{"id":31420,"date":"2023-05-30T16:25:10","date_gmt":"2023-03-11T04:30:53","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%87%8d%e6%96%b0%e5%ae%a1%e8%a7%86java%e7%9a%84%e6%b3%9b%e5%9e%8b%e5%8a%9f%e8%83%bd\/"},"modified":"2024-04-30T06:38:29","modified_gmt":"2024-04-29T22:38:29","slug":"%e9%87%8d%e6%96%b0%e5%ae%a1%e8%a7%86java%e7%9a%84%e6%b3%9b%e5%9e%8b%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e9%87%8d%e6%96%b0%e5%ae%a1%e8%a7%86java%e7%9a%84%e6%b3%9b%e5%9e%8b%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u91cd\u65b0\u5ba1\u89c6Java\u7684\u6cdb\u578b\u529f\u80fd"},"content":{"rendered":"

\u5927\u7eb2<\/h3>\n

Java\u5f15\u5165\u4e86\u6cdb\u578b\uff0c\u6dfb\u52a0\u4e86\u7c7b\u578b\u53c2\u6570\uff0c\u53c2\u6570\u8fb9\u754c\uff0c\u534f\u53d8\uff0c\u9006\u53d8\uff0c\u4e0d\u53d8\uff0c\u901a\u914d\u7b26\u7b49\u7b49\u5404\u79cd\u8bed\u6cd5\u548c\u529f\u80fd\u3002\u5982\u679c\u641c\u7d22\u4e00\u4e0b\uff0c\u5c31\u53ef\u4ee5\u627e\u5230\u5f88\u591a\u89e3\u91ca\u6cdb\u578b\u8bed\u6cd5\u548c\u8fd9\u4e9b\u65b0\u529f\u80fd\uff08\u867d\u7136\u5df2\u7ecf\u4e0d\u65b0\u4e86\uff09\u7684\u9875\u9762\uff0c\u89e3\u91ca\u5f97\u975e\u5e38\u6613\u61c2\u3002\u4f46\u662f\uff0c\u5982\u679c\u53ea\u662f\u4f7f\u7528\u5e26\u6709\u6cdb\u578b\u7684\u7c7b\u5e93\uff0c\u8fd8\u597d\u8bf4\uff0c\u4f46\u662f\u5982\u679c\u8981\u5728\u81ea\u5df1\u7684\u7c7b\u5b9a\u4e49\u4e2d\u4f7f\u7528\u6cdb\u578b\uff0c\u5c31\u4f1a\u9047\u5230\u201c\u90a3\u4e48\uff0c\u8be5\u600e\u4e48\u529e\uff1f\u201d\u7684\u95ee\u9898\u3002\u6211\u4e4b\u524d\u4e00\u76f4\u968f\u4fbf\u4f7f\u7528\u6cdb\u578b\uff0c\u4f46\u662f\u6700\u8fd1\u4e0b\u4e86\u4e00\u756a\u51b3\u5fc3\u8ba4\u771f\u601d\u8003\uff0c\u603b\u7ed3\u4e86\u4e00\u4e9b\u5b9e\u7528\u7684\u6280\u5de7\u3002
\n\u56e0\u6b64\uff0c\u672c\u6587\u7701\u7565\u4e86\u5bf9\u6cdb\u578b\u8bed\u6cd5\u548c\u542b\u4e49\u7684\u89e3\u91ca\u3002\u800c\u4e14\uff0c\u6211\u4e0d\u80fd\u4fdd\u8bc1\u8bf4\u7684\u90fd\u662f\u6b63\u786e\u7684\uff0c\u53ea\u662f\u4e2a\u4eba\u7406\u89e3\uff0c\u5982\u679c\u6709\u9519\u8bef\u4e4b\u5904\uff0c\u8bf7\u6307\u6b63\u3002<\/p>\n

\u56e0\u4e3a\u4f3c\u4e4e\u4f1a\u53d8\u5f97\u5f88\u5197\u957f\uff0c\u6240\u4ee5\u5148\u516c\u5f00\u4e00\u4e0b\uff0c\u4f46\u8fd8\u6253\u7b97\u8ffd\u52a0\u6a21\u5f0f\u7b49\u5185\u5bb9\u3002<\/div>\n
\n

\u4ece\u4e00\u5f00\u59cb<\/h3>\n

\u4f7f\u7528\u6cdb\u578b\u7684\u76ee\u7684\u662f\u4e3a\u4e86\u7c7b\u81ea\u8eab\uff0c\u5e76\u8003\u8651\u7c7b\u6240\u5305\u542b\u7684\u53d8\u91cf\u3002\u5178\u578b\u7684\u4f8b\u5b50\u662f\u96c6\u5408\u6846\u67b6\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u8003\u8651\u4f7f\u7528\u8fb9\u754c\u548c\u901a\u914d\u7b26\u7b49\u5176\u4ed6\u60c5\u51b5\uff08\u867d\u7136\u6700\u7ec8\u5f52\u7ed3\u4e3a\u540c\u6837\u7684\u4e8b\u60c5\uff09\u3002<\/p>\n

\u8fd9\u91cc\u5c06\u901a\u8fc7\u4ee5\u4e0b\u4f8b\u5b50\u8fdb\u884c\u5177\u4f53\u89e3\u91ca\u3002\u4e3a\u4e86\u65b9\u4fbf\u60a8\u590d\u5236\u7c98\u8d34\u8fdb\u884c\u786e\u8ba4\uff0c\u6211\u5c06\u5168\u90e8\u5199\u51fa\u6765\u3002<\/p>\n

public<\/span> class<\/span> Human<\/span> {<\/span>\r\n\tpublic<\/span> void<\/span> hello<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello Human\"<\/span>);<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\nclass<\/span> Man<\/span> extends<\/span> Human<\/span> {<\/span>\r\n\t@Override<\/span>\r\n\tpublic<\/span> void<\/span> hello<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello Man\"<\/span>);<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\nclass<\/span> Woman<\/span> extends<\/span> Human<\/span> {<\/span>\r\n\t@Override<\/span>\r\n\tpublic<\/span> void<\/span> hello<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello Woman\"<\/span>);<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
public<\/span> class<\/span> House<\/span> {<\/span>\r\n\tpublic<\/span> void<\/span> hello<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello House\"<\/span>);<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u91cc\u6709\u56db\u4e2a\u7c7b\uff0c\u6211\u4eec\u8003\u8651\u4e00\u4e2a\u5305\u542b\u8fd9\u4e9b\u7c7b\u7684\u5bb9\u5668\u7c7b\u3002<\/p>\n
public<\/span> class<\/span> Container<\/span> {<\/span>\r\n\t\r\n\tprivate<\/span> Human<\/span> human<\/span>;<\/span>\r\n\t\r\n\tpublic<\/span> Container<\/span>(<\/span>Human<\/span> human<\/span>)<\/span> {<\/span>\r\n\t\tthis<\/span>.<\/span>human<\/span> =<\/span> human<\/span>;<\/span>\r\n\t}<\/span>\t\r\n\tpublic<\/span> Human<\/span> get<\/span>()<\/span> {<\/span>\r\n\t\thuman<\/span>.<\/span>hello<\/span>();<\/span>\r\n\t\treturn<\/span> human<\/span>;<\/span>\r\n\t}<\/span>\t\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> ...<\/span>args<\/span>)<\/span> {<\/span>\r\n\t\tHuman<\/span> human<\/span> =<\/span> new<\/span> Human<\/span>();<\/span>\r\n\t\tMan<\/span> man<\/span> =<\/span> new<\/span> Man<\/span>();<\/span>\r\n\t\tWoman<\/span> woman<\/span> =<\/span> new<\/span> Woman<\/span>();<\/span>\r\n\t\t\t\r\n\t\tContainer<\/span> humanContainer<\/span> =<\/span> new<\/span> Container<\/span>(<\/span>human<\/span>);<\/span>\r\n\t\tContainer<\/span> manContainer<\/span> =<\/span> new<\/span> Container<\/span>(<\/span>man<\/span>);<\/span>\r\n\t\tContainer<\/span> womanContainer<\/span> =<\/span> new<\/span> Container<\/span>(<\/span>woman<\/span>);<\/span>\r\n\t\thumanContainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t\tmanContainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t\twomanContainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e0d\u9700\u8981\u89e3\u91ca\uff0c\u6267\u884c\u6b64\u64cd\u4f5c\u5c06\u83b7\u5f97\u4ee5\u4e0b\u7ed3\u679c\u3002<\/p>\n
Hello Human\r\nHello Man\r\nHello Woman\r\n<\/code><\/pre>\n
\u7531\u4e8e”Human”\u3001”Man”\u548c”Woman”\u4e4b\u95f4\u5b58\u5728\u7ee7\u627f\u5173\u7cfb\uff0c\u56e0\u6b64\u53ef\u4ee5\u6267\u884chuman.hello()\u3002<\/p>\n
\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u8bd5\u7740\u5f15\u5165\u6cdb\u578b\u3002<\/p>\n
public<\/span> class<\/span> GenContainer<\/span><<\/span>T<\/span> extends<\/span> Human<\/span>><\/span> {<\/span>\r\n\tprivate<\/span> T<\/span> t<\/span>;<\/span>\t\r\n\tpublic<\/span> GenContainer<\/span>(<\/span>T<\/span> t<\/span>)<\/span> {<\/span>\r\n\t\tthis<\/span>.<\/span>t<\/span> =<\/span> t<\/span>;<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> T<\/span> get<\/span>()<\/span> {<\/span>\r\n\t\tt<\/span>.<\/span>hello<\/span>();<\/span>\r\n\t\treturn<\/span> t<\/span>;<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> ...<\/span>args<\/span>)<\/span> {<\/span>\r\n\t\tHuman<\/span> human<\/span> =<\/span> new<\/span> Human<\/span>();<\/span>\r\n\t\tMan<\/span> man<\/span> =<\/span> new<\/span> Man<\/span>();<\/span>\r\n\t\tWoman<\/span> woman<\/span> =<\/span> new<\/span> Woman<\/span>();<\/span>\r\n\t\t\r\n\t\tGenContainer<\/span><<\/span>Human<\/span>><\/span> humanContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>human<\/span>);<\/span>\r\n\t\tGenContainer<\/span><<\/span>Man<\/span>><\/span>   manContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>man<\/span>);<\/span>\r\n\t\tGenContainer<\/span><<\/span>Woman<\/span>><\/span> womanContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>woman<\/span>);<\/span>\r\n\t\t\r\n\t\thumanContainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t\tmanContainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t\twomanContainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t}<\/span>\t\t\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u8fd9\u4e2a\uff0c<\/p>\n
Hello Human\r\nHello Man\r\nHello Woman\r\n<\/code><\/pre>\n
\u5f97\u5230\u76f8\u540c\u7684\u7ed3\u679c\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u901a\u8fc7\u5c06\u7c7b\u578b\u53c2\u6570T\u7684\u4e0a\u9650\u754c\u9650\u8bbe\u4e3aHuman\uff0c\u4f7f\u5f97\u53ef\u4ee5\u6267\u884ct.hello()\u3002\u4f46\u662f\uff0c\u5982\u679c\u76ee\u7684\u662f\u81f3\u5c11\u5c06T\u89c6\u4e3aHuman\u6765\u5904\u7406\uff0c\u90a3\u4e48\u6211\u8ba4\u4e3a\u4e0d\u9700\u8981\u4f7f\u7528\u6cdb\u578b\u3002<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u5f15\u5165\u4ee5\u4e0b\u7684\u8bfe\u7a0b<\/p>\n
public<\/span> class<\/span> User<\/span><<\/span>T<\/span> extends<\/span> Human<\/span>><\/span> {<\/span>\r\n\t\r\n\tprotected<\/span> T<\/span> t<\/span>;<\/span>\r\n\t\r\n\tpublic<\/span> void<\/span> usebycon<\/span>(<\/span>Container<\/span> container<\/span>)<\/span> {<\/span> ---(<\/span>1<\/span>)<\/span>\r\n\t\t\/\/t = container.get(); \/\/ compile error     <\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> void<\/span> strictUsebygen<\/span>(<\/span>GenContainer<\/span><<\/span>T<\/span>><\/span> gencontainer<\/span>)<\/span> {<\/span> ---(<\/span>2<\/span>)<\/span>\r\n\t\tt<\/span> =<\/span> gencontainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t\tt<\/span>.<\/span>hello<\/span>();<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> void<\/span> relaxUsebygen<\/span>(<\/span>GenContainer<\/span><?<\/span> extends<\/span> T<\/span>><\/span> genContainer<\/span>)<\/span> {<\/span> ---(<\/span>3<\/span>)<\/span>\r\n\t\tt<\/span> =<\/span> genContainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t\tt<\/span>.<\/span>hello<\/span>();<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> ...<\/span>args<\/span>)<\/span> {<\/span>\r\n\t\tHuman<\/span> human<\/span> =<\/span> new<\/span> Human<\/span>();<\/span>\r\n\t\tMan<\/span> man<\/span> =<\/span> new<\/span> Man<\/span>();<\/span>\r\n\t\tWoman<\/span> woman<\/span> =<\/span> new<\/span> Woman<\/span>();<\/span>\r\n\t\tHouse<\/span> house<\/span> =<\/span> new<\/span> House<\/span>();<\/span>\r\n\t\tGenContainer<\/span><<\/span>Human<\/span>><\/span> humanContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>human<\/span>);<\/span>\r\n\t\tGenContainer<\/span><<\/span>Man<\/span>><\/span>   manContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>man<\/span>);<\/span>\r\n\t\tGenContainer<\/span><<\/span>Woman<\/span>><\/span> womanContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>woman<\/span>);<\/span>\r\n\t\t\/\/GenContainer<House> houseContainer = new GenContainer<>(house); \/\/ compile error --- (*)<\/span>\r\n\t\t\r\n\t\tUser<\/span><<\/span>Human<\/span>><\/span> user<\/span> =<\/span> new<\/span> User<\/span><>();<\/span>     ---<\/span> (<\/span>4<\/span>)<\/span>\r\n\t\tuser<\/span>.<\/span>strictUsebygen<\/span>(<\/span>humanContainer<\/span>);<\/span>\r\n\t\t\/\/user.strictUsebygen(manContainer); \/\/ compile error<\/span>\r\n\t\tuser<\/span>.<\/span>relaxUsebygen<\/span>(<\/span>manContainer<\/span>);<\/span>    ---<\/span> (<\/span>5<\/span>)<\/span>\r\n\t\t\t\t\r\n\t\t\/\/user.strictUsebygen(houseContainer); \/\/ compile error ---(**)<\/span>\r\n\t\t\/\/user.relaxUsebygen(houseContainer);  \/\/ compile error<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7531\u4e8e\u6267\u884c\u7ed3\u679c\u6ca1\u6709\u610f\u4e49\uff0c\u56e0\u6b64\u88ab\u7701\u7565\u3002
\n\u9996\u5148\uff0ccontainer.get()\u8fd4\u56de\u7684\u662fHuman\uff0c\u800cT extends Human\uff0c\u4f46t = container.get()\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002\u4e3a\u4ec0\u4e48\uff0c\u6211\u4e0d\u77e5\u9053\uff08\u7b11\uff09\u3002\u4f46\u81f3\u5c11\u7f16\u8bd1\u4e0d\u901a\u8fc7\uff08\u867d\u7136\u7406\u8bba\u4e0a\u5e94\u8be5\u662f\u6b63\u786e\u7684\uff09\u3002\u7136\u800c\uff0c\u5728\u60c5\u51b52\u4e2d\uff0c\u7f16\u8bd1\u662f\u901a\u8fc7\u7684\u3002\u8fd9\u8868\u660e\u6cdb\u578b\u5728\u7c7b\u4e4b\u95f4\u4ea4\u4e92\u4f20\u9012\u7c7b\u5185\u5305\u542b\u7684\u5bf9\u8c61\u65f6\u5f88\u6709\u7528\u3002<\/p>\n
\u53e6\u5916\uff0c\u5728(4)\u4e2d\uff0c\u7531\u4e8e\u5c06Human\u4f5c\u4e3aUser\u7684\u7c7b\u578b\u53c2\u6570\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u8c03\u7528humanContainer(\u7c7b\u578b\u53c2\u6570\u4e3aHuman)\uff0c\u4f46\u662f\u5982\u679c\u7ed9\u51famanContainer\uff0c\u5219\u7531\u4e8e\u6cdb\u578b\u7684\u4e0d\u53d8\u6027\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u7c7b\u578b\u8fb9\u754c\u6765\u5141\u8bb8manContainer\uff0c\u5982(3)\u6240\u793a\u3002\u8fd9\u91cc\u6211\u4eec\u4f7f\u7528\u7684\u662f\u4e0a\u9650\u8fb9\u754c(extends)\uff0c\u8fd9\u53d6\u51b3\u4e8e\u5728\u7c7b\u4e4b\u95f4\u4f20\u9012\u7684\u5bf9\u8c61\u7684\u7c7b\u578b\u5173\u7cfb(PUT\/GET\u7b49\u7b49\uff0c\u4e5f\u79f0\u4e3aPECS)\u3002\u4f46\u662f\uff0c\u4e2a\u4eba\u800c\u8a00\u6211\u5bf9\u6b64\u7406\u89e3\u8d77\u6765\u56f0\u96be\uff0c\u611f\u5230\u5f88\u56f0\u6270…<\/p>\n
\u4e0b\u9762\u6211\u4eec\u6765\u8ba8\u8bba(*)\u7684\u7f16\u8bd1\u9519\u8bef\u3002\u5bfc\u81f4\u51fa\u73b0\u9519\u8bef\u7684\u539f\u56e0\u662f\uff0c<\/p>\n
class<\/span> GenContainer<\/span><<\/span>T<\/span> extends<\/span> Human<\/span>><\/span>\r\n<\/code><\/pre>\n
\u7531\u4e8e\u6839\u636e\u5b9a\u4e49\uff0cT\u7684\u4e0a\u9650\u662fHuman\uff0c\u800cHouse\u5e76\u4e0d\u662fHuman\u7684\u6d3e\u751f\u7c7b\u3002\u56e0\u6b64\uff0c<\/p>\n
class<\/span> GenContainer<\/span><<\/span>T<\/span>><\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u6539\u53d8\u5b9a\u4e49\uff0c\u7f16\u8bd1\u5c31\u80fd\u901a\u8fc7\u3002(\u5728GenContainer\u7684t.hello()\u4f1a\u51fa\u73b0\u9519\u8bef\uff0c\u4f46\u8fd9\u91cc\u7701\u7565\u4e86\u3002)
\n\u7136\u800c\uff0c\u5728(**)\u4ecd\u7136\u4f1a\u4ea7\u751f\u7f16\u8bd1\u9519\u8bef(\u7ed9\u51fa\u7f16\u8bd1\u9519\u8bef)\u3002\u8fd9\u662f\u56e0\u4e3a<\/p>\n
class<\/span> User<\/span><<\/span>T<\/span> extends<\/span> Human<\/span>><\/span>\r\n<\/code><\/pre>\n
\u56e0\u4e3aT\u88ab\u8bbe\u5b9a\u4e3aHuman\u4e3a\u4e0a\u9650\u7684\u539f\u56e0\u3002<\/p>\n
\u4ece\u76ee\u524d\u7684\u5bf9\u8bdd\u4e2d\uff0c\u6211\u8ba4\u4e3a\u53ef\u4ee5\u5f97\u51fa\u4ee5\u4e0b\u7ed3\u8bba\u3002<\/p>\n
    \n
  • \n
      \u30b3\u30f3\u30c6\u30ca\u3068\u3057\u3066\u30af\u30e9\u30b9\u3092\u4f7f\u3044\u305f\u3044\u5834\u5408\u306f\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u3092\u5c0e\u5165(\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u304c\u3042\u308b\u306e\u3067\uff0c\u81ea\u4f5c\u3059\u308b\u6a5f\u4f1a\u306f\u5c11\u306a\u3044\u304b\u3082)<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u65e2\u5b58\u30af\u30e9\u30b9\u3067\u578b\u5f15\u6570\u3092\u5c0e\u5165\u3057\u3066\u3044\u308b\u30af\u30e9\u30b9\u306b\uff0c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5185\u5305\u3059\u308b\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u6e21\u3059\u5834\u5408(e.g., GenContainer\u306e\u3088\u3046\u306a)<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            \n
          • \n
              \u65e2\u5b58\u30af\u30e9\u30b9\u3067\u578b\u5f15\u6570\u3092\u5c0e\u5165\u3057\u3066\u304a\u308a\uff0c\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u5185\u5305\u3059\u308b\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d7\u3051\u53d6\u308b\u5834\u5408<\/ul>\n<\/li>\n<\/ul>\n
               <\/p>\n
                \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6e21\u3059\u3068\u304d\u306b\u306f\uff0c\u578b\u5883\u754c\u3092\u5c0e\u5165\u3057\u3066\u5236\u9650\u3092\u7de9\u3081\u308b(\u4e0a\u9650\/\u4e0b\u9650\u3068\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u4f7f\u7528)<\/ul>\n
                \u800c\u4e14\uff0c\u901a\u8fc7\u8fd9\u4e9b\u6240\u505a\u7684\u4e8b\u60c5\u5f97\u5230\u7684\u6548\u679c\u662f\u7c7b\u578b\u5b89\u5168\u7684\uff08\u5f53\u7136\uff0c\u662f\u7684\uff09\u3002\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c(**)\u90e8\u5206\u7edd\u5bf9\u4e0d\u80fd\u901a\u8fc7\u7f16\u8bd1\u3002\u6240\u4ee5\uff0c\u4e0d\u4ec5\u4ec5\u662f\u9650\u5236\u53c2\u6570\u4e3aGenContainer\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u8fd8\u9650\u5236\u4e86GenContainer\u6240\u5305\u542b\u7684\u5bf9\u8c61\u7684\u7c7b\u578b\u3002\u8fd9\u662f\u7406\u6240\u5f53\u7136\u7684\u4e8b\u60c5…<\/p>\n
                \u800c\u4e14\uff0c\u8fd8\u6709\u4e00\u70b9\u3002\u611f\u89c9\u6709\u53ef\u80fd\u505a\u4e00\u4e9b\u8be1\u8ba1\uff0c\u4f46\u5b9e\u9645\u4e0a\u5e76\u975e\u5982\u6b64\uff08\u5728\u300aEffective Java\u300b\u4e2d\u4e5f\u6709\u4e9b\u4ecb\u7ecd\uff09\u3002\u56e0\u4e3a\u5b83\u53ea\u662f\u4e3a\u4e86\u4fdd\u8bc1\u7c7b\u578b\u5b89\u5168\u800c\u5b58\u5728\u7684\u673a\u5236\uff0c\u6240\u4ee5\u4f7f\u7528\u573a\u666f\u662f\u6709\u9650\u7684\uff0c\u53ef\u4ee5\u8003\u8651\u4e3a\u6b64\u800c\u505a\u597d\u9650\u5236\uff08\u4e5f\u53ef\u80fd\u53ea\u662f\u6211\u4e0d\u4e86\u89e3\uff0c\u8bf7\u8c05\u89e3\uff09\u3002<\/p>\n
                \n
                \u4ee5\u4e0b\u5185\u5bb9\u7684\u4e2d\u6587\u540c\u4e49\u8bcd\uff1a\u6a21\u5f0f<\/h3>\n
                \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5f15\u5165\u6cdb\u578b\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\uff0c\u63a5\u4e0b\u6765\u4f1a\u4e3e\u4f8b\u8bf4\u660e\uff08\u7eaf\u5c5e\u4e2a\u4eba\u610f\u89c1\uff09\u3002\u5f53\u7f16\u5199\u6b63\u5f0f\u7684\u7a0b\u5e8f\u65f6\uff0c\u901a\u5e38\u4f1a\u9996\u5148\u521b\u5efa\u63a5\u53e3\uff0c\u7136\u540e\u662f\uff08\u5982\u679c\u9700\u8981\u7684\u8bdd\uff09\u62bd\u8c61\u7c7b\u548c\u5177\u4f53\u7c7b\u3002\u6cdb\u578b\u6709\u591a\u5c11\u5178\u578b\u5e94\u7528\u573a\u666f\uff0c\u6211\u4e0d\u592a\u6e05\u695a\uff0c\u4f46\u5148\u4ece\u6211\u80fd\u60f3\u5230\u7684\u5f00\u59cb\u3002\u6211\u4f1a\u4e0d\u65ad\u66f4\u65b0\uff08\u5e0c\u671b\u80fd\u591f\uff09\u3002<\/p>\n
                \u5728\u5177\u6709\u7ee7\u627f\u5173\u7cfb\u7684\u4e00\u7ec4\u7c7b\u4e2d\u8fdb\u884c\u65b9\u6cd5\u94fe\u8c03\u7528<\/h4>\n
                \u5982\u679c\u60f3\u8981\u5bf9\u5177\u6709\u7ee7\u627f\u5173\u7cfb\u7684\u7c7b\u6267\u884c\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
                class<\/span> A<\/span> {<\/span>\r\n  A<\/span> do1<\/span>()<\/span> {..<\/span>return<\/span> this<\/span>;}<\/span>\r\n  A<\/span> do2<\/span>()<\/span> {..<\/span>return<\/span> this<\/span>;}<\/span>\r\n  A<\/span> do3<\/span>()<\/span> {..<\/span>return<\/span> this<\/span>;}<\/span>\r\n\r\n  public<\/span> static<\/span> void<\/span> main<\/span>(...)<\/span> {<\/span>\r\n      new<\/span> A<\/span>().<\/span>do1<\/span>().<\/span>do2<\/span>().<\/span>do3<\/span>();<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u7ee7\u627f\u8fd9\u4e2a\u7c7b\u5e76\u6dfb\u52a0\u65b9\u6cd5\u3002<\/p>\n
                class<\/span> B<\/span> extends<\/span> A<\/span> {<\/span>\r\n   B<\/span> do4<\/span>()<\/span> {..<\/span>return<\/span> this<\/span>;}<\/span>\r\n   public<\/span> static<\/span> void<\/span> main<\/span>(...)<\/span> {<\/span>\r\n     new<\/span> B<\/span>().<\/span>do1<\/span>().<\/span>do2<\/span>().<\/span>do3<\/span>().<\/span>do4<\/span>();<\/span> --><\/span> X<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u9019\u662f\u4e00\u500b\u7de8\u8b6f\u932f\u8aa4\u3002\u539f\u56e0\u662f\u56e0\u70bado3()\u8fd4\u56de\u4e86A\uff0c\u800cA\u4e2d\u6c92\u6709\u5b9a\u7fa9do4()\u3002\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u6240\u8b02\u7684\u6a21\u64ec\u81ea\u985e\u578b\uff08simulated self-type\uff09\u7684\u7fd2\u6163\u7528\u6cd5\uff08\u53c3\u8003Effective Java\uff09\u3002\u5728Effective Java\u4e2d\uff0c\u4ee5Builder\u6a21\u5f0f\u70ba\u4f8b\uff0c\u4ecb\u7d39\u4e86\u62bd\u8c61\u5c0d\u8c61\u3001\u62bd\u8c61Builder\u4ee5\u53ca\u7e7c\u627f\u5b83\u5011\u7684\u5177\u9ad4\u5c0d\u8c61\u548c\u5177\u9ad4Builder\u3002\u5728\u9019\u88e1\uff0c\u6211\u5011\u5c07\u4f7f\u7528\u63a5\u53e3\u4f86\u793a\u7bc4\u3002<\/p>\n
                public<\/span> interface<\/span> IBase<\/span><<\/span>T<\/span> extends<\/span> IBase<\/span><<\/span>T<\/span>>><\/span> {<\/span>\t\r\n\tpublic<\/span> T<\/span> firstName<\/span>();<\/span>\t\r\n\tpublic<\/span> T<\/span> lastName<\/span>();<\/span>\t\r\n\tpublic<\/span> T<\/span> setName<\/span>(<\/span>String<\/span> first<\/span>,<\/span> String<\/span> last<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u5728\u63a5\u53e3\u5b9a\u4e49\u4e2d\uff0cIBase> \u662f self-type \u7684\u90e8\u5206\u3002\u8fd9\u4e2a\u5b9a\u4e49\u9650\u5236\u4e86 T \u7684\u7c7b\u578b\u3002
                \n\u5177\u4f53\u6765\u8bf4\uff0cT \u5fc5\u987b\u7ee7\u627f\uff08\u6216\u5b9e\u73b0\uff09IBase\uff0c\u5e76\u4e14\u5176\u7c7b\u578b\u53c2\u6570\u4e5f\u5fc5\u987b\u4e3a T\u3002
                \n\u867d\u7136\u6709\u70b9\u4ee4\u4eba\u56f0\u60d1\uff0c\u4f46\u5177\u4f53\u5b9a\u4e49\u5982\u4e0b\uff1a<\/p>\n
                public<\/span> class<\/span> Something<\/span> implements<\/span> IBase<\/span><<\/span>Something<\/span>><\/span> {<\/span>\r\n   ......<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u5f53\u6211\u4eec\u5c06Something\u5e94\u7528\u4e8e>\u7684T\u65f6\uff0c\u786e\u5b9e\u53ef\u4ee5\u5f97\u5230Something\u7684\u7c7b\u5b9a\u4e49\u3002\u7136\u800c\uff0c\u8fd9\u4e2a\u7c7b\u6ca1\u6709\u4efb\u4f55\u610f\u4e49\u3002\u56e0\u4e3aT\u5df2\u7ecf\u88ab\u786e\u5b9a\u4e3aSomething\uff0c\u6240\u4ee5\u65e0\u6cd5\u5b9e\u73b0\u539f\u672c\u76ee\u7684\u4e2d\u7684\u7ee7\u627f\u5173\u7cfb\u7684\u65b9\u6cd5\u94fe\u3002\u56e0\u6b64\uff0c\u5728\u5177\u4f53\u7c7b\u4e4b\u524d\uff0c\u6211\u4eec\u5f15\u5165\u4e86\u62bd\u8c61\u7c7b\u3002<\/p>\n
                @SuppressWarnings<\/span>(<\/span>\"unchecked\"<\/span>)<\/span>\r\npublic<\/span> abstract<\/span> class<\/span> Base<\/span><<\/span>T<\/span> extends<\/span> IBase<\/span><<\/span>T<\/span>>><\/span> implements<\/span> IBase<\/span><<\/span>T<\/span>><\/span> {<\/span>\r\n\tprotected<\/span> String<\/span> firstName<\/span>;<\/span>\r\n\tprotected<\/span> String<\/span> lastName<\/span>;<\/span>\r\n\t\r\n\tpublic<\/span> T<\/span> setName<\/span>(<\/span>String<\/span> first<\/span>,<\/span> String<\/span> last<\/span>)<\/span> {<\/span>\r\n\t\tthis<\/span>.<\/span>firstName<\/span> =<\/span> first<\/span>;<\/span>\r\n\t\tthis<\/span>.<\/span>lastName<\/span> =<\/span> last<\/span>;<\/span>\r\n\t\treturn<\/span> (<\/span>T<\/span>)<\/span>this<\/span>;<\/span>\/\/\u7d76\u5bfe\u306b\u6210\u529f\u3059\u308b\uff0eT\u306fIBase\u3092\u7d99\u627f\u307e\u305f\u306f\u5b9f\u88c5\u3059\u308b\uff0ethis(Base)\u306fIBase\u3092\u5b9f\u88c5\u3059\u308b\uff0e\u3088\u3063\u3066\u7d76\u5bfe\u6210\u529f\u3059\u308b\uff0e<\/span>\r\n\t\t               \/\/ \u305f\u3060\u3057\uff0c\u30b3\u30f3\u30d1\u30a4\u30e9\u30fc\u306e\u578b\u691c\u67fb\u3067\u306f\u30c1\u30a7\u30c3\u30af\u3067\u304d\u306a\u3044<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> T<\/span> firstName<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>firstName<\/span>);<\/span>\r\n\t\treturn<\/span> (<\/span>T<\/span>)<\/span>this<\/span>;<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> T<\/span> lastName<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>lastName<\/span>);<\/span>\r\n\t\treturn<\/span> (<\/span>T<\/span>)<\/span>this<\/span>;<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u56e0\u4e3aBase\u5b9e\u73b0\u4e86IBase\uff0c\u6240\u4ee5\u5982\u679c\u76f4\u63a5\u8fdb\u884c\u7c7b\u5b9a\u4e49\u7684\u8bdd\uff0c<\/p>\n
                class<\/span> Base<\/span><<\/span>T<\/span>><\/span> implements<\/span> IBase<\/span><<\/span>T<\/span>><\/span>\r\n<\/code><\/pre>\n
                \u5373\u4f7f\u8fd9\u6837\u5199\uff0c\u4f7f\u7528\u7c7b\u578b\u53c2\u6570T\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002\u56e0\u4e3aIBase\u7684\u7c7b\u578b\u53c2\u6570T\u88ab\u5b9a\u4e49\u4e3aT extends IBase\uff0c\u6240\u4ee5Base\u7684\u7c7b\u578b\u53c2\u6570T\u4e5f\u9700\u8981\u76f8\u540c\u7684\u5b9a\u4e49\u3002
                \n\u5b9e\u9645\u4e0a\uff0c\u5373\u4f7f\u5199\u6210Base\u7684\u5f62\u5f0f\uff0c”T\u662fBase\u7684\u4e0a\u9650\uff0c\u5e76\u5c06T\u5e94\u7528\u4e8eIBase”\u4ee5\u6ee1\u8db3IBase\u7684T extends IBase\u7684\u7ea6\u675f(T\u662fBase\u7684\u5b9a\u4e49(implements IBase))\uff0c\u7f16\u8bd1\u4e5f\u53ef\u4ee5\u901a\u8fc7\u3002\u4f46\u662f\uff0c\u8fd9\u4f1a\u5f15\u8d77\u6269\u5c55\u6027\u7684\u95ee\u9898(\u5982\u4e0b\u6240\u8ff0)\u3002<\/p>\n
                \u4e0b\u4e00\u6b65\uff0c\u4ee3\u7801\u7684\u91cd\u70b9\u662f\u5728\u4e8ereturn (T)this;\u8fd9\u90e8\u5206\uff0c\u5728\u6ce8\u91ca\u4e2d\u6307\u51fa\uff0c\u8fd9\u4e2a\u5f3a\u5236\u8f6c\u578b\u662f\u7edd\u5bf9\u6210\u529f\u7684\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u4f7f\u7528@SuppressWarnings(“unchecked”)\u6765\u5ffd\u7565\u7f16\u8bd1\u5668\u7684\u8b66\u544a\u3002\u901a\u8fc7\u8fd9\u79cd\u5b9e\u73b0\u65b9\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u8fd0\u884c\u65f6\u5c06\u7c7b\u578b\u5b89\u5168\u5730\u5411\u4e0b\u8f6c\u6362\u4e3a\u6307\u5b9a\u7684\u7c7b\u3002<\/p>\n
                \u6700\u7ec8\uff0c\u6211\u4eec\u5b9e\u73b0\u5177\u8c61\u7c7b\u3002<\/p>\n
                public<\/span> class<\/span> Concrete<\/span> extends<\/span> Base<\/span><<\/span>Concrete<\/span>><\/span> {<\/span>\r\n    public<\/span> Concrete<\/span> company<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Apple\"<\/span>);<\/span>\r\n\t\treturn<\/span> this<\/span>;<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> ...<\/span>args<\/span>)<\/span> {<\/span>\r\n\t\tConcrete<\/span> cobj<\/span> =<\/span> new<\/span> Concrete<\/span>();<\/span>\t\t\r\n\t\tcobj<\/span>.<\/span>setName<\/span>(<\/span>\"Jobs\"<\/span>,<\/span> \"Steve\"<\/span>);<\/span>\r\n\t\tObject<\/span> o<\/span> =<\/span> cobj<\/span>.<\/span>firstName<\/span>().<\/span>lastName<\/span>().<\/span>company<\/span>();<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>o<\/span>.<\/span>getClass<\/span>().<\/span>getName<\/span>());<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u5982\u679c\u6267\u884c\u8fd9\u4e2a\uff0c\u4f60\u4f1a\u5f97\u5230\u4ee5\u4e0b\u7684\u7ed3\u679c\u3002<\/p>\n
                Steve\r\nJobs\r\nApple\r\nConcrete\r\n<\/code><\/pre>\n
                \u5c3d\u7ba1\u6211\u4eec\u5728\u8fd9\u91cc\u5411\u5b50\u7c7b\u6dfb\u52a0\u4e86\u4e00\u4e2a\u65b0\u7684company()\u65b9\u6cd5\uff0c\u4f46\u65b9\u6cd5\u94fe\u6210\u529f\u6267\u884c\u3002
                \n\u4eceo.getClass().getName()\u7684\u7ed3\u679c\u6765\u770b\uff0c\u5b83\u8fd4\u56de\u7684\u662fConcrete\uff0c\u4e5f\u5c31\u662f\u6211\u4eec\u4f20\u9012\u7ed9\u7c7b\u578b\u53c2\u6570\u7684\u7c7b\uff0c\u4e5f\u5c31\u662f\u5b50\u7c7b\u88ab\u8f6c\u6362\u5e76\u8fd4\u56de\u4e86\u3002<\/p>\n
                \u8fd9\u6837\u5e94\u8be5\u53ef\u4ee5\uff0c\u4f46\u662f\u7a0d\u5fae\u6709\u4e9b\u4e0d\u81ea\u7136\u7684\u611f\u89c9\u3002
                \nclass Concrete extends Base\uff0c\u4f46\u662fBase\u7684\u7c7b\u578b\u53c2\u6570\u5b9a\u4e49\u662fBase>\u3002\u5982\u679c\u5c06Concrete\u76f4\u63a5\u5e94\u7528\u5230T\u4e0a\uff0c\u5e94\u8be5\u662fConcrete extends IBase\uff0c\u90a3\u4e48class Concrete extends Base\u5c31\u5bf9\u4e86\u5417\uff1fBase\u5b9e\u73b0\u4e86IBase\uff0c\u5e76\u4e14\u7f16\u8bd1\u4e5f\u901a\u8fc7\u4e86\uff0c\u6240\u4ee5\u80af\u5b9a\u4e0d\u662f\u9519\u8bef\u7684\u3002\u4f46\u662f\u4e3a\u4e86\u8ba9\u5b83\u66f4\u6e05\u6670\u4e00\u4e9b\uff0c\u53ef\u4ee5\u5c06Base\u7684\u5b9a\u4e49\u6539\u4e3a<\/p>\n
                abstract<\/span> class<\/span> Base<\/span><<\/span>T<\/span> extends<\/span> Base<\/span><<\/span>T<\/span>><\/span>\r\n<\/code><\/pre>\n
                \u5982\u679c\u8fd9\u6837\u505a\uff0c\u5c31\u6ca1\u6709\u4efb\u4f55\u95ee\u9898\u4e86\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u5982\u679c\u63a5\u53e3->\u62bd\u8c61\u7c7b->\u5177\u4f53\u7c7b\u4e4b\u95f4\u5177\u6709\u7c7b\u4f3c\u7684\u5173\u7cfb\uff0c\u4f1a\u611f\u89c9\u66f4\u597d\u3002<\/p>\n
                \u597d\u7684\uff0c\u73b0\u5728\u6211\u4eec\u5728\u8fd9\u91cc\u8fdb\u4e00\u6b65\u5f15\u5165\u7ee7\u627fIBase\u7684\u63a5\u53e3\u3002<\/p>\n
                public<\/span> interface<\/span> IConcrete<\/span> extends<\/span> IBase<\/span><<\/span>IConcrete<\/span>><\/span> {<\/span>\t\r\n\tpublic<\/span> String<\/span> greeting<\/span>();<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                IConcrete\u4e5f\u6ee1\u8db3IBase\u6240\u8981\u6c42\u7684\u6cdb\u578b\u53c2\u6570T extends IBase\u3002
                \n\u7136\u540e\uff0c\u6211\u4eec\u7ee7\u627fBase\u5e76\u5b9a\u4e49Concrate2\u6765\u5b9e\u73b0\u8fd9\u4e2aIConcrete\u3002<\/p>\n
                public<\/span> class<\/span> Concrete2<\/span> extends<\/span> Base<\/span><<\/span>Concrete2<\/span>><\/span> implements<\/span> IConcrete<\/span> {<\/span>\t\/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n\t@Override<\/span>\r\n\tpublic<\/span> String<\/span> greeting<\/span>()<\/span> {<\/span>\t\r\n\t\treturn<\/span> \"SayHello\"<\/span>;<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                Concrete2\u3092\u5b9f\u88c5\u3057\u3088\u3046\u3068\u3059\u308b\u3068IBase\u3068IBase\u3068\u3044\u3046\u4e8c\u3064\u306e\u7570\u306a\u308b\u5f15\u6570\u3092\u6301\u3064\u540c\u3058\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9IBase\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044\u3068\u3044\u3046\u30a8\u30e9\u30fc\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002\u3053\u308c\u306f\u3001Base\u3068\u3044\u3046\u3053\u3068\u306f\u3001<\/p>\n
                abstract<\/span> class<\/span> Base<\/span><<\/span>Concrete2<\/span> extends<\/span> IBase<\/span><<\/span>Concrete2<\/span>>><\/span> implements<\/span> IBase<\/span><<\/span>Concrete2<\/span>><\/span>\r\n<\/code><\/pre>\n
                \u6211\u6240\u6307\u7684\u662f<\/p>\n
                interface<\/span> IConcrete<\/span> extends<\/span> IBase<\/span><<\/span>IConcrete<\/span>><\/span>\r\n<\/code><\/pre>\n
                \u4f3c\u4e4e\u4f1a\u5f15\u53d1\u51b2\u7a81\u7684\u610f\u601d\u3002<\/p>\n
                \u6240\u4ee5\uff0c\u7b54\u6848\u662f<\/p>\n
                public<\/span> class<\/span> Concrete2<\/span> extends<\/span> Base<\/span><<\/span>IConcrete<\/span>><\/span> implements<\/span> IConcrete<\/span> {<\/span>\r\n\t@Override<\/span>\r\n\tpublic<\/span> String<\/span> greeting<\/span>()<\/span> {<\/span>\t\r\n\t\treturn<\/span> \"SayHello\"<\/span>;<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u53ea\u9700\u5c06Base\u8fd9\u6837\u8bbe\u5b9a\u5c31\u53ef\u4ee5\u4e86\u3002\u7a0d\u5fae\u6709\u4e9b\u56f0\u60d1\u5462\u2026\u2026<\/p>\n
                \u6765\u70b9\u989d\u5916\u7684<\/h5>\n
                \u5728\u5f15\u5165\u4e86\u63a5\u53e3\u7684\u524d\u63d0\u4e0b\uff0c\u901a\u8fc7\u4fee\u6539\u57fa\u7c7b\u5b9a\u4e49\u4e3a(T extends Base)\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n
                public<\/span> abstract<\/span> class<\/span> Base<\/span><<\/span>T<\/span> extends<\/span> Base<\/span><<\/span>T<\/span>>><\/span> implements<\/span> IBase<\/span><<\/span>T<\/span>><\/span> {<\/span>\r\n<\/code><\/pre>\n
                \u9019\u6b21\u88ab\u8aaa”Concrete\u4e0d\u662f\u4e00\u500b\u6709\u6548\u7684\u66ff\u4ee3\u53c3\u6578\uff0c\u9650\u5b9a\u70baT extends Base”\u3002\u56e0\u70baIConcrete\u662f”IConcrete extends IBase”\u554a\u3002<\/p>\n
                \u56e0\u6b64\uff0c\u5982\u679c\u5177\u8c61\u7c7b\u4e0d\u5b9e\u73b0\u5176\u4ed6\u63a5\u53e3\uff0c\u90a3\u4e48\u4f7f\u7528`Base`\u53ef\u80fd\u66f4\u6e05\u6670\u6613\u61c2\uff0c\u5982\u679c\u9700\u8981\u5b9e\u73b0\u7684\u8bdd\uff0c\u53ef\u80fd\u6700\u597d\u50cf\u672c\u6b21\u7684\u6b63\u786e\u793a\u4f8b\u4e00\u6837\u8fdb\u884c\u3002<\/p>\n
                \n
                \u4f7f\u7528\u4e0a\u9650\u548c\u4e0b\u9650\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\u548c\u7406\u5ff5<\/h3>\n
                \u6cdb\u578b\u4e2d\u7684\u4e0a\u9650\u662f\u4ec0\u4e48\uff1f<\/p>\n
                T<\/span> extends<\/span> Number<\/span>\r\n<\/code><\/pre>\n
                \u901a\u8fc7\u4f7f\u7528extends\u6765\u786e\u5b9a\u7c7b\u578b\u53c2\u6570\u7684\u4e0a\u9650\uff08\u5373\u7c7b\u5c42\u6b21\u7ed3\u6784\u7684\u4e0a\u754c\uff09\uff0c\u53ef\u4ee5\u5b9e\u73b0\u50cf…\u4e00\u6837\u3002<\/p>\n
                \u4e0b\u9650\u7684\u610f\u601d\u662f\u6307<\/p>\n
                T<\/span> super<\/span> Integer<\/span>\r\n<\/code><\/pre>\n
                \u4f7f\u7528super\u5173\u952e\u5b57\u6765\u786e\u5b9a\u7c7b\u578b\u53c2\u6570\u7684\u4e0b\u9650\uff08\u5373\u7c7b\u5c42\u6b21\u7ed3\u6784\u7684\u8fb9\u754c\uff09\u3002<\/p>\n
                \u76f4\u89c9\u5730\u601d\u8003\uff0c\u5bf9\u4e8e\u4e0a\u9650\u6709\u4e9b\u660e\u767d(\u56e0\u4e3a\u6211\u4e60\u60ef\u4e86\u7c7b\u7684\u7ee7\u627f)\uff0c\u4f46\u4e0b\u9650\u7684\u5b58\u5728\u610f\u4e49\u4e0d\u592a\u5bb9\u6613\u7406\u89e3\u3002
                \n\u9996\u5148\uff0c\u6211\u4eec\u4ece\u5bb9\u6613\u7406\u89e3\u7684\u4e0a\u9650\u754c\u9650\u5f00\u59cb\u601d\u8003\u3002<\/p>\n
                \u4e0a\u9650\u5883\u754c\uff08\u62d3\u5c55\uff09<\/h4>\n
                \u5728\u8fd9\u91cc\uff0c\u6211\u5c06\u91cd\u65b0\u5217\u51fa\u65e9\u5148\u5df2\u7ecf\u63d0\u5230\u7684\u4e00\u7ec4\u7c7b\u3002<\/p>\n
                public<\/span> class<\/span> Human<\/span> {<\/span>\r\n\tpublic<\/span> void<\/span> hello<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello Human\"<\/span>);<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\nclass<\/span> Man<\/span> extends<\/span> Human<\/span> {<\/span>\r\n\t@Override<\/span>\r\n\tpublic<\/span> void<\/span> hello<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello Man\"<\/span>);<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\nclass<\/span> Woman<\/span> extends<\/span> Human<\/span> {<\/span>\r\n\t@Override<\/span>\r\n\tpublic<\/span> void<\/span> hello<\/span>()<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello Woman\"<\/span>);<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u4e0b\u4e00\u4e2a\u662f\u5305\u542b\u8fd9\u4e9b\u7684\u7c7b\u3002<\/p>\n
                public<\/span> class<\/span> GenContainer<\/span><<\/span>T<\/span> extends<\/span> Human<\/span>><\/span> {<\/span>\r\n\tprivate<\/span> T<\/span> t<\/span>;<\/span>\t\r\n\tpublic<\/span> GenContainer<\/span>(<\/span>T<\/span> t<\/span>)<\/span> {<\/span>\r\n\t\tthis<\/span>.<\/span>t<\/span> =<\/span> t<\/span>;<\/span>\r\n\t}<\/span>\r\n\r\n    public<\/span> void<\/span> add<\/span>(<\/span>T<\/span> t<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>t<\/span> =<\/span> t<\/span>;<\/span>\r\n    }<\/span>\r\n\t\r\n\tpublic<\/span> T<\/span> get<\/span>()<\/span> {<\/span>\r\n\t\tt<\/span>.<\/span>hello<\/span>();<\/span> ---(<\/span>1<\/span>)<\/span>\r\n\t\treturn<\/span> t<\/span>;<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u5982\u679c\u4e0d\u8bbe\u5b9a\u4e0a\u9650\uff0cT\u7c7b\u578b\u5c06\u662f\u4e0d\u786e\u5b9a\u7684\uff0c\u56e0\u6b64\u65e0\u6cd5\u5bf9t\u8c03\u7528\u65b9\u6cd5\uff08\u7136\u800c\uff0c\u7531\u4e8e\u4efb\u4f55\u7c7b\u578b\u90fd\u7ee7\u627f\u81eaObject\uff0c\u6240\u4ee5\u53ef\u4ee5\u8c03\u7528Object\u4e2d\u5b9a\u4e49\u7684\u65b9\u6cd5\uff0c\u4f46\u6ca1\u6709\u592a\u591a\u5b9e\u9645\u610f\u4e49\uff09\u3002 \u5728 \u8fd9\u91cc\uff0c\u6211\u4eec\u5173\u6ce8(1)\uff0c\u8c03\u7528\u4e86’hello’\u3002\u4e4b\u6240\u4ee5\u53ef\u4ee5\u8fd9\u6837\u505a\uff0c\u662f\u56e0\u4e3a\u9650\u5b9a\u4e86\u4e0a\u9650T extends Human\uff0c\u786e\u4fdd\u4e86T\u662f”\u81f3\u5c11\u662fHuman”\u7684\u5b50\u7c7b\u3002\u7136\u800c\uff0c\u5982\u679c\u53ea\u662f\u8fdb\u884c\u8fd9\u79cd\u7528\u6cd5\uff0c\u666e\u901a\u7684\u7ee7\u627f\u5c31\u8db3\u591f\u4e86\uff0c\u4e0d\u9700\u8981\u7c7b\u578b\u53c2\u6570\u7b49\uff08\u6839\u636e\u524d\u9762\u7684\u8ba8\u8bba\uff09\u3002<\/p>\n
                \u8bf7\u6ce8\u610f\uff0c\u7531\u4e8e\u8ba1\u7b97\u673a\u7ffb\u8bd1\u7684\u5c40\u9650\u6027\uff0c\u6240\u63d0\u4f9b\u7684\u7ffb\u8bd1\u53ef\u80fd\u5e76\u975e\u5b8c\u5168\u51c6\u786e\u6216\u7b26\u5408\u67d0\u4e9b\u6587\u5316\/\u8bed\u8a00\u4e60\u60ef\u3002<\/p>\n
                \u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u5f15\u5165\u7528\u6237\u3002<\/p>\n
                public<\/span> class<\/span> User<\/span><<\/span>T<\/span> extends<\/span> Human<\/span>><\/span> {<\/span>\r\n\t\r\n\tprotected<\/span> T<\/span> t<\/span>;<\/span>\r\n\t\r\n\tpublic<\/span> void<\/span> strictUsebygen<\/span>(<\/span>GenContainer<\/span><<\/span>T<\/span>><\/span> gencontainer<\/span>)<\/span> {<\/span>   -----<\/span> (<\/span>2<\/span>)<\/span>\r\n\t\tt<\/span> =<\/span> gencontainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t\tt<\/span>.<\/span>hello<\/span>();<\/span>                                               -----<\/span> (<\/span>1<\/span>)<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> void<\/span> relaxUsebygen<\/span>(<\/span>GenContainer<\/span><?<\/span> extends<\/span> T<\/span>><\/span> genContainer<\/span>)<\/span> {<\/span> --<\/span> (<\/span>3<\/span>)<\/span>\r\n\t\tt<\/span> =<\/span> genContainer<\/span>.<\/span>get<\/span>();<\/span>\r\n\t\tt<\/span>.<\/span>hello<\/span>();<\/span>                                               -----<\/span> (<\/span>1<\/span>)<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> ...<\/span>args<\/span>)<\/span> {<\/span>\r\n\t\tHuman<\/span> human<\/span> =<\/span> new<\/span> Human<\/span>();<\/span>\r\n\t\tMan<\/span> man<\/span> =<\/span> new<\/span> Man<\/span>();<\/span>\r\n\t\tWoman<\/span> woman<\/span> =<\/span> new<\/span> Woman<\/span>();<\/span>\r\n\t\tHouse<\/span> house<\/span> =<\/span> new<\/span> House<\/span>();<\/span>\r\n\t\tGenContainer<\/span><<\/span>Human<\/span>><\/span> humanContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>human<\/span>);<\/span>\r\n\t\tGenContainer<\/span><<\/span>Man<\/span>><\/span>   manContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>man<\/span>);<\/span>\r\n\t\tGenContainer<\/span><<\/span>Woman<\/span>><\/span> womanContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>woman<\/span>);<\/span>\r\n\t\t\r\n\t\tUser<\/span><<\/span>Human<\/span>><\/span> user<\/span> =<\/span> new<\/span> User<\/span><>();<\/span>     \r\n\t\tuser<\/span>.<\/span>strictUsebygen<\/span>(<\/span>humanContainer<\/span>);<\/span> ---<\/span> (<\/span>4<\/span>)<\/span>\r\n\t\t\/\/user.strictUsebygen(manContainer); \/\/ compile error -- (5)<\/span>\r\n\t\tuser<\/span>.<\/span>relaxUsebygen<\/span>(<\/span>manContainer<\/span>);<\/span>    ---<\/span> (<\/span>6<\/span>)<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                \u7528\u6237\uff0c\u7531\u4e8e\u6211\u4eec\u5c06\u4e0a\u9650\u5b9a\u4e49\u4e3aHuman\uff0c\u6240\u4ee5\u53ef\u4ee5\u50cf\uff081\uff09\u90a3\u6837\u8c03\u7528hello\u3002\u7136\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u50cf\uff084\uff09\u90a3\u6837\u5728User\u548cGenContainer\u4e4b\u95f4\u4f20\u9012Human\u8fdb\u884c\u5904\u7406\u3002\u4e3a\u4e86\u8fdb\u884c\u8fd9\u79cd\u5904\u7406\uff0c\u4e0d\u4ec5\u4ec5\u9700\u8981\u7ee7\u627f\uff0c\u8fd8\u9700\u8981\u7c7b\u578b\u53c2\u6570\u3002\u800c\u5728\uff084\uff09\u4e2d\uff0c\u6211\u4eec\u5c06\u5305\u542bHuman\u7684GenContainer\u4f5c\u4e3a\u53c2\u6570\u8c03\u7528\u65b9\u6cd5\uff0c\u5904\u7406\u6210\u529f\u3002\u901a\u8fc7\u786e\u5b9a\u4e0a\u9650\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9\u7c7b\u578b\u53c2\u6570\u7684\u5bf9\u8c61\u6267\u884c\u67d0\u4e9b\u64cd\u4f5c\uff08\u4f8b\u5982\u65b9\u6cd5\u8c03\u7528\uff09\uff0c\u8fd9\u5c31\u662f\u4e0a\u9650\u7684\u4f18\u70b9\u3002\u53e6\u4e00\u65b9\u9762\uff0c\uff085\uff09\u5c1d\u8bd5\u4f7f\u7528\u5305\u542b\u7ee7\u627f\u81eaHuman\u7684Man\u7684GenContainer\u4f5c\u4e3a\u53c2\u6570\u8c03\u7528\u65b9\u6cd5\u65f6\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002\u8fd9\u662f\u56e0\u4e3a\u6cdb\u578b\u662f\u4e0d\u53d8\u7684\u3002\u51fa\u73b0\u5728\u8fd9\u91cc\u7684\u662f\u901a\u914d\u7b26\uff08\uff1f\uff09\u3002\u4ece\u4f7f\u7528\u8005\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u201cMan\u7ee7\u627f\u4e86Human\uff0c\u6240\u4ee5\u8c03\u7528hello\u4e00\u5b9a\u4f1a\u6210\u529f\u201d\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5c06GenContainer\u6240\u5305\u542b\u7684\u5bf9\u8c61\uff0c\u5373T\u7c7b\u578b\u7684\u7ea6\u675f\u653e\u5bbd\u5230\uff083\uff09\u7684? extends T\u3002\u8fd9\u610f\u5473\u7740\uff0c\u201c\u5982\u679c\u53c2\u6570\u662fGenContainer\u6240\u5305\u542b\u7684\u5bf9\u8c61\u662fT\u7c7b\u578b\u6216\u8005\u7ee7\u627fT\u7684\u7c7b\u578b\u201d\uff0c\u6211\u4eec\u5141\u8bb8\u8fd9\u6837\u7684\u53c2\u6570\u3002\u7ed3\u679c\uff0c\uff086\uff09\u7684\u8c03\u7528\u6210\u529f\u4e86\u3002<\/p>\n
                \u5f53\u4e86\u89e3\u5230\u8fd9\u4e2a\u4e0a\u9650\u548c\u901a\u914d\u7b26\u540e\uff0c\u4e3a\u4e86\u589e\u52a0\u7075\u6d3b\u6027\uff0c\u6211\u60f3\u5c1d\u8bd5\u5199\u5f88\u591a\u4e0d\u540c\u7684\u4e1c\u897f\uff0c\u4f46\u8fd9\u6b63\u662f\u9020\u6210\u6df7\u4e71\u7684\u539f\u56e0\u3002
                \n\u6211\u4e3e\u4e2a\u53ef\u80fd\u7684\u9519\u8bef\u4f8b\u5b50\u3002<\/p>\n
                class<\/span> Sample<\/span><?<\/span> extends<\/span> T<\/span>><\/span> {...}<\/span>\r\n<\/code><\/pre>\n
                \u7f16\u8bd1\u65e0\u6cd5\u901a\u8fc7\uff0c\u65e0\u8bba\u5c06T\u7c7b\u578b\u5b9a\u4e49\u4e3aString\u6216\u5176\u4ed6\u5177\u4f53\u7c7b\u90fd\u4e00\u6837\u3002<\/p>\n
                GenContainer<\/span><?<\/span> extends<\/span> Human<\/span>><\/span> container<\/span> =<\/span> new<\/span> GenCongainer<\/span><>(<\/span>human<\/span>);<\/span>\r\n<\/code><\/pre>\n
                \u8fd9\u662f\u6beb\u65e0\u610f\u4e49\u7684\u3002\u60f3\u8981\u4ee5\u8fd9\u79cd\u65b9\u5f0f\u4e66\u5199\u7684\u539f\u56e0\u662f<\/p>\n
                GenContainer<\/span><?<\/span> extends<\/span> Human<\/span>><\/span> container<\/span> =<\/span> new<\/span> GenCongainer<\/span><>(<\/span>human<\/span>);<\/span>\r\ncontainer<\/span>.<\/span>add<\/span>(<\/span>man<\/span>)<\/span> \/\/ \u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n<\/code><\/pre>\n
                \u6211\u8ba4\u4e3a\u662f\u56e0\u4e3a\u6211\u4eec\u5e0c\u671b\u8c03\u7528\u4e00\u4e2a\u4ee5\u7ee7\u627f\u4e86Human\u7c7b\u7684\u7c7b\u4e3a\u53c2\u6570\u7684\u65b9\u6cd5\uff0c\u4f46\u8fd9\u5b9e\u9645\u4e0a\u4ea7\u751f\u4e86\u76f8\u53cd\u7684\u6548\u679c\uff0c\u5bfc\u81f4\u4e86\u7f16\u8bd1\u9519\u8bef\u3002\u5982\u679c\u4ec5\u770b\u8fd9\u6bb5\u4ee3\u7801\uff0c\u6ca1\u6709\u53d1\u751f\u9519\u8bef\uff0c\u4f46\u4e4b\u6240\u4ee5\u8981\u5c06\u5176\u7f16\u8bd1\u9519\u8bef\u662f\u7531\u4e8e\u5176\u539f\u56e0\u8f83\u4e3a\u590d\u6742\uff0c\u5c06\u5728\u540e\u6587\u4e2d\u8bf4\u660e\u3002<\/p>\n
                \u901a\u914d\u7b26\u7684\u76ee\u7684\u4e0d\u662f\u8003\u8651T\u7c7b\u578b\u7684\u7ee7\u627f\u5173\u7cfb\u672c\u8eab\uff0c\u800c\u662f\u4f7f\u5f97\u80fd\u591f\u4e92\u76f8\u8d4b\u503c\u7684\u5305\u542b\u4e86T\u7c7b\u578b\uff08\u5177\u6709\u7ee7\u627f\u5173\u7cfb\uff09\u7684\u5bf9\u8c61\u3002\u56e0\u6b64\uff0c\u5728\u524d\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u5e76\u4e0d\u5e0c\u671b\u5c06Animal\u7684\u5b9e\u4f8b\u548cPerson\u7684\u5b9e\u4f8b\u8d4b\u7ed9list\u53d8\u91cf\uff0c\u800c\u662f\u5e0c\u671b\u5c06\u5b83\u4eec\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9add\u65b9\u6cd5\u3002<\/p>\n
                GenContainer<\/span><<\/span>Human<\/span>><\/span> container<\/span> =<\/span> new<\/span> GenCongainer<\/span><>(<\/span>woman<\/span>);<\/span>\/\/\u30b3\u30f3\u30d1\u30a4\u30ebOK<\/span>\r\ncontainer<\/span>.<\/span>add<\/span>(<\/span>man<\/span>)<\/span> \/\/ \u30b3\u30f3\u30d1\u30a4\u30ebOK<\/span>\r\n<\/code><\/pre>\n
                \u8fd9\u662f\u53ef\u4ee5\u7684\uff0c\u6211\u60f3\u8981\u5b9e\u73b0\u901a\u914d\u7b26\u3002<\/p>\n
                GenContainer<\/span><<\/span>Man<\/span>><\/span> manContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>man<\/span>)<\/span>\r\nGenContainer<\/span><<\/span>Human<\/span>><\/span> humanContainer1<\/span> =<\/span> manContainer<\/span>            \/\/ (1)\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\nGenContainer<\/span><?<\/span> extends<\/span> Human<\/span>><\/span> humanContainer2<\/span> =<\/span> manContainer<\/span>;<\/span> \/\/ (2)\u30b3\u30f3\u30c6\u30ca\u306e\u4ee3\u5165<\/span>\r\n<\/code><\/pre>\n
                \u5728\u8fd9\u4e2a(2)\u4e2d\uff0c\u8003\u8651\u5230\u6240\u5305\u542b\u5bf9\u8c61\u7684\u7ee7\u627f\u5173\u7cfb\uff0c\u5141\u8bb8\u5bf9\u5bb9\u5668\u8fdb\u884c\u8d4b\u503c\u64cd\u4f5c\u3002\u5982\u679c\u662f(1)\uff0c\u5c31\u4f1a\u51fa\u73b0\u7f16\u8bd1\u9519\u8bef\u3002\u7136\u800c\uff0c\u5982\u679c\u662f(2)\uff0c\u5219\u65e0\u6cd5\u8c03\u7528add\u51fd\u6570\uff0c\u6211\u611f\u5230\u975e\u5e38\u6050\u614c\u3002<\/p>\n
                \u6211\u4f1a\u7ed9\u51fa\u4ee3\u7801\u6765\u8bf4\u660e\u5373\u4f7f\u4f60\u7406\u89e3\u4e86\u8fd9\u4e2a\uff0c\u4e5f\u4e0d\u53ef\u4ee5\u8c03\u7528add\u7684\u539f\u56e0\u3002<\/p>\n
                GenContainer<\/span><<\/span>Man<\/span>><\/span> manContainer<\/span> =<\/span> new<\/span> GenContainer<\/span><>(<\/span>man<\/span>)<\/span>\r\nGenContainer<\/span><?<\/span> extends<\/span> Human<\/span>><\/span> humanContainer<\/span> =<\/span> manContainer<\/span>;<\/span> ---(<\/span>1<\/span>)<\/span>\r\nhumanContainer<\/span>.<\/span>add<\/span>(<\/span>woman<\/span>)---(<\/span>2<\/span>)<\/span>\r\n<\/code><\/pre>\n
                \uff081\uff09\u5047\u8bbe\u5141\u8bb8\u5bf9 manContainer \u8fdb\u884c\u8d4b\u503c\uff0c\u5728\uff082\uff09\u5141\u8bb8 woman \u8fdb\u884c\u8d4b\u503c\u3002\u6b64\u65f6\uff0c\u7531\u4e8e humanContainer \u7684\u5b9e\u4f53\u662f manContainer\uff0c\u53ef\u80fd\u5728\u5185\u90e8\u6267\u884c\u7279\u5b9a\u4e8e man \u7684\u5904\u7406\u3002\u5982\u679c\u5141\u8bb8 woman \u7684\u8d4b\u503c\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u8fd0\u884c\u65f6\u9519\u8bef\u3002\u6211\u8ba4\u4e3a\u51fa\u4e8e\u8fd9\u6837\u7684\u539f\u56e0\u624d\u4f1a\u5c06\u5176\u7f16\u8bd1\u4e3a\u9519\u8bef\u3002<\/p>\n
                \u6211\u8ba4\u4e3a\u4ece\u8fd9\u4e2a\u8ba8\u8bba\u4e2d\u53ef\u4ee5\u5f97\u51fa\u4ee5\u4e0b\u5173\u4e8e\u4e0a\u9650\u7684\u6559\u8bad\u3002<\/p>\n
                  \n
                • \n
                    \u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u6307\u5b9a\u3057\u3066\u30af\u30e9\u30b9\u3092\u751f\u6210\u3059\u308b\u3068\u304d\u306b\u306f\uff0c\u578b\u3092\u53b3\u5bc6\u306b\u6c7a\u3081\u3066\u751f\u6210<\/ul>\n<\/li>\n<\/ul>\n
                     <\/p>\n
                      \n
                    • \n
                        \u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u4ed8\u304d\u306e\u30b3\u30f3\u30c6\u30ca\u3092\u53d7\u3051\u53d6\u308b\u30e1\u30bd\u30c3\u30c9\u3067\u306f\uff0c\u30ef\u30a4\u30eb\u30c9\u30ab\u30fc\u30c9\u3092\u4f7f\u7528\u3057\u3066\u578b\u6210\u7d04\u3092\u7de9\u3081\u3066\u53d7\u3051\u53d6\u308b<\/ul>\n<\/li>\n<\/ul>\n
                         <\/p>\n
                          \u30e1\u30bd\u30c3\u30c9\u306e\u4e2d\u3067\u306f\uff0c\u30b3\u30f3\u30c6\u30ca\u306b\u578b\u30d1\u30e9\u30e1\u30fc\u30bf\u578b\u306e\u4f55\u304b\u3092\u5f15\u6570\u306b\u53d6\u308b\u3088\u3046\u306a\u30e1\u30bd\u30c3\u30c9(container.add(t))\u3092\u547c\u3073\u51fa\u3059\u306e\u3067\u306f\u306a\u304f\uff0c\u30b3\u30f3\u30c6\u30ca\u304b\u3089\u5024\u3092\u53d6\u308a\u51fa\u3057\uff0c\u4e0a\u9650\u306e\u578b\u3068\u3057\u3066\u6271\u3063\u3066\u51e6\u7406\u3092\u3059\u308b\uff0e<\/ul>\n
                          \u7528\u6237\u7684relaxUsebygen\uff08GenContainer <? extends T> genContainer\uff09\u6b63\u597d\u7b26\u5408\u8fd9\u79cd\u5f62\u5f0f\u3002<\/p>\n
                          \u4e0b\u9650\u5883\u754c\uff08\u8d85\u7ea7\uff09<\/h4>\n
                          \u4e0b\u9650\u5883\u754c\u548c\u4e0a\u9650\u5883\u754c\u662f\u76f8\u53cd\u7684\uff0c\u53ef\u4ee5\u50cfT\u8d85\u7ea7\u6570\u5b57\u90a3\u6837\u4e66\u5199\uff0c\u4f46\u76f4\u63a5\u7406\u89e3\u7684\u8bdd\uff0c\u5c31\u662f\u5c06Number\u4f5c\u4e3a\u4e0b\u9650\u7684\u7c7b\u578bT\uff0c\u90a3\u662f\u4ec0\u4e48\u5462\uff1f\u662fObject\u5417\uff1f\u5982\u679c\u662f\u8fd9\u6837\u7684\u8bdd\uff0c\u53ea\u662f\u4e00\u4e2a\u666e\u901a\u7684T\u5c31\u53ef\u4ee5\u4e86\uff0c\u6709\u4ec0\u4e48\u503c\u5f97\u9ad8\u5174\u7684\u5462\uff1f\u800c\u4e14\uff0c\uff08\u53ef\u80fd\u662f\u56e0\u4e3a\u6211\u7406\u89e3\u4e0d\u591f\u6df1\u5165\uff09\uff0c\u4e0e\u4e0a\u9650\u76f8\u6bd4\u4f7f\u7528\u7684\u8303\u56f4\u6709\u9650\u3002\u9996\u5148\uff0c<\/p>\n
                          class<\/span> Something<\/span><<\/span>T<\/span> super<\/span> Number<\/span>><\/span> {...}<\/span>\r\n<\/code><\/pre>\n
                          \u8fd9\u6837\u7684\u5b9a\u4e49\u662f\u4e0d\u53ef\u80fd\u7684\u3002\u800c\u4e14\uff0c\u5373\u4f7f\u5047\u8bbe\u8fd9\u662f\u53ef\u80fd\u7684\uff0c<\/p>\n
                          \r\nclass<\/span> Something<\/span><<\/span>T<\/span> super<\/span> Number<\/span>><\/span> {<\/span>\r\n    T<\/span> t<\/span>;<\/span>\r\n    void<\/span> m<\/span>(<\/span>T<\/span> t<\/span>)<\/span> {<\/span>\r\n      \/\/ t....\u4f55\u3092\u304b\u3051\u3068\u3044\u3046\u306e\uff1f<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                          \u867d\u7136\u53ef\u4ee5\u7406\u89e3\u8fd9\u6837\u7684\u60c5\u51b5\uff0c\u5b83\u662fNumber\u7684\u8d85\u7c7b\uff0c\u4f46\u5b83\u4e0d\u662fNumber\uff0c\u4e5f\u4e0d\u77e5\u9053\u5b83\u7684\u8d85\u7c7b\u662f\u4ec0\u4e48\uff0c\u800c\u4e14\u53ea\u80fd\u8c03\u7528Object\u7684\u65b9\u6cd5\u2026\u2026\u6240\u4ee5\u6211\u5e76\u4e0d\u8ba4\u4e3a\u5b83\u6709\u5b58\u5728\u7684\u610f\u4e49\u3002\u4f46\u603b\u5f52\u8fd8\u662f\u6709\u7684\u3002<\/p>\n
                          public<\/span> class<\/span> Human<\/span> {<\/span>\r\n\tprotected<\/span> String<\/span> name<\/span>;<\/span>\r\n\t\r\n\tpublic<\/span> Human<\/span>(<\/span>String<\/span> name<\/span>)<\/span> {<\/span>\r\n\t\tthis<\/span>.<\/span>name<\/span> =<\/span> name<\/span>;<\/span>\r\n\t}<\/span>\t\r\n\tpublic<\/span> String<\/span> getName<\/span>()<\/span> {<\/span>\r\n\t\treturn<\/span> name<\/span>;<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> Man<\/span> extends<\/span> Human<\/span> {<\/span>\t\r\n\tpublic<\/span> Man<\/span>(<\/span>String<\/span> name<\/span>)<\/span> {<\/span>\r\n\t\tsuper<\/span>(<\/span>name<\/span>);<\/span>\r\n\t}<\/span>\t\r\n\tpublic<\/span> String<\/span> getName<\/span>()<\/span> {<\/span>\r\n\t\treturn<\/span> \"Mr. \"<\/span> +<\/span> super<\/span>.<\/span>getName<\/span>();<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> Woman<\/span> extends<\/span> Human<\/span> {<\/span>\r\n\tpublic<\/span> Woman<\/span>(<\/span>String<\/span> name<\/span>)<\/span> {<\/span>\r\n\t\tsuper<\/span>(<\/span>name<\/span>);<\/span>\r\n\t}<\/span>\t\r\n\tpublic<\/span> String<\/span> getName<\/span>()<\/span> {<\/span>\r\n\t\treturn<\/span> \"Ms. \"<\/span> +<\/span> super<\/span>.<\/span>getName<\/span>();<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                          public<\/span> class<\/span> House<\/span> {<\/span>\r\n\tpublic<\/span> int<\/span> getHight<\/span>()<\/span> {<\/span>\r\n\t\treturn<\/span> 10<\/span>;<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                          \u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u5f15\u5165\u6cdb\u578b\u63a5\u53e3\u548c\u5177\u4f53\u7c7b\u7684\u5b9a\u4e49\u3002<\/p>\n
                          public<\/span> interface<\/span> Builder<\/span><<\/span>T<\/span>><\/span> {<\/span>\t\r\n\tpublic<\/span> void<\/span> build<\/span>(<\/span>T<\/span> t<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                          public<\/span> class<\/span> HumanBuilder<\/span> implements<\/span> Builder<\/span><<\/span>Human<\/span>>{<\/span>\t\r\n\tpublic<\/span> void<\/span> build<\/span>(<\/span>Human<\/span> human<\/span>)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"HouseBuilder.build is invoked\"<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Name: \"<\/span> +<\/span> human<\/span>.<\/span>getName<\/span>());<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
                          public<\/span> class<\/span> ManBuilder<\/span> implements<\/span> Builder<\/span><<\/span>Man<\/span>><\/span> {<\/span>\t\r\n\tpublic<\/span> void<\/span> build<\/span>(<\/span>Man<\/span> man<\/span>)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"ManBuilder.build is invoked\"<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Name: \"<\/span> +<\/span> man<\/span>.<\/span>getName<\/span>());<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                          public<\/span> class<\/span> HouseBuilder<\/span> implements<\/span> Builder<\/span><<\/span>House<\/span>>{<\/span>\r\n\t\r\n\tpublic<\/span> void<\/span> build<\/span>(<\/span>House<\/span> house<\/span>)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"HouseBuilder.build is invoked\"<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"height = \"<\/span> +<\/span> house<\/span>.<\/span>getHight<\/span>());<\/span>\t\t\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                          \u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u8003\u8651\u4f7f\u7528Builder\u6a21\u5f0f\uff0c\u5b83\u662f\u4e00\u4e2a\u5177\u6709\u7c7b\u578b\u53c2\u6570\u7684\u7c7b\u3002<\/p>\n
                          public<\/span> class<\/span> GeneralBuilderUser<\/span><<\/span>T<\/span>><\/span> {<\/span>\r\n\t\r\n\tprivate<\/span> T<\/span> t<\/span>;<\/span>\r\n\t\r\n\tpublic<\/span> GeneralBuilderUser<\/span>(<\/span>T<\/span> t<\/span>)<\/span> {<\/span>\r\n\t\tthis<\/span>.<\/span>t<\/span> =<\/span> t<\/span>;<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> void<\/span> strictuse<\/span>(<\/span>Builder<\/span><<\/span>T<\/span>><\/span> builder<\/span>)<\/span> {<\/span>\r\n\t\tbuilder<\/span>.<\/span>build<\/span>(<\/span>t<\/span>);<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> void<\/span> relaxuse<\/span>(<\/span>Builder<\/span><?<\/span> super<\/span> T<\/span>><\/span> builder<\/span>)<\/span> {<\/span>  ---<\/span> (<\/span>1<\/span>)<\/span>\r\n\t\tbuilder<\/span>.<\/span>build<\/span>(<\/span>t<\/span>);<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> ...<\/span>args<\/span>)<\/span> {<\/span>\r\n\t\tGeneralBuilderUser<\/span><<\/span>House<\/span>><\/span> houseBuildUser<\/span> =<\/span> new<\/span> GeneralBuilderUser<\/span><>(<\/span>new<\/span> House<\/span>());<\/span>\r\n\t\tGeneralBuilderUser<\/span><<\/span>Human<\/span>><\/span> humanBuildUser<\/span> =<\/span> new<\/span> GeneralBuilderUser<\/span><>(<\/span>new<\/span> Human<\/span>(<\/span>\"abc\"<\/span>));<\/span> \/\/ Man is also OK<\/span>\r\n\t\tGeneralBuilderUser<\/span><<\/span>Man<\/span>><\/span>   manBuildUser<\/span>   =<\/span> new<\/span> GeneralBuilderUser<\/span><>(<\/span>new<\/span> Man<\/span>(<\/span>\"xyz\"<\/span>));<\/span>   \/\/ Woman and Human are not applicable<\/span>\r\n\t\t\r\n\t\t\r\n\t\tHouseBuilder<\/span> houseBuilder<\/span> =<\/span> new<\/span> HouseBuilder<\/span>();<\/span>\r\n\t\tHumanBuilder<\/span> humanBuilder<\/span> =<\/span> new<\/span> HumanBuilder<\/span>();<\/span>\r\n\t\t\r\n\t\thouseBuildUser<\/span>.<\/span>strictuse<\/span>(<\/span>houseBuilder<\/span>);<\/span>\r\n\t\thumanBuildUser<\/span>.<\/span>strictuse<\/span>(<\/span>humanBuilder<\/span>);<\/span>\r\n\t\t\/\/manBuildUser.strictuse(humanBuilder); \/\/ compile error<\/span>\r\n\t\tmanBuildUser<\/span>.<\/span>relaxuse<\/span>(<\/span>humanBuilder<\/span>);<\/span>    \/\/ compile OK<\/span>\r\n\t\t\r\n\t\t\/\/houseBuildUser.strictuse(humanBuilder); \/\/ compile error<\/span>\r\n\t\t\/\/houseBuildUser.relaxuse(humanBuilder);  \/\/ compile error<\/span>\r\n\t\t\r\n\t}<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                          \u9996\u5148\uff0c\u5728main\u51fd\u6570\u4e2d\u521b\u5efa3\u4e2aGeneralBuilderUser\uff08\u5206\u522b\u6307\u5b9a\u7c7b\u578b\u53c2\u6570\u4e3aHouse\u3001Main\u548cHuman\uff09\uff0c\u7136\u540e\u521b\u5efaHouseBuilder\u548cHumanBuilder\u3002\u7136\u540e\uff0c\u901a\u8fc7\u5c06\u4e24\u4e2aBuilder\u5e94\u7528\u4e8e\u6bcf\u4e2aBuilderUser\u7684\u65b9\u6cd5\u7684\u793a\u4f8b\uff0c\u6211\u4eec\u8003\u8651\u4e0b\u9650\u754c\u9650\u7684\u4f5c\u7528\u3002<\/p>\n
                          houseBuildUser<\/span>.<\/span>strictuse<\/span>(<\/span>houseBuilder<\/span>);<\/span>\r\n<\/code><\/pre>\n
                          \u7531\u4e8eBuilder\u548cBuilderUser\u7684\u7c7b\u578b\u53c2\u6570\u90fd\u662fHouse\uff0c\u56e0\u6b64\u7f16\u8bd1\u53ef\u4ee5\u901a\u8fc7\u3002<\/p>\n
                          humanBuildUser<\/span>.<\/span>strictuse<\/span>(<\/span>humanBuilder<\/span>);<\/span>\r\n<\/code><\/pre>\n
                          \u56e0\u4e3aBuilder\u548cBuilderUser\u7684\u7c7b\u578b\u53c2\u6570\u90fd\u662fHuman\uff0c\u6240\u4ee5\u53ef\u4ee5\u6210\u529f\u7f16\u8bd1\u901a\u8fc7\u3002<\/p>\n
                          manBuildUser<\/span>.<\/span>strictuse<\/span>(<\/span>humanBuilder<\/span>);<\/span> \/\/ compile error<\/span>\r\n<\/code><\/pre>\n
                          BuilderUser\u7684\u7c7b\u578b\u53c2\u6570\u662fMan\uff0cBuilder\u7684\u7c7b\u578b\u53c2\u6570\u662fHuman\uff0c\u7531\u4e8e\u6cdb\u578b\u662f\u4e0d\u53d8(\u534f\u53d8)\u7684\uff0c\u56e0\u6b64\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
                          manBuildUser<\/span>.<\/span>relaxuse<\/span>(<\/span>humanBuilder<\/span>);<\/span>    \/\/ compile OK<\/span>\r\n<\/code><\/pre>\n
                          BuilderUser\u7684\u7c7b\u578b\u53c2\u6570\u662fMan\uff0cBuilder\u7684\u7c7b\u578b\u53c2\u6570\u662fHuman\uff0c\u5c3d\u7ba1\u6cdb\u578b\u662f\u4e0d\u53d8\u7684\uff0c\u4f46\u662f\u7531\u4e8e\u6307\u5b9a\u4e86\u4e0b\u9650(1)\uff0c\u6240\u4ee5\u7f16\u8bd1\u901a\u8fc7\u3002\u7a0d\u540e\u4f1a\u4ed4\u7ec6\u8003\u8651\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n
                          houseBuildUser<\/span>.<\/span>strictuse<\/span>(<\/span>humanBuilder<\/span>);<\/span> \/\/ compile error<\/span>\r\nhouseBuildUser<\/span>.<\/span>relaxuse<\/span>(<\/span>humanBuilder<\/span>);<\/span>  \/\/ compile error<\/span>\r\n<\/code><\/pre>\n
                          \u5728BuilderUser\u548cBuilder\u4e2d\uff0c\u7531\u4e8e\u5c06\u5b8c\u5168\u4e0d\u76f8\u5173\u7684\u7c7bHouse\u548cHuman\u4f5c\u4e3a\u7c7b\u578b\u53c2\u6570\uff0c\u56e0\u6b64\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
                          \u7b2c\u56db\u79cd\u60c5\u51b5\u662f\u4f7f\u7528\u4e0b\u9650\u7684\u60c5\u51b5\u3002\u5728\u8fd9\u91cc\uff0c\u5b58\u5728\u7740Human > Man\u7684\u5173\u7cfb\uff08Human\u662f\u7236\u7c7b\uff09\uff0cMan\u4f5c\u4e3a\u5b50\u7c7b\u4f5c\u4e3aBuilderUser\u7684\u7c7b\u578b\u53c2\u6570\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cManBuilderUser\u7684T\u662fMan\u3002\u53e6\u4e00\u65b9\u9762\uff0cBuilder\u7684\u7c7b\u578b\u53c2\u6570\u662f\u7ed9\u5b9a\u7684\u7236\u7c7bHuman\u4f5c\u4e3a\u7c7b\u578b\u53c2\u6570\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cbuild(T t)\u7684T\u662fHuman\u3002
                          \n\u73b0\u5728\u6211\u4eec\u6765\u770b\u4e00\u4e0b\u65b9\u6cd5\u3002<\/p>\n
                          public<\/span> void<\/span> relaxuse<\/span>(<\/span>Builder<\/span><?<\/span> super<\/span> T<\/span>><\/span> builder<\/span>)<\/span> {<\/span> \r\n\t\tbuilder<\/span>.<\/span>build<\/span>(<\/span>t<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
                          \u4ece\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u53ef\u4ee5\u5f97\u51fa\u4ee5\u4e0b\u7ed3\u8bba\uff1a<\/p>\n
                            \n
                          • \n
                              \u4e0b\u9650\u5883\u754c\u3092\u9069\u7528\u3059\u308b\u30b1\u30fc\u30b9\u306f\u9650\u3089\u308c\u308b\uff0e\u4f8b\u3048\u3070\u30af\u30e9\u30b9\u5b9a\u7fa9\u306b\u306f\u4f7f\u3048\u306a\u3044\uff0e<\/ul>\n<\/li>\n<\/ul>\n
                               <\/p>\n
                                \u4e0b\u9650\u5883\u754c\u3092\u9069\u7528\u3059\u308b\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9(e.g., build)\u3068\uff0c\u305d\u3053\u306b\u4e0e\u3048\u308b\u5f15\u6570(t)\u306e\u578b\u306e\u95a2\u4fc2\u3092\u8003\u3048\uff0c\u4e0b\u9650\u5883\u754c\u3092\u9069\u7528\u3059\u308b\u30af\u30e9\u30b9\u304c\u5f15\u6570\u306e\u89aa\u30af\u30e9\u30b9\u306b\u306a\u3063\u3066\u3044\u308b\u5834\u5408\u306b\u9069\u7528\u3059\u308b\uff0e<\/ul>\n
                                \u6240\u8b02\u7684”PECS”\u89c4\u5219\u6b63\u662f\u6307\u5728\u4f5c\u4e3aConsumer\u65f6\u8981\u4f7f\u7528super\uff0c\u4f46\u662f\u5f53\u63d0\u5230Consumer\u65f6\uff0c\u6211\u5e76\u6ca1\u6709\u5b8c\u5168\u7406\u89e3\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u6211\u89c9\u5f97\u4ece\u65b9\u6cd5\u7684\u8c03\u7528\u5173\u7cfb\u6765\u8003\u8651\u4f1a\u66f4\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n
                                \u8865\u5145\u4e00\u70b9\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u7684T\u662f\u7531BuilderUser\u4e2d\u7684Man\u7ed9\u5b9a\u7684\uff0c\u800c\u4e0d\u662f\u6307builder\u672c\u8eab\u3002<\/p>\n
                                public<\/span> class<\/span> HumanBuilder<\/span> implements<\/span> Builder<\/span><<\/span>Human<\/span>><\/span>\r\n<\/code><\/pre>\n
                                \u5728\u7c7b\u7684\u5b9a\u4e49\u4e2d\u7ed9\u5b9a\u4e86\u4e00\u4e2a\u53eb\u505aHuman\u7684\u5bf9\u8c61\u3002\u5f53\u51fa\u73b0T\u6216t\u7684\u65f6\u5019\uff0c\u4f1a\u975e\u5e38\u4ee4\u4eba\u56f0\u60d1\u3002<\/p>\n
                                \u6700\u7ec8\u7684\u76ee\u6807\u662f\uff0c\u5728\u4e24\u4e2a\u6216\u66f4\u591a\u7c7b\u578b\u53c2\u6570\u7684\u7c7b\u4e4b\u95f4\u8fdb\u884c\u5bf9\u8c61\u4ea4\u4e92\u65f6\uff0c\u4f7f\u7528\u4e0b\u9650\u8fb9\u754c\u7528\u4e8e\u653e\u5bbd\u9650\u5236\u3002<\/p>\n
                                \u6b64\u5916\uff0c\u8fd8\u6709\u5e38\u7528\u4e8e\u63cf\u8ff0\u4e0b\u9650\u8fb9\u754c\u7684Comparable\u63a5\u53e3\uff0c\u4f46\u5173\u4e8e\u5b83\u7684\u8be6\u7ec6\u89e3\u91ca\u53ef\u80fd\u4f1a\u5728\u4ee5\u540e\u7684\u65f6\u95f4\u5199\u51fa\u6765\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
                                \u5927\u7eb2 Java\u5f15\u5165\u4e86\u6cdb\u578b\uff0c\u6dfb\u52a0\u4e86\u7c7b\u578b\u53c2\u6570\uff0c\u53c2\u6570\u8fb9\u754c\uff0c\u534f\u53d8\uff0c\u9006\u53d8\uff0c\u4e0d\u53d8\uff0c\u901a\u914d\u7b26\u7b49\u7b49\u5404\u79cd\u8bed\u6cd5\u548c\u529f\u80fd\u3002\u5982\u679c\u641c\u7d22\u4e00\u4e0b\uff0c […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31420","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u91cd\u65b0\u5ba1\u89c6Java\u7684\u6cdb\u578b\u529f\u80fd - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u91cd\u65b0\u5ba1\u89c6java\u7684\u6cdb\u578b\u529f\u80fd\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u91cd\u65b0\u5ba1\u89c6Java\u7684\u6cdb\u578b\u529f\u80fd\" \/>\n<meta property=\"og:description\" content=\"\u5927\u7eb2 Java\u5f15\u5165\u4e86\u6cdb\u578b\uff0c\u6dfb\u52a0\u4e86\u7c7b\u578b\u53c2\u6570\uff0c\u53c2\u6570\u8fb9\u754c\uff0c\u534f\u53d8\uff0c\u9006\u53d8\uff0c\u4e0d\u53d8\uff0c\u901a\u914d\u7b26\u7b49\u7b49\u5404\u79cd\u8bed\u6cd5\u548c\u529f\u80fd\u3002\u5982\u679c\u641c\u7d22\u4e00\u4e0b\uff0c […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u91cd\u65b0\u5ba1\u89c6java\u7684\u6cdb\u578b\u529f\u80fd\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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