\u5728\u62bd\u8c61\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff1b\u4f46\u5728\u63a5\u53e3(interface)\u4e2d\uff0c\u6240\u6709\u7684\u65b9\u6cd5\u5fc5\u987b\u90fd\u662f\u62bd\u8c61\u7684\uff0c\u4e0d\u80fd\u6709\u65b9\u6cd5\u4f53\uff0c\u5b83\u6bd4\u62bd\u8c61\u7c7b\u66f4\u52a0\u201c\u62bd\u8c61\u201d\u3002<\/p>\n
\u63a5\u53e3\u4f7f\u7528 interface \u5173\u952e\u5b57\u6765\u58f0\u660e\uff0c\u53ef\u4ee5\u770b\u505a\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u62bd\u8c61\u7c7b\uff0c\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e2a\u7c7b\u5fc5\u987b\u505a\u4ec0\u4e48\uff0c\u800c\u4e0d\u662f\u89c4\u5b9a\u5b83\u5982\u4f55\u53bb\u505a\u3002
\n<\/p>\n
\u73b0\u5b9e\u4e2d\u4e5f\u6709\u5f88\u591a\u63a5\u53e3\u7684\u5b9e\u4f8b\uff0c\u6bd4\u5982\u8bf4\u4e32\u53e3\u7535\u8111\u786c\u76d8\uff0cSerial ATA\u59d4\u5458\u4f1a\u6307\u5b9a\u4e86Serial ATA 2.0\u89c4\u8303\uff0c\u8fd9\u79cd\u89c4\u8303\u5c31\u662f\u63a5\u53e3\u3002Serial ATA\u59d4\u5458\u4f1a\u4e0d\u8d1f\u8d23\u751f\u4ea7\u786c\u76d8\uff0c\u53ea\u662f\u6307\u5b9a\u901a\u7528\u7684\u89c4\u8303\u3002<\/p>\n
\u5e0c\u6377\u3001\u65e5\u7acb\u3001\u4e09\u661f\u7b49\u751f\u4ea7\u5382\u5bb6\u4f1a\u6309\u7167\u89c4\u8303\u751f\u4ea7\u7b26\u5408\u63a5\u53e3\u7684\u786c\u76d8\uff0c\u8fd9\u4e9b\u786c\u76d8\u5c31\u53ef\u4ee5\u5b9e\u73b0\u901a\u7528\u5316\uff0c\u5982\u679c\u6b63\u5728\u7528\u4e00\u5757160G\u65e5\u7acb\u7684\u4e32\u53e3\u786c\u76d8\uff0c\u73b0\u5728\u8981\u5347\u7ea7\u4e86\uff0c\u53ef\u4ee5\u8d2d\u4e70\u4e00\u5757320G\u7684\u5e0c\u6377\u4e32\u53e3\u786c\u76d8\uff0c\u5b89\u88c5\u4e0a\u53bb\u5c31\u53ef\u4ee5\u7ee7\u7eed\u4f7f\u7528\u4e86\u3002<\/p>\n
\u4e0b\u9762\u7684\u4ee3\u7801\u53ef\u4ee5\u6a21\u62dfSerial ATA\u59d4\u5458\u4f1a\u5b9a\u4e49\u4ee5\u4e0b\u4e32\u53e3\u786c\u76d8\u63a5\u53e3\uff1a
\n[java]\/\/\u4e32\u884c\u786c\u76d8\u63a5\u53e3
\npublic interface SataHdd{
\n\u00a0\u00a0\u00a0 \/\/\u8fde\u63a5\u7ebf\u7684\u6570\u91cf
\n\u00a0\u00a0\u00a0 public static final int CONNECT_LINE=4;
\n\u00a0\u00a0\u00a0 \/\/\u5199\u6570\u636e
\n\u00a0\u00a0\u00a0 public void writeData(String data);
\n\u00a0\u00a0\u00a0 \/\/\u8bfb\u6570\u636e
\n\u00a0\u00a0\u00a0 public String readData();
\n}[\/java]
\n\u6ce8\u610f\uff1a\u63a5\u53e3\u4e2d\u58f0\u660e\u7684\u6210\u5458\u53d8\u91cf\u9ed8\u8ba4\u90fd\u662f public static final \u7684\uff0c\u5fc5\u987b\u663e\u793a\u7684\u521d\u59cb\u5316\u3002\u56e0\u800c\u5728\u5e38\u91cf\u58f0\u660e\u65f6\u53ef\u4ee5\u7701\u7565\u8fd9\u4e9b\u4fee\u9970\u7b26\u3002<\/p>\n
\u63a5\u53e3\u662f\u82e5\u5e72\u5e38\u91cf\u548c\u62bd\u8c61\u65b9\u6cd5\u7684\u96c6\u5408\uff0c\u76ee\u524d\u770b\u6765\u548c\u62bd\u8c61\u7c7b\u5dee\u4e0d\u591a\u3002\u786e\u5b9e\u5982\u6b64\uff0c\u63a5\u53e3\u672c\u5c31\u662f\u4ece\u62bd\u8c61\u7c7b\u4e2d\u6f14\u5316\u800c\u6765\u7684\uff0c\u56e0\u800c\u9664\u7279\u522b\u89c4\u5b9a\uff0c\u63a5\u53e3\u4eab\u6709\u548c\u7c7b\u540c\u6837\u7684\u201c\u5f85\u9047\u201d\u3002\u6bd4\u5982\uff0c\u6e90\u7a0b\u5e8f\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u591a\u4e2a\u7c7b\u6216\u63a5\u53e3\uff0c\u4f46\u6700\u591a\u53ea\u80fd\u6709\u4e00\u4e2apublic \u7684\u7c7b\u6216\u63a5\u53e3\uff0c\u5982\u679c\u6709\u5219\u6e90\u6587\u4ef6\u5fc5\u987b\u53d6\u548cpublic\u7684\u7c7b\u548c\u63a5\u53e3\u76f8\u540c\u7684\u540d\u5b57\u3002\u548c\u7c7b\u7684\u7ee7\u627f\u683c\u5f0f\u4e00\u6837\uff0c\u63a5\u53e3\u4e4b\u95f4\u4e5f\u53ef\u4ee5\u7ee7\u627f\uff0c\u5b50\u63a5\u53e3\u53ef\u4ee5\u7ee7\u627f\u7236\u63a5\u53e3\u4e2d\u7684\u5e38\u91cf\u548c\u62bd\u8c61\u65b9\u6cd5\u5e76\u6dfb\u52a0\u65b0\u7684\u62bd\u8c61\u65b9\u6cd5\u7b49\u3002<\/p>\n
\u4f46\u63a5\u53e3\u6709\u5176\u81ea\u8eab\u7684\u4e00\u4e9b\u7279\u6027\uff0c\u5f52\u7eb3\u5982\u4e0b\u3002<\/p>\n
1) \u63a5\u53e3\u4e2d\u53ea\u80fd\u5b9a\u4e49\u62bd\u8c61\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u9ed8\u8ba4\u4e3a public abstract \u7684\uff0c\u56e0\u800c\u5728\u58f0\u660e\u65b9\u6cd5\u65f6\u53ef\u4ee5\u7701\u7565\u8fd9\u4e9b\u4fee\u9970\u7b26\u3002\u8bd5\u56fe\u5728\u63a5\u53e3\u4e2d\u5b9a\u4e49\u5b9e\u4f8b\u53d8\u91cf\u3001\u975e\u62bd\u8c61\u7684\u5b9e\u4f8b\u65b9\u6cd5\u53ca\u9759\u6001\u65b9\u6cd5\uff0c\u90fd\u662f\u975e\u6cd5\u7684\u3002\u4f8b\u5982\uff1a
\n[java]public interface SataHdd{
\n\u00a0\u00a0\u00a0 \/\/\u8fde\u63a5\u7ebf\u7684\u6570\u91cf
\n\u00a0\u00a0\u00a0 public int connectLine; \/\/\u7f16\u8bd1\u51fa\u9519\uff0cconnectLine\u88ab\u770b\u505a\u9759\u6001\u5e38\u91cf\uff0c\u5fc5\u987b\u663e\u5f0f\u521d\u59cb\u5316
\n\u00a0\u00a0\u00a0 \/\/\u5199\u6570\u636e
\n\u00a0\u00a0\u00a0 protected void writeData(String data); \/\/\u7f16\u8bd1\u51fa\u9519\uff0c\u5fc5\u987b\u662fpublic\u7c7b\u578b
\n\u00a0\u00a0\u00a0 \/\/\u8bfb\u6570\u636e
\n\u00a0\u00a0\u00a0 public static String readData(){ \/\/\u7f16\u8bd1\u51fa\u9519\uff0c\u63a5\u53e3\u4e2d\u4e0d\u80fd\u5305\u542b\u9759\u6001\u65b9\u6cd5
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return "\u6570\u636e"; \/\/\u7f16\u8bd1\u51fa\u9519\uff0c\u63a5\u53e3\u4e2d\u53ea\u80fd\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\uff0c
\n\u00a0\u00a0\u00a0 }
\n}[\/java]<\/p>\n
3) \u63a5\u53e3\u4e2d\u6ca1\u6709\u6784\u9020\u65b9\u6cd5\uff0c\u4e0d\u80fd\u88ab\u5b9e\u4f8b\u5316\u3002<\/p>\n
4) \u4e00\u4e2a\u63a5\u53e3\u4e0d\u5b9e\u73b0\u53e6\u4e00\u4e2a\u63a5\u53e3\uff0c\u4f46\u53ef\u4ee5\u7ee7\u627f\u591a\u4e2a\u5176\u4ed6\u63a5\u53e3\u3002\u63a5\u53e3\u7684\u591a\u7ee7\u627f\u7279\u70b9\u5f25\u8865\u4e86\u7c7b\u7684\u5355\u7ee7\u627f\u3002\u4f8b\u5982\uff1a
\n[java]\/\/\u4e32\u884c\u786c\u76d8\u63a5\u53e3
\npublic interface SataHdd extends A,B{
\n\u00a0\u00a0\u00a0 \/\/ \u8fde\u63a5\u7ebf\u7684\u6570\u91cf
\n\u00a0\u00a0\u00a0 public static final int CONNECT_LINE = 4;
\n\u00a0\u00a0\u00a0 \/\/ \u5199\u6570\u636e
\n\u00a0\u00a0\u00a0 public void writeData(String data);
\n\u00a0\u00a0\u00a0 \/\/ \u8bfb\u6570\u636e
\n\u00a0\u00a0\u00a0 public String readData();
\n}
\ninterface A{
\n\u00a0\u00a0\u00a0 public void a();
\n}
\ninterface B{
\n\u00a0\u00a0\u00a0 public void b();
\n}[\/java]
\n\u4e3a\u4ec0\u4e48\u4f7f\u7528\u63a5\u53e3<\/p>\n
\u5927\u578b\u9879\u76ee\u5f00\u53d1\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u4ece\u7ee7\u627f\u94fe\u7684\u4e2d\u95f4\u63d2\u5165\u4e00\u4e2a\u7c7b\uff0c\u8ba9\u5b83\u7684\u5b50\u7c7b\u5177\u5907\u67d0\u4e9b\u529f\u80fd\u800c\u4e0d\u5f71\u54cd\u5b83\u4eec\u7684\u7236\u7c7b\u3002\u4f8b\u5982 A -> B -> C -> D -> E\uff0cA \u662f\u7956\u5148\u7c7b\uff0c\u5982\u679c\u9700\u8981\u4e3aC\u3001D\u3001E\u7c7b\u6dfb\u52a0\u67d0\u4e9b\u901a\u7528\u7684\u529f\u80fd\uff0c\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u8ba9C\u7c7b\u518d\u7ee7\u627f\u53e6\u5916\u4e00\u4e2a\u7c7b\u3002\u4f46\u662f\u95ee\u9898\u6765\u4e86\uff0cJava \u662f\u4e00\u79cd\u5355\u7ee7\u627f\u7684\u8bed\u8a00\uff0c\u4e0d\u80fd\u518d\u8ba9C\u7ee7\u627f\u53e6\u5916\u4e00\u4e2a\u7236\u7c7b\u4e86\uff0c\u53ea\u5230\u79fb\u52a8\u5230\u7ee7\u627f\u94fe\u7684\u6700\u9876\u7aef\uff0c\u8ba9A\u518d\u7ee7\u627f\u4e00\u4e2a\u7236\u7c7b\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u5bf9C\u3001D\u3001E\u7c7b\u7684\u4fee\u6539\uff0c\u5f71\u54cd\u5230\u4e86\u6574\u4e2a\u7ee7\u627f\u94fe\uff0c\u4e0d\u5177\u5907\u53ef\u63d2\u5165\u6027\u7684\u8bbe\u8ba1\u3002<\/p>\n
\u63a5\u53e3\u662f\u53ef\u63d2\u5165\u6027\u7684\u4fdd\u8bc1\u3002\u5728\u4e00\u4e2a\u7ee7\u627f\u94fe\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u7c7b\u90fd\u53ef\u4ee5\u5b9e\u73b0\u4e00\u4e2a\u63a5\u53e3\uff0c\u8fd9\u4e2a\u63a5\u53e3\u4f1a\u5f71\u54cd\u5230\u6b64\u7c7b\u7684\u6240\u6709\u5b50\u7c7b\uff0c\u4f46\u4e0d\u4f1a\u5f71\u54cd\u5230\u6b64\u7c7b\u7684\u4efb\u4f55\u7236\u7c7b\u3002\u6b64\u7c7b\u5c06\u4e0d\u5f97\u4e0d\u5b9e\u73b0\u8fd9\u4e2a\u63a5\u53e3\u6240\u89c4\u5b9a\u7684\u65b9\u6cd5\uff0c\u800c\u5b50\u7c7b\u53ef\u4ee5\u4ece\u6b64\u7c7b\u81ea\u52a8\u7ee7\u627f\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u8fd9\u65f6\u5019\uff0c\u8fd9\u4e9b\u5b50\u7c7b\u5177\u6709\u4e86\u53ef\u63d2\u5165\u6027\u3002<\/p>\n
\u6211\u4eec\u5173\u5fc3\u7684\u4e0d\u662f\u54ea\u4e00\u4e2a\u5177\u4f53\u7684\u7c7b\uff0c\u800c\u662f\u8fd9\u4e2a\u7c7b\u662f\u5426\u5b9e\u73b0\u4e86\u6211\u4eec\u9700\u8981\u7684\u63a5\u53e3\u3002<\/p>\n
\u63a5\u53e3\u63d0\u4f9b\u4e86\u5173\u8054\u4ee5\u53ca\u65b9\u6cd5\u8c03\u7528\u4e0a\u7684\u53ef\u63d2\u5165\u6027\uff0c\u8f6f\u4ef6\u7cfb\u7edf\u7684\u89c4\u6a21\u8d8a\u5927\uff0c\u751f\u547d\u5468\u671f\u8d8a\u957f\uff0c\u63a5\u53e3\u4f7f\u5f97\u8f6f\u4ef6\u7cfb\u7edf\u7684\u7075\u6d3b\u6027\u548c\u53ef\u6269\u5c55\u6027\uff0c\u53ef\u63d2\u5165\u6027\u65b9\u9762\u5f97\u5230\u4fdd\u8bc1\u3002<\/p>\n
\u63a5\u53e3\u5728\u9762\u5411\u5bf9\u8c61\u7684 Java \u7a0b\u5e8f\u8bbe\u8ba1\u4e2d\u5360\u6709\u4e3e\u8db3\u8f7b\u91cd\u7684\u5730\u4f4d\u3002\u4e8b\u5b9e\u4e0a\u5728\u8bbe\u8ba1\u9636\u6bb5\u6700\u91cd\u8981\u7684\u4efb\u52a1\u4e4b\u4e00\u5c31\u662f\u8bbe\u8ba1\u51fa\u5404\u90e8\u5206\u7684\u63a5\u53e3\uff0c\u7136\u540e\u901a\u8fc7\u63a5\u53e3\u7684\u7ec4\u5408\uff0c\u5f62\u6210\u7a0b\u5e8f\u7684\u57fa\u672c\u6846\u67b6\u7ed3\u6784\u3002
\n\u63a5\u53e3\u7684\u4f7f\u7528<\/p>\n
\u63a5\u53e3\u7684\u4f7f\u7528\u4e0e\u7c7b\u7684\u4f7f\u7528\u6709\u4e9b\u4e0d\u540c\u3002\u5728\u9700\u8981\u4f7f\u7528\u7c7b\u7684\u5730\u65b9\uff0c\u4f1a\u76f4\u63a5\u4f7f\u7528new\u5173\u952e\u5b57\u6765\u6784\u5efa\u4e00\u4e2a\u7c7b\u7684\u5b9e\u4f8b\uff0c\u4f46\u63a5\u53e3\u4e0d\u53ef\u4ee5\u8fd9\u6837\u4f7f\u7528\uff0c\u56e0\u4e3a\u63a5\u53e3\u4e0d\u80fd\u76f4\u63a5\u4f7f\u7528 new \u5173\u952e\u5b57\u6765\u6784\u5efa\u5b9e\u4f8b\u3002<\/p>\n
\u63a5\u53e3\u5fc5\u987b\u901a\u8fc7\u7c7b\u6765\u5b9e\u73b0(implements)\u5b83\u7684\u62bd\u8c61\u65b9\u6cd5\uff0c\u7136\u540e\u518d\u5b9e\u4f8b\u5316\u7c7b\u3002\u7c7b\u5b9e\u73b0\u63a5\u53e3\u7684\u5173\u952e\u5b57\u4e3aimplements\u3002<\/p>\n
\u5982\u679c\u4e00\u4e2a\u7c7b\u4e0d\u80fd\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u6240\u6709\u62bd\u8c61\u65b9\u6cd5\uff0c\u90a3\u4e48\u8fd9\u4e2a\u7c7b\u5fc5\u987b\u88ab\u5b9a\u4e49\u4e3a\u62bd\u8c61\u65b9\u6cd5\u3002<\/p>\n
\u4e0d\u5141\u8bb8\u521b\u5efa\u63a5\u53e3\u7684\u5b9e\u4f8b\uff0c\u4f46\u5141\u8bb8\u5b9a\u4e49\u63a5\u53e3\u7c7b\u578b\u7684\u5f15\u7528\u53d8\u91cf\uff0c\u8be5\u53d8\u91cf\u6307\u5411\u4e86\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n
\u4e00\u4e2a\u7c7b\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u7236\u7c7b\uff0c\u4f46\u5374\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\u3002<\/p>\n
\u5b9e\u73b0\u63a5\u53e3\u7684\u683c\u5f0f\u5982\u4e0b\uff1a
\n\u4fee\u9970\u7b26 class \u7c7b\u540d extends \u7236\u7c7b implements \u591a\u4e2a\u63a5\u53e3 {
\n\u00a0\u00a0\u00a0 \u5b9e\u73b0\u65b9\u6cd5
\n}<\/p>\n
\u8bf7\u770b\u4e0b\u9762\u7684\u4f8b\u5b50\uff1a
\n[java]import static java.lang.System.*;
\npublic class Demo{
\n\u00a0 public static void main(String[] args) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0 SataHdd sh1=new SeagateHdd(); \/\/\u521d\u59cb\u5316\u5e0c\u6377\u786c\u76d8
\n\u00a0\u00a0\u00a0\u00a0\u00a0 SataHdd sh2=new SamsungHdd(); \/\/\u521d\u59cb\u5316\u4e09\u661f\u786c\u76d8
\n\u00a0 }
\n}
\n\/\/\u4e32\u884c\u786c\u76d8\u63a5\u53e3
\ninterface SataHdd{
\n\u00a0\u00a0\u00a0 \/\/\u8fde\u63a5\u7ebf\u7684\u6570\u91cf
\n\u00a0\u00a0\u00a0 public static final int CONNECT_LINE=4;
\n\u00a0\u00a0\u00a0 \/\/\u5199\u6570\u636e
\n\u00a0\u00a0\u00a0 public void writeData(String data);
\n\u00a0\u00a0\u00a0 \/\/\u8bfb\u6570\u636e
\n\u00a0\u00a0\u00a0 public String readData();
\n}
\n\/\/ \u7ef4\u4fee\u786c\u76d8\u63a5\u53e3
\ninterface fixHdd{
\n\u00a0\u00a0\u00a0 \/\/ \u7ef4\u4fee\u5730\u5740
\n\u00a0\u00a0\u00a0 String address = "\u5317\u4eac\u5e02\u6d77\u6dc0\u533a";
\n\u00a0\u00a0\u00a0 \/\/ \u5f00\u59cb\u7ef4\u4fee
\n\u00a0\u00a0\u00a0 boolean doFix();
\n}
\n\/\/\u5e0c\u6377\u786c\u76d8
\nclass SeagateHdd implements SataHdd, fixHdd{
\n\u00a0\u00a0\u00a0 \/\/\u5e0c\u6377\u786c\u76d8\u8bfb\u53d6\u6570\u636e
\n\u00a0\u00a0\u00a0 public String readData(){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return "\u6570\u636e";
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 \/\/\u5e0c\u6377\u786c\u76d8\u5199\u5165\u6570\u636e
\n\u00a0\u00a0\u00a0 public void writeData(String data) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 out.println("\u5199\u5165\u6210\u529f");
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 \/\/ \u7ef4\u4fee\u5e0c\u6377\u786c\u76d8
\n\u00a0\u00a0\u00a0 public boolean doFix(){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return true;
\n\u00a0\u00a0\u00a0 }
\n}
\n\/\/\u4e09\u661f\u786c\u76d8
\nclass SamsungHdd implements SataHdd{
\n\u00a0\u00a0\u00a0 \/\/\u4e09\u661f\u786c\u76d8\u8bfb\u53d6\u6570\u636e
\n\u00a0\u00a0\u00a0 public String readData(){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return "\u6570\u636e";
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 \/\/\u4e09\u661f\u786c\u76d8\u5199\u5165\u6570\u636e
\n\u00a0\u00a0\u00a0 public void writeData(String data){
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 out.println("\u5199\u5165\u6210\u529f");
\n\u00a0\u00a0\u00a0 }
\n}
\n\/\/\u67d0\u52a3\u8d28\u786c\u76d8\uff0c\u4e0d\u80fd\u5199\u6570\u636e
\nabstract class XXHdd implements SataHdd{
\n\u00a0\u00a0\u00a0 \/\/\u786c\u76d8\u8bfb\u53d6\u6570\u636e
\n\u00a0\u00a0\u00a0 public String readData() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return "\u6570\u636e";
\n\u00a0\u00a0\u00a0 }
\n}[\/java]
\n\u63a5\u53e3\u4f5c\u4e3a\u7c7b\u578b\u4f7f\u7528<\/p>\n
\u63a5\u53e3\u4f5c\u4e3a\u5f15\u7528\u7c7b\u578b\u6765\u4f7f\u7528\uff0c\u4efb\u4f55\u5b9e\u73b0\u8be5\u63a5\u53e3\u7684\u7c7b\u7684\u5b9e\u4f8b\u90fd\u53ef\u4ee5\u5b58\u50a8\u5728\u8be5\u63a5\u53e3\u7c7b\u578b\u7684\u53d8\u91cf\u4e2d\uff0c\u901a\u8fc7\u8fd9\u4e9b\u53d8\u91cf\u53ef\u4ee5\u8bbf\u95ee\u7c7b\u4e2d\u6240\u5b9e\u73b0\u7684\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\uff0cJava \u8fd0\u884c\u65f6\u7cfb\u7edf\u4f1a\u52a8\u6001\u5730\u786e\u5b9a\u5e94\u8be5\u4f7f\u7528\u54ea\u4e2a\u7c7b\u4e2d\u7684\u65b9\u6cd5\uff0c\u5b9e\u9645\u4e0a\u662f\u8c03\u7528\u76f8\u5e94\u7684\u5b9e\u73b0\u7c7b\u7684\u65b9\u6cd5\u3002<\/p>\n
\u793a\u4f8b\u5982\u4e0b\uff1a
\n[java]public class Demo{
\n\u00a0\u00a0\u00a0 public void test1(A a) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 a.doSth();
\n\u00a0\u00a0\u00a0 }
\n\u00a0\u00a0\u00a0 public static void main(String[] args) {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Demo d = new Demo();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 A a = new B();
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 d.test1(a);
\n\u00a0\u00a0\u00a0 }
\n}
\ninterface A {
\n\u00a0\u00a0\u00a0 public int doSth();
\n}
\nclass B implements A {
\n\u00a0\u00a0\u00a0 public int doSth() {
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 System.out.println("now in B");
\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return 123;
\n\u00a0\u00a0\u00a0 }
\n}
\n\u8fd0\u884c\u7ed3\u679c\uff1a
\nnow in B[\/java]<\/p>\n
\u5927\u5bb6\u770b\u5230\u63a5\u53e3\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u7c7b\u578b\u6765\u4f7f\u7528\uff0c\u628a\u63a5\u53e3\u4f5c\u4e3a\u65b9\u6cd5\u7684\u53c2\u6570\u548c\u8fd4\u56de\u7c7b\u578b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5728\u62bd\u8c61\u7c7b\u4e2d\uff0c\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u6216\u591a\u4e2a\u62bd\u8c61\u65b9\u6cd5\uff1b\u4f46\u5728\u63a5\u53e3(interface)\u4e2d\uff0c\u6240\u6709\u7684\u65b9\u6cd5\u5fc5\u987b\u90fd\u662f\u62bd\u8c61\u7684\uff0c\u4e0d\u80fd\u6709\u65b9\u6cd5 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[17],"tags":[40],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/124"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=124"}],"version-history":[{"count":2,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/124\/revisions"}],"predecessor-version":[{"id":327,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/124\/revisions\/327"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}