{"id":97741,"date":"2026-08-30T04:48:39","date_gmt":"2026-08-29T20:48:39","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/97741.html"},"modified":"2026-08-30T04:48:39","modified_gmt":"2026-08-29T20:48:39","slug":"java%e5%9f%ba%e7%a1%80-%e6%8a%bd%e8%b1%a1%e7%b1%bb%e5%92%8c%e6%8e%a5%e5%8f%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/97741.html","title":{"rendered":"Java\u57fa\u7840--\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3"},"content":{"rendered":"

\u62bd\u8c61\u7c7b：<\/h2>\n

Java\u4e2d\u6709\u4e00\u4e2a\u5173\u952e\u5b57：abstract，\u53ef\u4ee5\u7528\u4e8e\u4fee\u9970\u7c7b\u3001\u6210\u5458\u65b9\u6cd5<\/p>\n

\"\"<\/p>\n

\n

\"\"<\/p>\n

\n

\u6ce8\u610f\u4e8b\u9879：<\/p>\n

1\u3001\u62bd\u8c61\u7c7b\u4e2d\u4e0d\u4e00\u5b9a\u8981\u6709\u62bd\u8c61\u65b9\u6cd5，\u6709\u62bd\u8c61\u65b9\u6cd5\u7684\u7c7b\u5fc5\u987b\u662f\u62bd\u8c61\u7c7b<\/p>\n

2\u3001\u7c7b\u4e2d\u6709\u7684\u6210\u5458：\u6210\u5458\u53d8\u91cf\u3001\u65b9\u6cd5\u3001\u6784\u9020\u5668\u3001\u62bd\u8c61\u7c7b\u90fd\u53ef\u4ee5\u6709<\/p>\n

3\u3001\u62bd\u8c61\u7c7b\u4e0d\u80fd\u521b\u5efa\u5bf9\u8c61，\u4ec5\u4f5c\u4e3a\u4e00\u79cd\u7279\u6b8a\u7684\u7236\u7c7b，\u8ba9\u5b50\u7c7b\u7ee7\u627f\u5e76\u5b9e\u73b0<\/p>\n

4\u3001\u4e00\u4e2a\u7c7b\u7ee7\u627f\u62bd\u8c61\u7c7b，\u5fc5\u987b\u91cd\u5199\u7236\u7c7b\u4e2d\u7684\u6240\u6709\u62bd\u8c61\u65b9\u6cd5，\u5426\u5219\u8fd9\u4e2a\u7c7b\u4e5f\u5fc5\u987b\u5b9a\u4e49\u6210\u62bd\u8c61\u7c7b<\/p>\n

\n

\n

\u4f7f\u7528\u62bd\u8c61\u7c7b\u7684\u597d\u5904：\u7236\u7c7b\u77e5\u9053\u5b50\u7c7b\u90fd\u8981\u505a\u67d0\u4e2a\u884c\u4e3a，\u4f46\u6bcf\u4e2a\u5b50\u7c7b\u8981\u505a\u7684\u60c5\u51b5\u4e0d\u4e00\u6837，\u7236\u7c7b\u5c31\u5b9a\u4e49\u4e3a\u62bd\u8c61\u65b9\u6cd5，\u4ea4\u7ed9\u5b50\u7c7b\u53bb\u91cd\u5199\u3002<\/p>\n

\u6211\u4eec\u8bbe\u8ba1\u8fd9\u6837\u7684\u62bd\u8c61\u7c7b，\u5c31\u662f\u4e3a\u4e86\u66f4\u597d\u5730\u652f\u6301\u591a\u6001<\/p>\n

\n

\u6ce8\u610f：\u62bd\u8c61\u65b9\u6cd5\u4e0d\u80fd\u6709\u65b9\u6cd5\u4f53<\/p>\n

\u63a5\u53e3：<\/h2>\n

\u63a5\u53e3\u53ef\u4ee5\u770b\u505a\u4e00\u4e2a\u7279\u6b8a\u7684\u62bd\u8c61\u7c7b<\/p>\n

jdk8\u4e4b\u524d \u63a5\u53e3\u91cc\u9762\u53ea\u80fd\u5b9a\u4e49\u5e38\u91cf\u548c\u62bd\u8c61\u65b9\u6cd5<\/p>\n

\u6ce8\u610f：<\/p>\n

\u63a5\u53e3\u4e2d\u5b9a\u4e49\u5e38\u91cf\u65f6\u53ef\u4ee5\u7701\u7565public static final，\u9ed8\u8ba4\u4f1a\u52a0\u4e0a\u53bb<\/p>\n

\u63a5\u53e3\u4e2d\u5b9a\u4e49\u62bd\u8c61\u65b9\u6cd5\u53ef\u4ee5\u7701\u7565public abstract，\u9ed8\u8ba4\u4f1a\u52a0\u4e0a\u53bb<\/p>\n

\u4e0e\u62bd\u8c61\u7c7b\u7c7b\u4f3c，\u63a5\u53e3\u4e0d\u80fd\u521b\u5efa\u5bf9\u8c61<\/p>\n

\n

\u63a5\u53e3\u662f\u7528\u6765\u88ab\u7c7b\u5b9e\u73b0(implement)\u7684，\u5b9e\u73b0\u63a5\u53e3\u7684\u7c7b\u6210\u4e3a\u5b9e\u73b0\u7c7b，\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u540c\u65f6\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3<\/p>\n

\n

\u63a5\u53e3\u7684\u597d\u5904：<\/p>\n

\u5f25\u8865\u4e86\u7c7b\u5355\u7ee7\u627f\u7684\u4e0d\u8db3，\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u540c\u65f6\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3，\u4f7f\u7c7b\u7684\u89d2\u8272\u66f4\u591a，\u529f\u80fd\u66f4\u5f3a\u5927<\/p>\n

\u8ba9\u7a0b\u5e8f\u53ef\u4ee5\u9762\u5411\u63a5\u53e3\u7f16\u7a0b，\u53ef\u4ee5\u66f4\u7075\u6d3b\u65b9\u4fbf\u5730\u5207\u6362\u5404\u79cd\u4e1a\u52a1\u5b9e\u73b0，\u66f4\u5229\u4e8e\u89e3\u8026\u5408<\/p>\n

\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u540c\u65f6\u7ee7\u627f\u4e00\u4e2a\u7c7b，\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3<\/p>\n

class Student extends People implements Driver, Boyfriend { }<\/p>\n

\n

jdk8\u4e4b\u540e，\u63a5\u53e3\u65b0\u589e\u4e86\u4e09\u79cd\u5f62\u5f0f\u7684\u65b9\u6cd5<\/p>\n

\u9ed8\u8ba4\u65b9\u6cd5：\u5fc5\u987b\u52a0default\u5173\u952e\u5b57\u4fee\u9970（\u9ed8\u8ba4\u4e3apublic），\u4f7f\u5f97\u53ef\u4ee5\u5728\u63a5\u53e3\u5185\u5b9a\u4e49\u5b9e\u4f53\u51fd\u6570，\u8981\u7528\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\u7684\u5bf9\u8c61\u6765\u8c03\u7528<\/p>\n

\n

\u79c1\u6709\u65b9\u6cd5（jdk9\u5f00\u59cb\u652f\u6301）：\u7528private\u5173\u952e\u5b57\u4fee\u9970，\u5728\u63a5\u53e3\u5185\u5b9a\u4e49\u5b9e\u4f53\u51fd\u6570，\u8981\u7528\u63a5\u53e3\u5185\u5176\u4ed6\u7684\u5b9e\u4f53\u65b9\u6cd5\u6765\u8c03\u7528，\u4e0d\u80fd\u5728\u63a5\u53e3\u5916\u8c03\u7528<\/p>\n

\n

\u9759\u6001\u65b9\u6cd5：\u7528static\u5173\u952e\u5b57\u4fee\u9970（\u9ed8\u8ba4\u4e3apublic），\u5728\u63a5\u53e3\u5185\u5b9a\u4e49\u5b9e\u4f53\u51fd\u6570，\u53ea\u80fd\u4f7f\u7528\u5f53\u524d\u63a5\u53e3\u540d\u6765\u8c03\u7528<\/p>\n

\n

\u63a5\u53e3\u7684\u6ce8\u610f\u4e8b\u9879：<\/p>\n

1.\u63a5\u53e3\u4e0e\u63a5\u53e3\u53ef\u4ee5\u591a\u7ee7\u627f：\u4e00\u4e2a\u63a5\u53e3\u53ef\u4ee5\u540c\u65f6\u7ee7\u627f\u591a\u4e2a\u63a5\u53e3（\u63a5\u53e3\u7ee7\u627f\u65f6\u7528extends）<\/p>\n

2.\u4e00\u4e2a\u63a5\u53e3\u7ee7\u627f\u591a\u4e2a\u63a5\u53e3，\u5982\u679c\u591a\u4e2a\u63a5\u53e3\u4e2d\u5b58\u5728\u65b9\u6cd5\u7b7e\u540d\u51b2\u7a81（\u65b9\u6cd5\u540d\u548c\u53c2\u6570\u5217\u8868\u5b8c\u5168\u4e00\u6837，\u8fd4\u56de\u503c\u4e0d\u4e00\u6837），\u5219\u6b64\u65f6\u4e0d\u652f\u6301\u591a\u7ee7\u627f，\u4e5f\u4e0d\u652f\u6301\u591a\u5b9e\u73b0<\/p>\n

3.\u4e00\u4e2a\u7c7b\u7ee7\u627f\u4e86\u7236\u7c7b，\u53c8\u540c\u65f6\u5b9e\u73b0\u4e86\u63a5\u53e3，\u5982\u679c\u7236\u7c7b\u4e2d\u548c\u63a5\u53e3\u4e2d\u6709\u540c\u540d\u7684\u9ed8\u8ba4\u65b9\u6cd5，\u5b9e\u73b0\u5668\u4f1a\u4f18\u5148\u7528\u7236\u7c7b\u7684<\/p>\n

4.\u4e00\u4e2a\u7c7b\u5b9e\u73b0\u4e86\u591a\u4e2a\u63a5\u53e3，\u5982\u679c\u591a\u4e2a\u63a5\u53e3\u4e2d\u5b58\u5728\u540c\u540d\u7684\u9ed8\u8ba4\u65b9\u6cd5，\u53ef\u4ee5\u4e0d\u51b2\u7a81，\u8fd9\u4e2a\u7c7b\u91cd\u5199\u8be5\u65b9\u6cd5\u5373\u53ef<\/p>\n

\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u7684\u76f8\u540c\u548c\u4e0d\u540c：<\/p>\n

\u76f8\u540c：<\/p>\n

1.\u90fd\u662f\u62bd\u8c61\u5f62\u5f0f，\u90fd\u53ef\u4ee5\u6709\u62bd\u8c61\u65b9\u6cd5，\u90fd\u4e0d\u80fd\u521b\u5efa\u5bf9\u8c61<\/p>\n

2.\u90fd\u662f\u6d3e\u751f\u5b50\u7c7b\u5f62\u5f0f，\u62bd\u8c61\u7c7b\u662f\u88ab\u5b50\u7c7b\u7ee7\u627f\u4f7f\u7528，\u63a5\u53e3\u662f\u88ab\u5b9e\u73b0\u7c7b\u5b9e\u73b0<\/p>\n

3.\u4e00\u4e2a\u7c7b\u7ee7\u627f\u62bd\u8c61\u7c7b，\u6216\u8005\u5b9e\u73b0\u63a5\u53e3，\u90fd\u5fc5\u987b\u91cd\u5199\u5b8c\u4ed6\u4eec\u7684\u62bd\u8c61\u65b9\u6cd5，\u5426\u5219\u81ea\u5df1\u8981\u6210\u4e3a\u62bd\u8c61\u7c7b<\/p>\n

4.\u90fd\u80fd\u652f\u6301\u591a\u6001，\u90fd\u80fd\u591f\u5b9e\u73b0\u89e3\u8026\u5408<\/p>\n

\n

\u4e0d\u540c：<\/p>\n

1.\u62bd\u8c61\u7c7b\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u7c7b\u7684\u5168\u90e8\u666e\u901a\u6210\u5458，\u63a5\u53e3\u53ea\u80fd\u5b9a\u4e49\u5e38\u91cf\u3001\u62bd\u8c61\u65b9\u6cd5<\/p>\n

2.\u62bd\u8c61\u7c7b\u53ea\u80fd\u88ab\u7c7b\u5355\u7ee7\u627f，\u63a5\u53e3\u53ef\u4ee5\u88ab\u7c7b\u591a\u5b9e\u73b0<\/p>\n","protected":false},"excerpt":{"rendered":"

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