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\n\u4ece\u67d0\u79cd\u610f\u4e49\u4e0a\u8bf4\uff0cinterface\u662f\u4e00\u79cd\u7279\u6b8a\u5f62\u5f0f\u7684 abstract class\u3002.
\n\u4e0b\u9762\u770b\u4e0b\u8fd9\u4e24\u8005\u7684\u5177\u4f53\u7684\u533a\u522b\u3002
\n\u8bed\u6cd5\u89d2\u5ea6\uff1a
\n1\u3001\u62bd\u8c61\u7c7b \u7528abstract\u5b9a\u4e49\uff0c\u800c\u63a5\u53e3\u7528interface\u5b9a\u4e49
\n2\u3001\u62bd\u8c61\u7c7b\u53ef\u4ee5\u6709\u81ea\u5df1\u7684\u6570\u636e\u6210\u5458\uff0c\u53d8\u91cf\u9ed8\u8ba4\u662f friendly \u578b\uff0c\u5176\u503c\u53ef\u4ee5\u5728\u5b50\u7c7b\u4e2d\u91cd\u65b0\u5b9a\u4e49\uff0c\u4e5f\u53ef\u4ee5\u91cd\u65b0\u8d4b\u503c\uff1b
\n \u800c\u63a5\u53e3\u53ea\u80fd\u591f\u6709\u9759\u6001\u7684\u4e0d\u80fd\u88ab\u4fee\u6539\u7684\u6570\u636e\u6210\u5458\uff08\u53d8\u91cf\u9ed8\u8ba4\u662fpublic static final \u578b\uff0c\u4e14\u5fc5\u987b\u7ed9\u5176\u521d\u503c\uff0c\u6240\u4ee5\u5b9e\u73b0\u7c7b\u4e2d\u4e0d\u80fd\u91cd\u65b0\u5b9a\u4e49\uff0c\u4e5f\u4e0d\u80fd\u6539\u53d8\u5176\u503c\uff0c\u4e0d\u8fc7\u5728interface\u4e2d\u4e00\u822c\u4e0d\u5b9a\u4e49\u6570\u636e\u6210\u5458\uff09\uff0c\u63a5\u53e3\u4e2d\u6240\u6709\u7684\u6210\u5458\u65b9\u6cd5\u90fd\u662fabstract\u7684
\n3.\u62bd\u8c61\u7c7b\u53ef\u4ee5\u6709\u975e abstract\u7684\u6210\u5458\u65b9\u6cd5\uff0c\u800c\u63a5\u53e3\u4e2d\u7684\u65b9\u6cd5\u9ed8\u8ba4\u90fd\u662f public,abstract \u7c7b\u578b\u7684\uff0c\u800c\u4e14\u5728abstract\u4e2d\u7684\u65b9\u6cd5\u5fc5\u987b\u6709\u65b9\u6cd5\u4f53\uff08\u5373{}\uff09\uff0c\u5373\u4f7f\u4e0d\u5b9e\u73b0\u4efb\u4f55\u529f\u80fd\uff1b\u800c\u63a5\u53e3\u4e2d\u5219\u4e0d\u80fd\u6709\u65b9\u6cd5\u4f53\uff1b
\n4\u3001\u62bd\u8c61\u7c7b\u53ef\u4ee5\u63d0\u4f9b\u67d0\u4e9b\u65b9\u6cd5\u7684\u90e8\u5206\u5b9e\u73b0\uff0c\u800cJava\u63a5\u53e3\u5374\u4e0d\u53ef\u4ee5
\n5\u3001\u5b9e\u73b0\u62bd\u8c61\u7c7b\u7684\u7c7b\u53ef\u4ee5\u4e0d\u5b9e\u73b0\u62bd\u8c61\u7c7b\u4e2d\u7684\u6240\u6709\u65b9\u6cd5\uff0c\u800c\u63a5\u53e3\u7684\u7c7b\u5fc5\u987b\u5b9e\u73b0\u5176\u4e2d\u7684\u6240\u6709\u65b9\u6cd5\u3002 <\/p>\n
\u7f16\u7a0b\u89d2\u5ea6\uff1a
\n1\u3001\u62bd\u8c61\u7c7b\u5728 Java \u8bed\u8a00\u4e2d\u8868\u793a\u7684\u662f\u4e00\u79cd\u7ee7\u627f\u5173\u7cfb\uff0cjava\u4e2d\u4e0d\u5141\u8bb8\u591a\u7ee7\u627f\uff0c\u4e00\u4e2a\u7c7b\u53ea\u80fd\u4f7f\u7528\u4e00\u6b21\u7ee7\u627f\u5173\u7cfb\u3002\u4f46\u662f\uff0c\u4e00\u4e2a\u7c7b\u5374\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2ainterface
\n2\u3001\u5728\u62bd\u8c61\u7c7b\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u8d4b\u4e88\u65b9\u6cd5\u7684\u9ed8\u8ba4\u884c\u4e3a\u3002\u4f46\u662f\u5728\u63a5\u53e3\u4e2d\uff0c\u65b9\u6cd5\u5374\u4e0d\u80fd\u62e5\u6709\u9ed8\u8ba4\u884c\u4e3a\uff0c\u4e3a\u4e86\u7ed5\u8fc7\u8fd9\u4e2a\u9650\u5236\uff0c\u5fc5\u987b\u4f7f\u7528\u59d4\u6258 \u3010
\n \u5728 \u62bd\u8c61\u7c7b\u4e2d\u4e0d\u80fd\u5b9a\u4e49\u9ed8\u8ba4\u884c\u4e3a\u8fd8\u5b58\u5728\u53e6\u4e00\u4e2a\u6bd4\u8f83\u4e25\u91cd\u7684\u95ee\u9898\uff0c\u90a3\u5c31\u662f\u53ef\u80fd\u4f1a\u9020\u6210\u7ef4\u62a4\u4e0a\u7684\u9ebb\u70e6\u3002\u56e0 \u4e3a\u5982\u679c\u540e\u6765\u60f3\u4fee\u6539\u7c7b\u7684\u754c\u9762\uff08\u4e00\u822c\u901a\u8fc7 abstract class \u6216\u8005interface\u6765\u8868\u793a\uff09\u4ee5\u9002\u5e94\u65b0\u7684\u60c5\u51b5\uff08\u6bd4\u5982\uff0c\u6dfb\u52a0\u65b0\u7684\u65b9\u6cd5\u6216\u8005\u7ed9\u5df2\u7528\u7684\u65b9\u6cd5\u4e2d\u6dfb \u52a0\u65b0\u7684\u53c2\u6570\uff09\u65f6\uff0c\u5c31\u4f1a\u975e\u5e38\u7684\u9ebb\u70e6\uff0c\u53ef\u80fd\u8981\u82b1\u8d39\u5f88\u591a\u7684\u65f6\u95f4\uff08\u5bf9\u4e8e\u6d3e\u751f\u7c7b\u5f88\u591a\u7684\u60c5\u51b5\uff0c\u5c24\u4e3a\u5982\u6b64\uff09\u3002\u4f46\u662f\u5982\u679c\u754c\u9762\u662f\u901a\u8fc7abstract class\u6765\u5b9e\u73b0\u7684\uff0c\u90a3 \u4e48\u53ef\u80fd\u5c31\u53ea\u9700\u8981\u4fee\u6539\u5b9a\u4e49\u5728abstract class\u4e2d\u7684\u9ed8\u8ba4\u884c\u4e3a\u5c31\u53ef\u4ee5\u4e86\u3002
\n\u3000\u3000\u540c\u6837\uff0c\u5982\u679c\u4e0d\u80fd\u5728\u62bd\u8c61\u7c7b\u4e2d\u5b9a\u4e49\u9ed8\u8ba4\u884c\u4e3a\uff0c\u5c31\u4f1a\u5bfc\u81f4\u540c\u6837\u7684\u65b9\u6cd5\u5b9e\u73b0\u51fa\u73b0\u5728\u8be5\u62bd\u8c61\u7c7b\u7684\u6bcf\u4e00\u4e2a\u6d3e\u751f\u7c7b\u4e2d\uff0c\u8fdd\u53cd\u4e86 “one rule\uff0cone place” \u539f\u5219\uff0c\u9020\u6210\u4ee3\u7801\u91cd\u590d\uff0c\u540c\u6837\u4e0d\u5229\u4e8e\u4ee5\u540e\u7684\u7ef4\u62a4\u3002\u56e0\u6b64\uff0c\u5728abstract class\u548cinterface\u95f4\u8fdb\u884c\u9009\u62e9\u65f6\u8981\u975e\u5e38\u7684\u5c0f\u5fc3
\n\u3011 <\/p>\n
\u8bbe\u8ba1\u7406\u5ff5\uff1a
\n1\u3001abstract class\u548cinterface\u6240\u53cd\u6620\u51fa\u7684\u8bbe\u8ba1\u7406\u5ff5\u4e0d\u540c\u3002\u5176\u5b9eabstract class\u8868\u793a\u7684\u662f”is-a”\u5173\u7cfb\uff0cinterface\u8868\u793a\u7684\u662f”like-a”\u5173\u7cfb
\n2\u3001Java\u62bd\u8c61\u7c7b\u5728Java\u8bed\u8a00\u4e2d\u4f53\u73b0\u4e86\u4e00\u79cd\u7ee7\u627f\u5173\u7cfb\uff0c\u5373\u7236\u7c7b\u548c\u6d3e\u751f\u7c7b\u5728\u6982\u5ff5\u672c\u8d28\u4e0a\u5e94\u8be5\u662f\u76f8\u540c\u7684\uff0c\u800c\u5bf9\u4e8eJava\u63a5\u53e3\u5219\u4e0d\u7136\uff0c\u5e76\u4e0d\u8981\u6c42Java\u63a5\u53e3\u7684\u5b9e\u73b0\u8005\u548c\u63a5\u53e3\u5b9a\u4e49\u5728\u6982\u5ff5\u672c\u8d28\u4e0a\u662f\u4e00\u81f4\u7684\uff0c\u4ec5\u4ec5\u662f\u5b9e\u73b0\u4e86\u63a5\u53e3\u5b9a\u4e49\u7684\u5951\u7ea6\u800c\u5df2 <\/p>\n
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