613\u4ea7\u751f\u7684\u95ee\u9898\uff0c\u5982\u83f1\u5f62\u7ee7\u627f\u95ee\u9898\u3002\u4f46\u662f\uff0cJava\u4e3a\u4e86\u5f25\u8865\u76f4\u63a5\u591a\u7ee7\u627f\u7684\u4e0d\u8db3\uff0c\u63d0\u4f9b\u4e86\u63a5\u53e3\uff08interface\uff09\u4f5c\u4e3a\u4e00\u79cd\u89e3\u51b3\u65b9\u6848\u3002\u63a5\u53e3\u53ef\u4ee5\u7ee7\u627f\u591a\u4e2a\u5176\u4ed6\u63a5\u53e3\uff0c\u4e14\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3<\/strong>\uff0c\u8fd9\u5728\u672c\u8d28\u4e0a\u63d0\u4f9b\u4e86\u4e00\u79cd\u591a\u7ee7\u627f\u7684\u80fd\u529b\u3002\u6b64\u5916\uff0c\u7ec4\u5408\u6280\u672f\u4e5f\u662f\u4e00\u79cd\u6d41\u884c\u7684\u8bbe\u8ba1\u624b\u6bb5\uff0c\u53ef\u4ee5\u5c06\u591a\u4e2a\u7c7b\u7684\u529f\u80fd\u7ec4\u5408\u5230\u4e00\u4e2a\u7c7b\u4e2d\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u63a5\u53e3\u591a\u7ee7\u627f\u7684\u5b9e\u73b0<\/h3>\n<\/p>\n

\u63a5\u53e3\u5b9a\u4e49\u4e0e\u7ee7\u627f<\/h4>\n<\/p>\n

\u63a5\u53e3\u662f\u4e00\u79cd\u5b8c\u5168\u62bd\u8c61\u7684\u7c7b\uff0c\u5b83\u5141\u8bb8\u58f0\u660e\u65b9\u6cd5\uff0c\u4f46\u4e0d\u5141\u8bb8\u5305\u542b\u65b9\u6cd5\u7684\u5b9e\u73b0\uff08\u76f4\u5230Java 8\u5f15\u5165\u4e86\u9ed8\u8ba4\u65b9\u6cd5default\u548c\u9759\u6001\u65b9\u6cd5static\u4e4b\u524d\uff09\u3002\u4e00\u4e2a\u63a5\u53e3\u53ef\u4ee5\u7ee7\u627f\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u5176\u4ed6\u63a5\u53e3\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u4e0e\u7c7b\u7684\u7ee7\u627f\u76f8\u4f3c\u3002<\/p>\n<\/p>\n

public interface InterfaceA {<\/p>\n
    void methodA();<\/p>\n
}<\/p>\n
public interface InterfaceB {<\/p>\n
    void methodB();<\/p>\n
}<\/p>\n
public interface InterfaceC extends InterfaceA, InterfaceB {<\/p>\n
    void methodC();<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u7c7b\u5b9e\u73b0\u591a\u63a5\u53e3<\/h4>\n<\/p>\n
\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u540c\u65f6\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\uff0c\u5e76\u4e14\u5fc5\u987b\u63d0\u4f9b\u6240\u6709\u63a5\u53e3\u4e2d\u58f0\u660e\u7684\u65b9\u6cd5\u7684\u5b9e\u73b0\u3002<\/p>\n<\/p>\n
public class MultiInheritImplement implements InterfaceA, InterfaceB, InterfaceC {<\/p>\n
    public void methodA() {<\/p>\n
        \/\/ \u5b9e\u73b0\u65b9\u6cd5A\u7684\u7ec6\u8282<\/p>\n
    }<\/p>\n
    public void methodB() {<\/p>\n
        \/\/ \u5b9e\u73b0\u65b9\u6cd5B\u7684\u7ec6\u8282<\/p>\n
    }<\/p>\n
    public void methodC() {<\/p>\n
        \/\/ \u5b9e\u73b0\u65b9\u6cd5C\u7684\u7ec6\u8282<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u7ec4\u5408\uff08Composition\uff09\u5b9e\u73b0\u591a\u7ee7\u627f<\/h3>\n<\/p>\n
\u7ec4\u5408\u57fa\u672c\u6982\u5ff5<\/h4>\n<\/p>\n
\u7ec4\u5408\u662f\u6307\u5728\u4e00\u4e2a\u7c7b\u4e2d\u4ee5\u5bf9\u8c61\u7684\u5f62\u5f0f\u5305\u542b\u5176\u4ed6\u7c7b\u7684\u529f\u80fd\u3002\u8fd9\u79cd\u65b9\u5f0f\u4e0b\uff0c\u4e00\u4e2a\u7c7b\u7684\u5bf9\u8c61\u53ef\u4ee5\u62e5\u6709\u6765\u81ea\u591a\u4e2a\u4e0d\u540c\u7c7b\u7684\u529f\u80fd\u3002<\/p>\n<\/p>\n
\u7ec4\u5408\u7684\u4f7f\u7528<\/h4>\n<\/p>\n
\u901a\u8fc7\u7ec4\u5408\uff0c\u53ef\u4ee5\u5728\u65b0\u7684\u7c7b\u4e2d\u4f7f\u7528\u4e0d\u540c\u7c7b\u7684\u5bf9\u8c61\u6765\u5b9e\u73b0\u591a\u79cd\u529f\u80fd\u7684\u7ec4\u5408\u3002<\/p>\n<\/p>\n
public class FeatureA {<\/p>\n
    public void doSomethingA() {<\/p>\n
        \/\/ \u529f\u80fdA\u7684\u5b9e\u73b0<\/p>\n
    }<\/p>\n
}<\/p>\n
public class FeatureB {<\/p>\n
    public void doSomethingB() {<\/p>\n
        \/\/ \u529f\u80fdB\u7684\u5b9e\u73b0<\/p>\n
    }<\/p>\n
}<\/p>\n
public class CombinedFeatures {<\/p>\n
    private FeatureA featureA = new FeatureA();<\/p>\n
    private FeatureB featureB = new FeatureB();<\/p>\n
    public void doSomethingA() {<\/p>\n
        featureA.doSomethingA();<\/p>\n
    }<\/p>\n
    public void doSomethingB() {<\/p>\n
        featureB.doSomethingB();<\/p>\n
    }<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0cCombinedFeatures<\/code>\u7c7b\u5185\u90e8\u4f7f\u7528\u4e86FeatureA<\/code>\u548cFeatureB<\/code>\u7684\u5bf9\u8c61\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u5b83\u80fd\u591f\u7ec4\u5408\u591a\u4e2a\u7c7b\u7684\u529f\u80fd\uff0c\u4ece\u800c\u95f4\u63a5\u5b9e\u73b0\u4e86\u591a\u7ee7\u627f\u7684\u6548\u679c\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u907f\u514d\u591a\u7ee7\u627f\u65f6\u7684\u95ee\u9898<\/h3>\n<\/p>\n
\u83f1\u5f62\u7ee7\u627f\u95ee\u9898<\/h4>\n<\/p>\n
\u83f1\u5f62\u7ee7\u627f\uff08\u4e5f\u79f0\u4e3a\u94bb\u77f3\u7ee7\u627f\uff09\u662f\u591a\u7ee7\u627f\u4e2d\u7684\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\uff0c\u5f53\u4e24\u4e2a\u5b50\u7c7b\u7ee7\u627f\u540c\u4e00\u4e2a\u57fa\u7c7b\u800c\u53c8\u90fd\u88ab\u53e6\u4e00\u4e2a\u7c7b\u7ee7\u627f\u65f6\u4f1a\u53d1\u751f\u3002Java\u901a\u8fc7\u7981\u6b62\u7c7b\u591a\u7ee7\u627f\u6765\u907f\u514d\u8fd9\u79cd\u95ee\u9898\u3002<\/p>\n<\/p>\n
\u63a5\u53e3\u591a\u7ee7\u627f\u7684\u51b2\u7a81\u89e3\u51b3<\/h4>\n<\/p>\n
\u5c3d\u7ba1Java\u4e0d\u652f\u6301\u7c7b\u7684\u591a\u7ee7\u627f\uff0c\u4f46\u63a5\u53e3\u7684\u591a\u7ee7\u627f\u53ef\u80fd\u5bfc\u81f4\u540d\u5b57\u51b2\u7a81\u3002Java\u6709\u660e\u786e\u7684\u89c4\u5219\u6765\u5904\u7406\u8fd9\u4e9b\u51b2\u7a81\u3002\u5982\u679c\u4e00\u4e2a\u7c7b\u5b9e\u73b0\u4e86\u591a\u4e2a\u63a5\u53e3\uff0c\u4e14\u8fd9\u4e9b\u63a5\u53e3\u4e2d\u542b\u6709\u76f8\u540c\u7b7e\u540d\u7684\u9ed8\u8ba4\u65b9\u6cd5\uff0c\u90a3\u4e48\u7c7b\u5fc5\u987b\u8986\u76d6\u51b2\u7a81\u7684\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
\u56db\u3001\u6700\u4f73\u5b9e\u8df5\u548c\u8bbe\u8ba1\u6a21\u5f0f<\/h3>\n<\/p>\n
\u63a5\u53e3\u548c\u7ec4\u5408\u7684\u6700\u4f73\u5b9e\u8df5<\/h4>\n<\/p>\n
\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u901a\u5e38\u63a8\u8350\u4f7f\u7528\u63a5\u53e3\u548c\u7ec4\u5408\u6765\u8bbe\u8ba1\u7cfb\u7edf\uff0c\u800c\u907f\u514d\u4f7f\u7528\u7ee7\u627f\uff0c\u7279\u522b\u662f\u591a\u7ee7\u627f\u3002\u8fd9\u6837\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u91cd\u7528\u6027\u548c\u7cfb\u7edf\u7684\u7075\u6d3b\u6027\u3002<\/p>\n<\/p>\n
\u8bbe\u8ba1\u6a21\u5f0f\u548c\u591a\u7ee7\u627f<\/h4>\n<\/p>\n
\u67d0\u4e9b\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5982\u88c5\u9970\u5668\u6a21\u5f0f\u3001\u7b56\u7565\u6a21\u5f0f\u7b49\uff0c\u53ef\u4ee5\u5728\u4e0d\u4f7f\u7528\u7c7b\u591a\u7ee7\u627f\u7684\u60c5\u51b5\u4e0b\uff0c\u63d0\u4f9b\u7075\u6d3b\u7684\u65b9\u5f0f\u6765\u6269\u5c55\u529f\u80fd\uff0c\u7ee7\u800c\u5728\u8bbe\u8ba1\u4e0a\u83b7\u53d6\u4e0e\u591a\u7ee7\u627f\u7c7b\u4f3c\u7684\u6548\u679c\u3002<\/p>\n<\/p>\n
\u901a\u8fc7\u4e0a\u8ff0\u8bba\u8ff0\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0cJava\u6ca1\u6709\u7c7b\u7684\u591a\u7ee7\u627f\uff0c\u4f46\u5b83\u63d0\u4f9b\u4e86\u63a5\u53e3\u591a\u7ee7\u627f\u548c\u7ec4\u5408\u6280\u672f\u6765\u89e3\u51b3\u7c7b\u4f3c\u7684\u8bbe\u8ba1\u548c\u67b6\u6784\u95ee\u9898\u3002\u91c7\u7528\u8fd9\u4e9b\u6280\u672f\u53ef\u4ee5\u5728\u4e0d\u727a\u7272\u5c01\u88c5\u6027\u548c\u7834\u574f\u5c42\u6b21\u7ed3\u6784\u7684\u60c5\u51b5\u4e0b\uff0c\u7075\u6d3b\u5730\u6784\u9020\u548c\u6269\u5c55\u5bf9\u8c61\u529f\u80fd\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. Java\u5982\u4f55\u89e3\u51b3\u591a\u7ee7\u627f\u7684\u95ee\u9898\uff1f<\/strong><\/p>\n
\u5728Java\u4e2d\uff0c\u4e00\u4e2a\u7c7b\u53ea\u80fd\u76f4\u63a5\u7ee7\u627f\u81ea\u4e00\u4e2a\u7236\u7c7b\uff0c\u8fd9\u5c31\u610f\u5473\u7740Java\u4e0d\u652f\u6301\u591a\u7ee7\u627f\u3002\u8fd9\u662f\u7531\u4e8e\u591a\u7ee7\u627f\u4f1a\u5f15\u8d77\u4e00\u4e9b\u95ee\u9898\uff0c\u4f8b\u5982\u83f1\u5f62\u7ee7\u627f\u95ee\u9898\u548c\u65b9\u6cd5\u540d\u51b2\u7a81\u7b49\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\uff0cJava\u4f7f\u7528\u4e86\u63a5\u53e3(interface)\u7684\u6982\u5ff5\u3002\u63a5\u53e3\u53ef\u4ee5\u88ab\u7c7b\u5b9e\u73b0\uff0c\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\uff0c\u4ece\u800c\u8fbe\u5230\u591a\u7ee7\u627f\u7684\u6548\u679c\u3002<\/p>\n
2. \u5982\u4f55\u5229\u7528\u63a5\u53e3\u5b9e\u73b0\u591a\u7ee7\u627f\u7684\u529f\u80fd\uff1f<\/strong><\/p>\n
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3. \u5982\u4f55\u5904\u7406\u63a5\u53e3\u4e4b\u95f4\u7684\u51b2\u7a81\uff1f<\/strong><\/p>\n
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