{"id":23269,"date":"2024-11-21T15:30:45","date_gmt":"2024-11-21T07:30:45","guid":{"rendered":"https:\/\/fwq.ai\/blog\/23269\/"},"modified":"2024-11-21T15:30:45","modified_gmt":"2024-11-21T07:30:45","slug":"%e6%80%8e%e4%b9%88%e8%bf%9b%e8%a1%8c%e4%bb%a3%e7%a0%81%e4%bc%98%e5%8c%96%e5%92%8c%e6%80%a7%e8%83%bd%e8%b0%83%e4%bc%98%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/23269\/","title":{"rendered":"\u600e\u4e48\u8fdb\u884c\u4ee3\u7801\u4f18\u5316\u548c\u6027\u80fd\u8c03\u4f18\uff1f"},"content":{"rendered":"

\u4ee3\u7801\u4f18\u5316\u548c\u6027\u80fd\u8c03\u4f18\u662f\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u90e8\u5206\uff0c\u4e00\u65b9\u9762\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u8fd0\u884c\u901f\u5ea6\u548c\u6548\u7387\uff0c\u53e6\u4e00\u65b9\u9762\u4e5f\u53ef\u4ee5\u51cf\u5c11\u8d44\u6e90\u7684\u6d88\u8017\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u3002\u8fd9\u7bc7\u6587\u7ae0\u5c06\u5e26\u6765\u4e00\u4e9b\u5e38\u89c1\u7684\u4ee3\u7801\u4f18\u5316\u548c\u6027\u80fd\u8c03\u4f18\u7684\u6280\u5de7\u3002<\/p>\n

\u4e00\u3001\u4ee3\u7801\u4f18\u5316<\/p>\n

    \n
  1. \u51cf\u5c11\u5faa\u73af\u6b21\u6570<\/li>\n<\/ol>\n

    \u51cf\u5c11\u5faa\u73af\u6b21\u6570\u53ef\u4ee5\u51cf\u5c11\u8d44\u6e90\u7684\u6d88\u8017\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0\u5faa\u73af\u6b21\u6570\u7684\u51cf\u5c11\uff1a<\/p>\n

    \uff081\uff09\u4f7f\u7528\u66f4\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5982\u54c8\u5e0c\u8868\u3001\u7ea2\u9ed1\u6811\u7b49\u6765\u66ff\u4ee3\u6570\u7ec4\u548c\u94fe\u8868\u7b49\u6570\u636e\u7ed3\u6784\uff0c\u53ef\u4ee5\u51cf\u5c11\u641c\u7d22\u548c\u6392\u5e8f\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u3002<\/p>\n

    \uff082\uff09\u4f7f\u7528\u7f13\u5b58\u6765\u5b58\u50a8\u8ba1\u7b97\u7ed3\u679c\uff0c\u907f\u514d\u91cd\u590d\u8ba1\u7b97\uff0c\u7279\u522b\u662f\u5728\u8ba1\u7b97\u5bc6\u96c6\u578b\u7684\u573a\u5408\uff0c\u53ef\u4ee5\u5927\u5e45\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n

    \uff083\uff09\u5c06\u591a\u4e2a\u5faa\u73af\u5d4c\u5957\u7684\u4ee3\u7801\u5408\u5e76\u4e3a\u4e00\u4e2a\u5faa\u73af\uff0c\u53ef\u4ee5\u51cf\u5c11\u5faa\u73af\u6b21\u6570\uff0c\u63d0\u5347\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n

      \n
    1. \u7528\u4f4d\u8fd0\u7b97\u66ff\u4ee3\u4e58\u9664\u6cd5<\/li>\n<\/ol>\n

      \u4f4d\u8fd0\u7b97\u80fd\u591f\u5728\u673a\u5668\u7ea7\u522b\u4e0a\u8fdb\u884c\u8ba1\u7b97\uff0c\u56e0\u6b64\u66f4\u5feb\u66f4\u8282\u7701\u8d44\u6e90\uff0c\u53ef\u4ee5\u5927\u5e45\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u53ef\u4ee5\u5c06\u4e00\u4e9b\u7b80\u5355\u7684\u4e58\u9664\u6cd5\u8fd0\u7b97\u66ff\u6362\u4e3a\u4f4d\u8fd0\u7b97\uff0c\u5982\u5c06 a * 2^n \u8f6c\u6362\u4e3a a <\/p>\n

        \n
      1. \u4f18\u5316\u5b57\u7b26\u4e32\u64cd\u4f5c<\/li>\n<\/ol>\n

        \u5b57\u7b26\u4e32\u64cd\u4f5c\u662f\u5f00\u53d1\u4e2d\u5e38\u89c1\u7684\u64cd\u4f5c\u4e4b\u4e00\uff0c\u4f46\u5b83\u4eec\u5f80\u5f80\u662f\u6027\u80fd\u8f83\u4f4e\u7684\u64cd\u4f5c\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u63d0\u5347\u5b57\u7b26\u4e32\u64cd\u4f5c\u7684\u6027\u80fd\uff1a<\/p>\n

        \uff081\uff09\u5c3d\u91cf\u5c11\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u64cd\u4f5c\uff0c\u7279\u522b\u662f\u5728\u5faa\u73af\u4e2d\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u5b57\u7b26\u4e32\u9891\u7e41\u7684\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58\uff0c\u5f71\u54cd\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n

        \uff082\uff09\u4f7f\u7528 StringBuilder \u6216 StringBuffer \u6765\u4ee3\u66ff String \u7c7b\u578b\u6765\u8fdb\u884c\u5b57\u7b26\u4e32\u64cd\u4f5c\uff0c\u53ef\u4ee5\u51cf\u5c11\u5b57\u7b26\u4e32\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58\u7684\u6b21\u6570\uff0c\u5927\u5e45\u63d0\u5347\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n

        \uff083\uff09\u4f7f\u7528 intern() \u65b9\u6cd5\u6765\u51cf\u5c11\u5b57\u7b26\u4e32\u7684\u91cd\u590d\uff0c\u7279\u522b\u662f\u5728\u5b57\u7b26\u4e32\u6bd4\u8f83\u548c\u5224\u65ad\u4e2d\uff0cintern() \u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u4e2d\u7684\u91cd\u590d\u5b57\u7b26\u4e32\u8fdb\u884c\u5408\u5e76\uff0c\u4ece\u800c\u63d0\u5347\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n

          \n
        1. \u4f18\u5316\u5f02\u5e38\u5904\u7406<\/li>\n<\/ol>\n

          \u5f02\u5e38\u5904\u7406\u662f\u7f16\u5199 Java \u4ee3\u7801\u4e2d\u5fc5\u4e0d\u53ef\u5c11\u7684\u90e8\u5206\u4e4b\u4e00\uff0c\u4f46\u5b83\u4e5f\u662f\u4e00\u4e9b\u7a0b\u5e8f\u6027\u80fd\u74f6\u9888\u4e4b\u4e00\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u4f18\u5316\u5f02\u5e38\u5904\u7406\uff0c\u63d0\u5347\u7a0b\u5e8f\u7684\u6548\u7387\uff1a<\/p>\n

          \uff081\uff09\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u5904\u7406\u9884\u671f\u7684\u9519\u8bef\uff0c\u5c24\u5176\u662f\u5728\u5faa\u73af\u4e2d\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u3002\u56e0\u4e3a\u5f02\u5e38\u5904\u7406\u9700\u8981\u5728\u5806\u6808\u4e2d\u5411\u4e0a\u641c\u5bfb\uff0c\u8fd9\u4f1a\u6d88\u8017\u5927\u91cf\u7684\u8d44\u6e90\uff0c\u5f71\u54cd\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n

          \uff082\uff09\u5728\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u5757\u4e2d\u907f\u514d\u6267\u884c\u592a\u591a\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u51cf\u5c0f\u5f02\u5e38\u5904\u7406\u7684\u5f00\u9500\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002<\/p>\n

          \uff083\uff09\u5728\u5f02\u5e38\u5904\u7406\u4e2d\u5c3d\u91cf\u51cf\u5c11\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\uff0c\u56e0\u4e3a\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\u4e5f\u4f1a\u6d88\u8017\u5927\u91cf\u7684\u8d44\u6e90\u3002\u5c3d\u91cf\u5c06\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\u653e\u5728\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u5757\u4e4b\u5916\u3002<\/p>\n

            \n
          1. \u4f7f\u7528 JIT \u7f16\u8bd1\u5668<\/li>\n<\/ol>\n

            JIT\uff08Just-In-Time\uff09\u7f16\u8bd1\u5668\u662f Java \u865a\u62df\u673a\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u80fd\u591f\u52a8\u6001\u5730\u5c06 Java \u4ee3\u7801\u7f16\u8bd1\u4e3a\u672c\u5730\u673a\u5668\u7801\uff0c\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u542f\u7528 JIT \u7f16\u8bd1\u5668\u53ef\u4ee5\u5927\u5e45\u63d0\u5347\u7a0b\u5e8f\u7684\u8fd0\u884c\u901f\u5ea6\u3002<\/p>\n

              \n
            1. \u51cf\u5c11\u5185\u5b58\u6cc4\u6f0f<\/li>\n<\/ol>\n

              \u5185\u5b58\u6cc4\u6f0f\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u7a0b\u5e8f\u95ee\u9898\uff0c\u5982\u679c\u7a0b\u5e8f\u4e2d\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f\uff0c\u5c06\u4f1a\u5bfc\u81f4\u5185\u5b58\u5360\u7528\u8fc7\u9ad8\uff0c\u6700\u7ec8\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\u3002\u53ef\u4ee5\u901a\u8fc7\u8ffd\u8e2a\u7a0b\u5e8f\u7684\u5185\u5b58\u5206\u914d\u548c\u56de\u6536\uff0c\u53ca\u65f6\u53d1\u73b0\u7a0b\u5e8f\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u5e76\u91c7\u53d6\u63aa\u65bd\u8fdb\u884c\u4fee\u590d\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u5bf9\u7a0b\u5e8f\u6027\u80fd\u7684\u5f71\u54cd\u3002<\/p>\n

              \u4e8c\u3001\u6027\u80fd\u8c03\u4f18<\/p>\n

                \n
              1. \u4f7f\u7528\u7f13\u5b58<\/li>\n<\/ol>\n

                \u4f7f\u7528\u7f13\u5b58\u53ef\u4ee5\u51cf\u5c11\u6570\u636e\u5e93\u6216\u5176\u4ed6 I\/O \u64cd\u4f5c\u7684\u6b21\u6570\uff0c\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u5728\u7f13\u5b58\u4e2d\u5b58\u50a8\u70ed\u70b9\u6570\u636e\uff0c\u5c3d\u91cf\u907f\u514d\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u88ab\u9891\u7e41\u66f4\u6539\uff0c\u53ef\u4ee5\u51cf\u5c11\u7f13\u5b58\u7684\u66f4\u65b0\u6b21\u6570\uff0c\u66f4\u597d\u5730\u5229\u7528\u7f13\u5b58\u3002<\/p>\n

                  \n
                1. \u51cf\u5c11\u6570\u636e\u5e93\u64cd\u4f5c\u6b21\u6570<\/li>\n<\/ol>\n

                  \u6570\u636e\u5e93\u64cd\u4f5c\u901a\u5e38\u662f\u7a0b\u5e8f\u4e2d\u7684\u65f6\u95f4\u74f6\u9888\u4e4b\u4e00\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u51cf\u5c11\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6b21\u6570\uff1a<\/p>\n

                  \uff081\uff09\u4f7f\u7528\u6279\u91cf\u5904\u7406\uff0c\u5c06\u591a\u4e2a\u6570\u636e\u5e93\u64cd\u4f5c\u5408\u5e76\u4e3a\u4e00\u6b21\u64cd\u4f5c\uff0c\u53ef\u4ee5\u51cf\u5c11\u8fde\u63a5\u6570\u636e\u5e93\u7684\u6b21\u6570\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u6548\u7387\u3002<\/p>\n

                  \uff082\uff09\u4f7f\u7528\u7f13\u5b58\uff0c\u5c06\u5e38\u7528\u7684\u6570\u636e\u5e93\u8bb0\u5f55\u7f13\u5b58\u5230\u5185\u5b58\u4e2d\uff0c\u907f\u514d\u91cd\u590d\u67e5\u8be2\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u6548\u7387\u3002<\/p>\n

                  \uff083\uff09\u5bf9\u6570\u636e\u5e93\u8fdb\u884c\u4f18\u5316\uff0c\u5982\u521b\u5efa\u9002\u5f53\u7684\u7d22\u5f15\u3001\u5408\u7406\u7f16\u5199 SQL \u8bed\u53e5\u7b49\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6570\u636e\u5e93\u7684\u67e5\u8be2\u6548\u7387\u3002<\/p>\n

                    \n
                  1. \u5206\u79bb\u4e1a\u52a1\u903b\u8f91<\/li>\n<\/ol>\n

                    \u5c06\u4e1a\u52a1\u903b\u8f91\u5206\u79bb\u5f00\u6765\uff0c\u53ef\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8ba1\u7b97\u548c\u67e5\u8be2\uff0c\u5e76\u7b80\u5316\u7a0b\u5e8f\u4ee3\u7801\u3002\u53ef\u4ee5\u6839\u636e\u4e1a\u52a1\u9700\u6c42\u5c06\u7a0b\u5e8f\u4e2d\u4e0d\u540c\u7684\u4e1a\u52a1\u903b\u8f91\u5212\u5206\u4e3a\u4e0d\u540c\u7684\u6a21\u5757\uff0c\u5206\u522b\u8fdb\u884c\u5904\u7406\uff0c\u4ece\u800c\u5b9e\u73b0\u7a0b\u5e8f\u7684\u6700\u4f73\u6027\u80fd\u3002<\/p>\n

                      \n
                    1. \u4f7f\u7528\u591a\u7ebf\u7a0b<\/li>\n<\/ol>\n

                      \u591a\u7ebf\u7a0b\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5e76\u884c\u5904\u7406\u80fd\u529b\uff0c\u4ece\u800c\u5b9e\u73b0\u66f4\u9ad8\u7684\u7a0b\u5e8f\u6548\u7387\u3002\u53ef\u4ee5\u5c06\u7a0b\u5e8f\u4e2d\u4e00\u4e9b\u8017\u65f6\u7684\u64cd\u4f5c\u4f7f\u7528\u591a\u7ebf\u7a0b\u6765\u5904\u7406\uff0c\u4ece\u800c\u8fbe\u5230\u63d0\u9ad8\u7a0b\u5e8f\u8fd0\u884c\u6548\u7387\u7684\u6548\u679c\u3002<\/p>\n

                      \u603b\u7ed3\uff1a<\/p>\n

                      \u4ee3\u7801\u4f18\u5316\u548c\u6027\u80fd\u8c03\u4f18\u9700\u8981\u6839\u636e\u7a0b\u5e8f\u7684\u9700\u6c42\u548c\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u5177\u4f53\u7684\u5206\u6790\u548c\u5b9e\u8df5\u3002\u901a\u8fc7\u4e0a\u8ff0\u7684\u4f18\u5316\u6280\u5de7\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u8fd0\u884c\u901f\u5ea6\u548c\u6548\u7387\uff0c\u51cf\u5c11\u8d44\u6e90\u7684\u6d88\u8017\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\uff0c\u4ece\u800c\u63d0\u5347\u7a0b\u5e8f\u7684\u6574\u4f53\u6027\u80fd\u3002<\/p>\n

                      \u4ee5\u4e0a\u5c31\u662f\u600e\u4e48\u8fdb\u884c\u4ee3\u7801\u4f18\u5316\u548c\u6027\u80fd\u8c03\u4f18\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

                      \u4ee3\u7801\u4f18\u5316\u548c\u6027\u80fd\u8c03\u4f18\u662f\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u90e8\u5206\uff0c\u4e00\u65b9\u9762\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u8fd0\u884c\u901f\u5ea6\u548c\u6548\u7387\uff0c\u53e6\u4e00\u65b9\u9762\u4e5f\u53ef\u4ee5\u51cf\u5c11\u8d44\u6e90\u7684\u6d88\u8017\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u53ef\u9760\u6027\u548c\u7a33\u5b9a\u6027\u3002\u8fd9\u7bc7\u6587\u7ae0\u5c06\u5e26\u6765\u4e00\u4e9b\u5e38\u89c1\u7684\u4ee3\u7801\u4f18\u5316\u548c\u6027\u80fd\u8c03\u4f18\u7684\u6280\u5de7\u3002 \u4e00\u3001\u4ee3\u7801\u4f18\u5316 \u51cf\u5c11\u5faa\u73af\u6b21\u6570 \u51cf\u5c11\u5faa\u73af\u6b21\u6570\u53ef\u4ee5\u51cf\u5c11\u8d44\u6e90\u7684\u6d88\u8017\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0\u5faa\u73af\u6b21\u6570\u7684\u51cf\u5c11\uff1a \uff081\uff09\u4f7f\u7528\u66f4\u9ad8\u6548\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5982\u54c8\u5e0c\u8868\u3001\u7ea2\u9ed1\u6811\u7b49\u6765\u66ff\u4ee3\u6570\u7ec4\u548c\u94fe\u8868\u7b49\u6570\u636e\u7ed3\u6784\uff0c\u53ef\u4ee5\u51cf\u5c11\u641c\u7d22\u548c\u6392\u5e8f\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u3002 \uff082\uff09\u4f7f\u7528\u7f13\u5b58\u6765\u5b58\u50a8\u8ba1\u7b97\u7ed3\u679c\uff0c\u907f\u514d\u91cd\u590d\u8ba1\u7b97\uff0c\u7279\u522b\u662f\u5728\u8ba1\u7b97\u5bc6\u96c6\u578b\u7684\u573a\u5408\uff0c\u53ef\u4ee5\u5927\u5e45\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002 \uff083\uff09\u5c06\u591a\u4e2a\u5faa\u73af\u5d4c\u5957\u7684\u4ee3\u7801\u5408\u5e76\u4e3a\u4e00\u4e2a\u5faa\u73af\uff0c\u53ef\u4ee5\u51cf\u5c11\u5faa\u73af\u6b21\u6570\uff0c\u63d0\u5347\u7a0b\u5e8f\u7684\u6548\u7387\u3002 \u7528\u4f4d\u8fd0\u7b97\u66ff\u4ee3\u4e58\u9664\u6cd5 \u4f4d\u8fd0\u7b97\u80fd\u591f\u5728\u673a\u5668\u7ea7\u522b\u4e0a\u8fdb\u884c\u8ba1\u7b97\uff0c\u56e0\u6b64\u66f4\u5feb\u66f4\u8282\u7701\u8d44\u6e90\uff0c\u53ef\u4ee5\u5927\u5e45\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u53ef\u4ee5\u5c06\u4e00\u4e9b\u7b80\u5355\u7684\u4e58\u9664\u6cd5\u8fd0\u7b97\u66ff\u6362\u4e3a\u4f4d\u8fd0\u7b97\uff0c\u5982\u5c06 a * 2^n \u8f6c\u6362\u4e3a a \u4f18\u5316\u5b57\u7b26\u4e32\u64cd\u4f5c \u5b57\u7b26\u4e32\u64cd\u4f5c\u662f\u5f00\u53d1\u4e2d\u5e38\u89c1\u7684\u64cd\u4f5c\u4e4b\u4e00\uff0c\u4f46\u5b83\u4eec\u5f80\u5f80\u662f\u6027\u80fd\u8f83\u4f4e\u7684\u64cd\u4f5c\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u63d0\u5347\u5b57\u7b26\u4e32\u64cd\u4f5c\u7684\u6027\u80fd\uff1a \uff081\uff09\u5c3d\u91cf\u5c11\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\u64cd\u4f5c\uff0c\u7279\u522b\u662f\u5728\u5faa\u73af\u4e2d\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u5b57\u7b26\u4e32\u9891\u7e41\u7684\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58\uff0c\u5f71\u54cd\u7a0b\u5e8f\u7684\u6548\u7387\u3002 \uff082\uff09\u4f7f\u7528 StringBuilder \u6216 StringBuffer \u6765\u4ee3\u66ff String \u7c7b\u578b\u6765\u8fdb\u884c\u5b57\u7b26\u4e32\u64cd\u4f5c\uff0c\u53ef\u4ee5\u51cf\u5c11\u5b57\u7b26\u4e32\u5206\u914d\u548c\u91ca\u653e\u5185\u5b58\u7684\u6b21\u6570\uff0c\u5927\u5e45\u63d0\u5347\u7a0b\u5e8f\u7684\u6548\u7387\u3002 \uff083\uff09\u4f7f\u7528 intern() \u65b9\u6cd5\u6765\u51cf\u5c11\u5b57\u7b26\u4e32\u7684\u91cd\u590d\uff0c\u7279\u522b\u662f\u5728\u5b57\u7b26\u4e32\u6bd4\u8f83\u548c\u5224\u65ad\u4e2d\uff0cintern() \u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u4e2d\u7684\u91cd\u590d\u5b57\u7b26\u4e32\u8fdb\u884c\u5408\u5e76\uff0c\u4ece\u800c\u63d0\u5347\u7a0b\u5e8f\u7684\u6548\u7387\u3002 \u4f18\u5316\u5f02\u5e38\u5904\u7406 \u5f02\u5e38\u5904\u7406\u662f\u7f16\u5199 Java \u4ee3\u7801\u4e2d\u5fc5\u4e0d\u53ef\u5c11\u7684\u90e8\u5206\u4e4b\u4e00\uff0c\u4f46\u5b83\u4e5f\u662f\u4e00\u4e9b\u7a0b\u5e8f\u6027\u80fd\u74f6\u9888\u4e4b\u4e00\u3002\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u4f18\u5316\u5f02\u5e38\u5904\u7406\uff0c\u63d0\u5347\u7a0b\u5e8f\u7684\u6548\u7387\uff1a \uff081\uff09\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u5904\u7406\u9884\u671f\u7684\u9519\u8bef\uff0c\u5c24\u5176\u662f\u5728\u5faa\u73af\u4e2d\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u3002\u56e0\u4e3a\u5f02\u5e38\u5904\u7406\u9700\u8981\u5728\u5806\u6808\u4e2d\u5411\u4e0a\u641c\u5bfb\uff0c\u8fd9\u4f1a\u6d88\u8017\u5927\u91cf\u7684\u8d44\u6e90\uff0c\u5f71\u54cd\u7a0b\u5e8f\u7684\u6548\u7387\u3002 \uff082\uff09\u5728\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u5757\u4e2d\u907f\u514d\u6267\u884c\u592a\u591a\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u51cf\u5c0f\u5f02\u5e38\u5904\u7406\u7684\u5f00\u9500\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002 \uff083\uff09\u5728\u5f02\u5e38\u5904\u7406\u4e2d\u5c3d\u91cf\u51cf\u5c11\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\uff0c\u56e0\u4e3a\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\u4e5f\u4f1a\u6d88\u8017\u5927\u91cf\u7684\u8d44\u6e90\u3002\u5c3d\u91cf\u5c06\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u9500\u6bc1\u653e\u5728\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u5757\u4e4b\u5916\u3002 \u4f7f\u7528 JIT \u7f16\u8bd1\u5668 JIT\uff08Just-In-Time\uff09\u7f16\u8bd1\u5668\u662f Java \u865a\u62df\u673a\u7684\u4e00\u90e8\u5206\uff0c\u5b83\u80fd\u591f\u52a8\u6001\u5730\u5c06 Java \u4ee3\u7801\u7f16\u8bd1\u4e3a\u672c\u5730\u673a\u5668\u7801\uff0c\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u542f\u7528 JIT \u7f16\u8bd1\u5668\u53ef\u4ee5\u5927\u5e45\u63d0\u5347\u7a0b\u5e8f\u7684\u8fd0\u884c\u901f\u5ea6\u3002 \u51cf\u5c11\u5185\u5b58\u6cc4\u6f0f \u5185\u5b58\u6cc4\u6f0f\u662f\u4e00\u79cd\u5e38\u89c1\u7684\u7a0b\u5e8f\u95ee\u9898\uff0c\u5982\u679c\u7a0b\u5e8f\u4e2d\u5b58\u5728\u5185\u5b58\u6cc4\u6f0f\uff0c\u5c06\u4f1a\u5bfc\u81f4\u5185\u5b58\u5360\u7528\u8fc7\u9ad8\uff0c\u6700\u7ec8\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\u3002\u53ef\u4ee5\u901a\u8fc7\u8ffd\u8e2a\u7a0b\u5e8f\u7684\u5185\u5b58\u5206\u914d\u548c\u56de\u6536\uff0c\u53ca\u65f6\u53d1\u73b0\u7a0b\u5e8f\u4e2d\u7684\u5185\u5b58\u6cc4\u6f0f\uff0c\u5e76\u91c7\u53d6\u63aa\u65bd\u8fdb\u884c\u4fee\u590d\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u5bf9\u7a0b\u5e8f\u6027\u80fd\u7684\u5f71\u54cd\u3002 \u4e8c\u3001\u6027\u80fd\u8c03\u4f18 \u4f7f\u7528\u7f13\u5b58 \u4f7f\u7528\u7f13\u5b58\u53ef\u4ee5\u51cf\u5c11\u6570\u636e\u5e93\u6216\u5176\u4ed6 I\/O \u64cd\u4f5c\u7684\u6b21\u6570\uff0c\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u3002\u5728\u7f13\u5b58\u4e2d\u5b58\u50a8\u70ed\u70b9\u6570\u636e\uff0c\u5c3d\u91cf\u907f\u514d\u7f13\u5b58\u4e2d\u7684\u6570\u636e\u88ab\u9891\u7e41\u66f4\u6539\uff0c\u53ef\u4ee5\u51cf\u5c11\u7f13\u5b58\u7684\u66f4\u65b0\u6b21\u6570\uff0c\u66f4\u597d\u5730\u5229\u7528\u7f13\u5b58\u3002 \u51cf\u5c11\u6570\u636e\u5e93\u64cd\u4f5c\u6b21\u6570 \u6570\u636e\u5e93\u64cd\u4f5c\u901a\u5e38\u662f\u7a0b\u5e8f\u4e2d\u7684\u65f6\u95f4\u74f6\u9888\u4e4b\u4e00\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u51cf\u5c11\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u6b21\u6570\uff1a \uff081\uff09\u4f7f\u7528\u6279\u91cf\u5904\u7406\uff0c\u5c06\u591a\u4e2a\u6570\u636e\u5e93\u64cd\u4f5c\u5408\u5e76\u4e3a\u4e00\u6b21\u64cd\u4f5c\uff0c\u53ef\u4ee5\u51cf\u5c11\u8fde\u63a5\u6570\u636e\u5e93\u7684\u6b21\u6570\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u6548\u7387\u3002 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-23269","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23269","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=23269"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/23269\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=23269"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=23269"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=23269"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}