{"id":134613,"date":"2024-04-28T11:58:58","date_gmt":"2024-04-28T03:58:58","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/134613.html"},"modified":"2024-04-28T11:59:02","modified_gmt":"2024-04-28T03:59:02","slug":"java%e7%9a%84%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e6%9c%89%e5%93%aa%e4%ba%9b","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/134613.html","title":{"rendered":"java\u7684\u6570\u636e\u7c7b\u578b\u6709\u54ea\u4e9b"},"content":{"rendered":"

\"java\u7684\u6570\u636e\u7c7b\u578b\u6709\u54ea\u4e9b\"<\/p>\n

Java\u7684\u6570\u636e\u7c7b\u578b\u4e3b\u8981\u5206\u4e3a\u4e24\u5927\u7c7b\uff1a\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/strong>\u548c\u5f15\u7528\u6570\u636e\u7c7b\u578b<\/strong>\u3002\u57fa\u672c\u6570\u636e\u7c7b\u578b\u5305\u62ec\u5b57\u8282\u578b\uff08byte\uff09\u3001\u77ed\u6574\u578b\uff08short\uff09\u3001\u6574\u578b\uff08int\uff09\u3001\u957f\u6574\u578b\uff08long\uff09\u3001\u6d6e\u70b9\u578b\uff08float\uff09\u3001\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b\uff08double\uff09\u3001\u5b57\u7b26\u578b\uff08char\uff09\u548c<\/strong>\u5e03\u5c14\u578b\uff08boolean\uff09<\/strong>\u3002\u5f15\u7528\u6570\u636e\u7c7b\u578b\u5219\u5305\u62ec\u7c7b\uff08class\uff09\u3001\u63a5\u53e3\uff08interface\uff09\u548c<\/strong>\u6570\u7ec4\uff08array\uff09<\/strong>\u3002\u5728\u8fd9\u4e9b\u6570\u636e\u7c7b\u578b\u4e2d\uff0c\u57fa\u672c\u6570\u636e\u7c7b\u578b\u662fJava\u8bed\u8a00\u7684\u57fa\u77f3<\/strong>\uff0c\u5b83\u4eec\u5360\u7528\u56fa\u5b9a\u7684\u5185\u5b58\u5927\u5c0f\uff0c\u5e76\u4e14\u6bcf\u79cd\u7c7b\u578b\u90fd\u6709\u5176\u660e\u786e\u7684\u4f7f\u7528\u8303\u56f4\u548c\u9ed8\u8ba4\u503c\uff0c\u8fd9\u6837\u53ef\u4ee5\u63d0\u9ad8\u8fd0\u884c\u6548\u7387\u5e76\u964d\u4f4e\u5185\u5b58\u4f7f\u7528\u3002<\/p>\n<\/p>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u91cd\u70b9\u5c55\u5f00\u8ba8\u8bba\u57fa\u672c\u6570\u636e\u7c7b\u578b\u4e2d\u7684\u4e00\u4e2a\u4ee3\u8868\u2014\u2014\u6574\u578b\uff08int\uff09<\/strong>\u3002\u6574\u578b\u662fJava\u4e2d\u4f7f\u7528\u9891\u7387\u975e\u5e38\u9ad8\u7684\u6570\u636e\u7c7b\u578b\u4e4b\u4e00\uff0c\u5b83\u7528\u4e8e\u8868\u793a\u6ca1\u6709\u5c0f\u6570\u90e8\u5206\u7684\u6570\u503c\u3002\u572832\u4f4dJava\u865a\u62df\u673a\u4e2d\uff0c\u6574\u578b\u5360\u75284\u4e2a\u5b57\u8282\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u53ef\u4ee5\u8868\u793a\u7684\u6570\u503c\u8303\u56f4\u662f\u4ece-2^31\u52302^31-1\u3002\u8fd9\u4e2a\u8303\u56f4\u8db3\u591f\u5e94\u5bf9\u5927\u591a\u6570\u65e5\u5e38\u7684\u7f16\u7a0b\u9700\u6c42\u3002\u5f53\u9700\u8981\u5904\u7406\u7684\u6570\u503c\u8d85\u51fa\u8fd9\u4e2a\u8303\u56f4\u65f6\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u957f\u6574\u578b\uff08long\uff09\u3002\u6574\u578b\u7684\u9ed8\u8ba4\u503c\u662f0\uff0c\u8fd9\u610f\u5473\u7740\u5982\u679c\u4f60\u58f0\u660e\u4e86\u4e00\u4e2a\u6574\u578b\u53d8\u91cf\u4f46\u6ca1\u6709\u521d\u59cb\u5316\uff0c\u5b83\u7684\u503c\u5c31\u4f1a\u662f0\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/h3>\n<\/p>\n

\u5b57\u8282\u578b\uff08Byte\uff09<\/h4>\n<\/p>\n

\u5b57\u8282\u578b\u662f\u6700\u5c0f\u7684\u6570\u636e\u7c7b\u578b\uff0c\u5728\u5185\u5b58\u4e2d\u5360\u75281\u4e2a\u5b57\u8282\uff08\u53738\u4f4d\uff09\uff0c\u53ef\u4ee5\u7528\u6765\u5904\u7406\u6570\u636e\u6d41\u7684\u539f\u59cb\u6570\u636e\u3002\u5b83\u7684\u8303\u56f4\u4ece-128\u5230127\u3002\u5728\u5904\u7406\u6587\u4ef6\u548c\u7f51\u7edc\u4f20\u8f93\u65f6\uff0c\u5b57\u8282\u578b\u53d8\u91cf\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n

\u77ed\u6574\u578b\uff08Short\uff09<\/h4>\n<\/p>\n

\u77ed\u6574\u578b\u5360\u75282\u4e2a\u5b57\u8282\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u6570\u503c\u8303\u56f4\u662f-32,768\u523032,767\u3002\u5b83\u4e3b\u8981\u7528\u4e8e\u8282\u7701\u5185\u5b58\u7684\u573a\u666f\uff0c\u5c24\u5176\u662f\u5927\u6570\u7ec4\u4e2d\uff0c\u5f53\u6574\u578b\u7684\u8303\u56f4\u8fdc\u8d85\u8fc7\u9700\u6c42\u65f6\u3002<\/p>\n<\/p>\n

\u6574\u578b\uff08Int\uff09<\/h4>\n<\/p>\n

\u6574\u578b\u662f\u6700\u5e38\u7528\u7684\u6570\u636e\u7c7b\u578b\u4e4b\u4e00\uff0c\u5360\u75284\u4e2a\u5b57\u8282\u7684\u5185\u5b58\u7a7a\u95f4\u3002\u5b83\u7684\u4f7f\u7528\u573a\u666f\u6781\u5176\u5e7f\u6cdb\uff0c\u4ece\u8ba1\u6570\u5668\u5230\u6570\u5b66\u8fd0\u7b97\u7b49\u51e0\u4e4e\u5728\u6bcf\u4e00\u4e2a\u7a0b\u5e8f\u4e2d\u90fd\u80fd\u770b\u5230\u5176\u8eab\u5f71\u3002<\/p>\n<\/p>\n

\u957f\u6574\u578b\uff08Long\uff09<\/h4>\n<\/p>\n

\u957f\u6574\u578b\u5360\u75288\u4e2a\u5b57\u8282\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u6570\u503c\u8303\u56f4\u975e\u5e38\u5e7f\uff0c\u9002\u7528\u4e8e\u9700\u8981\u5904\u7406\u5927\u6570\u503c\u7684\u573a\u666f\u3002\u5728\u5904\u7406\u6587\u4ef6\u5927\u5c0f\u6216\u8005\u65f6\u95f4\u6233\u65f6\uff0c\u957f\u6574\u578b\u662f\u4e00\u4e2a\u4e0d\u9519\u7684\u9009\u62e9\u3002<\/p>\n<\/p>\n

\u6d6e\u70b9\u578b\uff08Float\uff09<\/h4>\n<\/p>\n

\u6d6e\u70b9\u578b\u5360\u75284\u4e2a\u5b57\u8282\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u7528\u4e8e\u8868\u793a\u6709\u5c0f\u6570\u90e8\u5206\u7684\u6570\u503c\u3002\u5b83\u9002\u7528\u4e8e\u9700\u8981\u7cbe\u5ea6\u4e0d\u662f\u975e\u5e38\u9ad8\u7684\u5c0f\u6570\u8ba1\u7b97\u573a\u666f\u3002<\/p>\n<\/p>\n

\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b\uff08Double\uff09<\/h4>\n<\/p>\n

\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b\u5360\u75288\u4e2a\u5b57\u8282\u7684\u5185\u5b58\uff0c\u63d0\u4f9b\u6bd4\u6d6e\u70b9\u578b\u66f4\u9ad8\u7684\u7cbe\u5ea6\u3002\u8fd9\u4f7f\u5f97\u5b83\u6210\u4e3a\u79d1\u5b66\u8ba1\u7b97\u548c\u7cbe\u786e\u5c0f\u6570\u8ba1\u7b97\u7684\u9996\u9009\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<\/p>\n

\u5b57\u7b26\u578b\uff08Char\uff09<\/h4>\n<\/p>\n

\u5b57\u7b26\u578b\u6570\u636e\u5360\u75282\u4e2a\u5b57\u8282\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u7528\u4e8e\u8868\u793a\u5355\u4e2a\u5b57\u7b26\u3002Java\u4f7f\u7528Unicode\u7f16\u7801\u6807\u51c6\uff0c\u56e0\u6b64\u53ef\u4ee5\u8868\u793a\u4e16\u754c\u4e0a\u51e0\u4e4e\u6240\u6709\u7684\u5b57\u7b26\u3002<\/p>\n<\/p>\n

\u5e03\u5c14\u578b\uff08Boolean\uff09<\/h4>\n<\/p>\n

\u5e03\u5c14\u578b\u6570\u636e\u975e\u5e38\u7279\u6b8a\uff0c\u5b83\u53ea\u8868\u793a\u4e24\u4e2a\u503c\uff1atrue\u548cfalse\u3002\u5c3d\u7ba1\u5728Java\u865a\u62df\u673a\u4e2d\u6ca1\u6709\u660e\u786e\u89c4\u5b9a\u5e03\u5c14\u578b\u6570\u636e\u7684\u5927\u5c0f\uff0c\u4f46\u662f\u5b83\u901a\u5e38\u7528\u4e8e\u63a7\u5236\u8bed\u53e5\u5224\u65ad\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u5f15\u7528\u6570\u636e\u7c7b\u578b<\/h3>\n<\/p>\n

\u7c7b\uff08Class\uff09<\/h4>\n<\/p>\n

\u7c7b\u662fJava\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u57fa\u7840\uff0c\u901a\u8fc7\u7c7b\u53ef\u4ee5\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u3002\u7c7b\u5b9a\u4e49\u4e86\u4e00\u7ec4\u7279\u5b9a\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u5bf9\u8c61\u662f\u7c7b\u7684\u5b9e\u4f8b\u5316\u7ed3\u679c\u3002<\/p>\n<\/p>\n

\u63a5\u53e3\uff08Interface\uff09<\/h4>\n<\/p>\n

\u63a5\u53e3\u5728Java\u4e2d\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u7c7b\u578b\uff0c\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a\u65b9\u6cd5\u96c6\u5408\u4f46\u4e0d\u63d0\u4f9b\u5b9e\u73b0\u3002\u7c7b\u901a\u8fc7\u5b9e\u73b0\u63a5\u53e3\u6765\u5b8c\u6210\u8fd9\u4e9b\u65b9\u6cd5\u7684\u5177\u4f53\u5b9e\u73b0\u3002<\/p>\n<\/p>\n

\u6570\u7ec4\uff08Array\uff09<\/h4>\n<\/p>\n

\u6570\u7ec4\u662f\u5b58\u50a8\u540c\u4e00\u7c7b\u578b\u6570\u636e\u7684\u5bb9\u5668\uff0c\u53ef\u4ee5\u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b\u4e5f\u53ef\u4ee5\u662f\u5f15\u7528\u6570\u636e\u7c7b\u578b\u3002\u6570\u7ec4\u5728\u58f0\u660e\u65f6\u5fc5\u987b\u6307\u5b9a\u5927\u5c0f\uff0c\u5e76\u4e14\u5927\u5c0f\u4e0d\u53ef\u53d8\u3002<\/p>\n<\/p>\n

Java\u7684\u6570\u636e\u7c7b\u578b\u8bbe\u8ba1\u4f7f\u5f97\u7a0b\u5e8f\u65e2\u7075\u6d3b\u53c8\u9ad8\u6548\uff0c\u901a\u8fc7\u9002\u5f53\u7684\u6570\u636e\u7c7b\u578b\u9009\u62e9\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u53ef\u8bfb\u6027\u3002\u4e86\u89e3\u5e76\u719f\u7ec3\u638c\u63e1\u5404\u79cd\u6570\u636e\u7c7b\u578b\u662f\u6bcf\u4e2aJava\u5f00\u53d1\u8005\u5fc5\u5907\u7684\u6280\u80fd\u3002<\/p>\n<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

Java\u7684\u6570\u636e\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f<\/strong><\/p>\n

    \n
  1. \n

    \u4ec0\u4e48\u662fJava\u7684\u6570\u636e\u7c7b\u578b\uff1f
    \nJava\u7684\u6570\u636e\u7c7b\u578b\u662f\u7528\u6765\u5b9a\u4e49\u53d8\u91cf\u548c\u5b58\u50a8\u6570\u636e\u7684\u5206\u7c7b\u3002Java\u7684\u6570\u636e\u7c7b\u578b\u5206\u4e3a\u4e24\u7c7b\uff1a\u57fa\u672c\u6570\u636e\u7c7b\u578b\u548c\u5f15\u7528\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<\/li>\n

  2. \n

    \u57fa\u672c\u6570\u636e\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f
    \nJava\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u5305\u62ec\uff1a\u6574\u578b\uff08int\u3001byte\u3001short\u3001long\uff09\u3001\u6d6e\u70b9\u578b\uff08float\u3001double\uff09\u3001\u5b57\u7b26\u578b\uff08char\uff09\u3001\u5e03\u5c14\u578b\uff08boolean\uff09\u3002<\/p>\n<\/li>\n

  3. \n

    \u5f15\u7528\u6570\u636e\u7c7b\u578b\u6709\u54ea\u4e9b\uff1f
    \nJava\u7684\u5f15\u7528\u6570\u636e\u7c7b\u578b\u5305\u62ec\uff1a\u7c7b\u3001\u63a5\u53e3\u3001\u6570\u7ec4\u3002\u5f15\u7528\u6570\u636e\u7c7b\u578b\u662f\u6307\u90a3\u4e9b\u88ab\u521b\u5efa\u7684\u5bf9\u8c61\uff0c\u53ef\u4ee5\u901a\u8fc7\u5f15\u7528\u6765\u8bbf\u95ee\u3002<\/p>\n<\/li>\n

  4. \n

    \u5982\u4f55\u9009\u62e9\u9002\u5f53\u7684\u6570\u636e\u7c7b\u578b\uff1f
    \n\u9009\u62e9\u9002\u5f53\u7684\u6570\u636e\u7c7b\u578b\u5f88\u91cd\u8981\uff0c\u5b83\u4e0d\u4ec5\u51b3\u5b9a\u4e86\u6570\u636e\u5728\u5185\u5b58\u4e2d\u7684\u5b58\u50a8\u65b9\u5f0f\uff0c\u8fd8\u5f71\u54cd\u4e86\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u5185\u5b58\u6d88\u8017\u3002\u4e00\u822c\u539f\u5219\u662f\uff1a\u5982\u679c\u4f60\u53ea\u9700\u8981\u5b58\u50a8\u6574\u6570\uff0c\u53ef\u4ee5\u9009\u62e9int\u3001byte\u3001short\u6216long\uff1b\u5982\u679c\u9700\u8981\u5b58\u50a8\u5c0f\u6570\uff0c\u53ef\u4ee5\u9009\u62e9float\u6216double\uff1b\u5982\u679c\u9700\u8981\u5b58\u50a8\u5355\u4e2a\u5b57\u7b26\uff0c\u53ef\u4ee5\u9009\u62e9char\uff1b\u5982\u679c\u9700\u8981\u5b58\u50a8\u903b\u8f91\u503c\uff0c\u53ef\u4ee5\u9009\u62e9boolean\u3002\u5f53\u7136\uff0c\u5982\u679c\u9700\u8981\u5b58\u50a8\u5bf9\u8c61\u6216\u8005\u6570\u7ec4\uff0c\u5c31\u8981\u9009\u62e9\u5bf9\u5e94\u7684\u5f15\u7528\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<\/li>\n

  5. \n

    Java\u4e2d\u7684\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\u548c\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u5982\u4f55\u64cd\u4f5c\uff1f
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