{"id":66699,"date":"2025-05-03T11:12:02","date_gmt":"2025-05-03T03:12:02","guid":{"rendered":"https:\/\/fwq.ai\/blog\/66699\/"},"modified":"2025-05-03T11:12:02","modified_gmt":"2025-05-03T03:12:02","slug":"java-%e6%95%b0%e7%bb%84%e7%bb%88%e6%9e%81%e6%8c%87%e5%8d%97%ef%bc%9a%e4%bb%8e%e9%9b%b6%e5%88%b0%e8%8b%b1%e9%9b%84%ef%bc%88%e5%b8%a6%e7%82%b9%e5%b9%bd%e9%bb%98%ef%bc%89-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/66699\/","title":{"rendered":"Java \u6570\u7ec4\u7ec8\u6781\u6307\u5357\uff1a\u4ece\u96f6\u5230\u82f1\u96c4\uff08\u5e26\u70b9\u5e7d\u9ed8\uff09"},"content":{"rendered":"

\"Java<\/p>\n

\u201c\u6ca1\u6709\u6570\u7ec4\u7684\u7f16\u7a0b\u5c31\u50cf\u6ca1\u6709\u7897\u7684\u70f9\u996a\u4e00\u6837 – \u5f53\u7136\uff0c\u4f60\u53ef\u4ee5<\/em>\u505a\u5230\uff0c\u4f46\u4f60\u8981\u8fd9\u4e48\u505a\u5462\uff1f\u201d*
\u65e0\u8bba\u60a8\u662f\u521a\u521a\u8fdb\u5165 java \u4e16\u754c\uff0c\u8fd8\u662f\u4e00\u4f4d\u7ecf\u9a8c\u4e30\u5bcc\u7684\u7a0b\u5e8f\u5458\uff0c\u6b63\u5728\u6e29\u4e60\u57fa\u7840\u77e5\u8bc6\uff0c\u6df1\u5165\u4e86\u89e3\u6570\u7ec4\u90fd\u53ef\u4ee5\u6539\u53d8\u6e38\u620f\u89c4\u5219\u3002\u6570\u7ec4\u662f\u60a8\u5c06\u9047\u5230\u7684\u6700\u57fa\u672c\u4f46\u6700\u5f3a\u5927\u7684\u6570\u636e\u7ed3\u6784\u4e4b\u4e00\u3002\u8ba9\u6211\u4eec\u4e00\u6b65\u6b65\u5206\u89e3\u6570\u7ec4\u7684\u6bcf\u4e00\u4e2a\u7ec6\u8282\u3002<\/p>\n

\u4ec0\u4e48\u662f\u6570\u7ec4\uff1f <\/h3>\n

\u6570\u7ec4\u5c31\u50cf java \u7684\u5348\u9910\u76d2\u3002\u60a8\u5c06\u4e00\u7ec4\u9879\u76ee\uff08\u6570\u636e\uff09\u6253\u5305\u5230\u4e00\u4e2a\u5bb9\u5668\uff08\u6570\u7ec4\uff09\u4e2d\uff0c\u77a7\uff01\u60a8\u53ef\u4ee5\u968f\u8eab\u643a\u5e26\u5b83\uff0c\u53ea\u9700\u67e5\u627e\u5176\u4f4d\u7f6e\u5373\u53ef\u8bbf\u95ee\u4efb\u4f55\u9879\u76ee\uff0c\u5e76\u6839\u636e\u9700\u8981\u6267\u884c\u64cd\u4f5c\u3002\u6570\u7ec4\u7684\u7f8e\u5999\u4e4b\u5904\u5728\u4e8e\u5b83\u4eec\u7684\u7b80\u5355\u6027\u548c\u9ad8\u6548\u7ec4\u7ec7\u6570\u636e\u7684\u80fd\u529b\u3002<\/p>\n

\u6570\u7ec4\u7684\u7528\u9014 <\/h3>\n

\u6570\u7ec4\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u5143\u7d20\u7684\u56fa\u5b9a\u5927\u5c0f\u3001\u987a\u5e8f\u96c6\u5408\u3002\u8fd9\u610f\u5473\u7740\u5982\u679c\u60a8\u9700\u8981\u5904\u7406\u6574\u6570\u3001\u5b57\u7b26\u4e32\u751a\u81f3\u5bf9\u8c61\u7684\u5217\u8868\uff0c\u6570\u7ec4\u53ef\u4ee5\u5b8c\u6210\u7e41\u91cd\u7684\u5de5\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u76ee\u7684\uff1a<\/p>\n

    \n
  • \n

    \u9ad8\u6548<\/strong>\uff1a\u4f7f\u7528\u7d22\u5f15\u5feb\u901f\u8bbf\u95ee\u3002<\/p>\n<\/li>\n

  • \n

    \u5185\u5b58\u7ba1\u7406<\/strong>\uff1a\u6570\u7ec4\u5206\u914d\u5728\u8fde\u7eed\u7684\u5185\u5b58\u5757\u4e2d\uff0c\u8fd9\u610f\u5473\u7740\u6570\u636e\u5c40\u90e8\u6027\u4ee5\u83b7\u5f97\u66f4\u597d\u7684\u6027\u80fd\u3002<\/p>\n

    \u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<\/li>\n

  • \n

    \u7b80\u5355\u6027<\/strong>\uff1a\u5c06\u76f8\u5173\u6570\u636e\u5206\u7ec4\u5728\u5355\u4e2a\u53d8\u91cf\u540d\u79f0\u4e0b\u3002<\/p>\n<\/li>\n<\/ul>\n

    \u6570\u7ec4\u7684\u5185\u5b58\u8868\u793a <\/h3>\n

    java \u4e2d\u7684\u6570\u7ec4\u5b58\u50a8\u5728 \u8fde\u7eed\u5185\u5b58<\/strong> \u4e2d\u3002\u8fd9\u5c31\u662f\u6709\u8da3\u7684\u5730\u65b9\uff1a<\/p>\n

      \n
    1. \u8fde\u7eed\u5185\u5b58\u5757<\/strong>\uff1a\u5927\u5c0f\u4e3a n \u7684\u6570\u7ec4\u5b58\u50a8\u5728\u53ef\u5bb9\u7eb3 n \u4e2a\u8fde\u7eed\u6570\u636e\u5143\u7d20\u7684\u5185\u5b58\u5757\u4e2d\u3002\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u653e\u7f6e\u5728\u7279\u5b9a\u7684\u7d22\u5f15\u5904\u3002\u5bf9\u4e8e\u6570\u7ec4 arr\uff1a\n
        \n
      • arr[0] \u4f4d\u4e8e\u57fa\u5730\u5740\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n
          \n
        • \n

          arr[1] \u4f4d\u4e8e base_address + size_of_element\u3002<\/p>\n<\/li>\n

        • \n

          \u7b49\u7b49\u3002<\/p>\n<\/li>\n<\/ul>\n

            \n
          1. \u7d22\u5f15<\/strong>\uff1a\u6570\u7ec4\u662f\u96f6\u7d22\u5f15\u7684\u3002\u8fd9\u610f\u5473\u7740\u4f7f\u7528\u7d22\u5f15 0 \u8bbf\u95ee\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0c\u4f7f\u7528\u7d22\u5f15 1 \u8bbf\u95ee\u7b2c\u4e8c\u4e2a\u5143\u7d20\uff0c\u4f9d\u6b64\u7c7b\u63a8<\/li>\n<\/ol>\n

            java \u6570\u7ec4\u58f0\u660e\u5256\u6790 <\/h3>\n

            \u8981\u5728 java \u4e2d\u58f0\u660e\u6570\u7ec4\uff0c\u8bf7\u9075\u5faa\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\uff1a<\/p>\n

            \/\/ declaring and initializing an array of integers\nint[] myarray = new int[5]; \/\/ array of size 5, initialized with default values (0s).\n\n\/\/ shortcut with initialization\nint[] myarray = {1, 2, 3, 4, 5};\n\n\/\/ multidimensional array declaration\nint[][] matrix = new int[3][4]; \/\/ a 3x4 matrix.\n<\/pre>\n
             \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
             \u6570\u7ec4\u7684\u7c7b\u578b <\/h3>\n
              \n
            1.  \u5355\u7ef4\u6570\u7ec4<\/strong>\uff1a\u5c31\u50cf\u4e00\u6761\u76f4\u7ebf\u6570\u636e\u3002 <\/li>\n<\/ol>\n
              string[] names = {\"alice\", \"bob\", \"charlie\"};\n<\/pre>\n
               \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                \n
              1.  \u591a\u7ef4\u6570\u7ec4<\/strong>\uff1a\u5c06\u5b83\u4eec\u89c6\u4e3a\u8868\u683c\uff082d\uff09\u6216\u66f4\u9ad8\u7ef4\u7684\u7f51\u683c\uff083d \u7b49\uff09\u3002 <\/li>\n<\/ol>\n
                int[][] table = {\n    {1, 2, 3},\n    {4, 5, 6},\n    {7, 8, 9}\n};\n<\/pre>\n
                 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                  \n
                1.  \u952f\u9f7f\u72b6\u6570\u7ec4<\/strong>\uff1a\u6bcf\u4e2a\u5b50\u6570\u7ec4\u53ef\u4ee5\u6709\u4e0d\u540c\u957f\u5ea6\u7684\u6570\u7ec4\u3002 <\/li>\n<\/ol>\n
                  int[][] jaggedarray = {\n    {1, 2},\n    {3, 4, 5},\n    {6}\n};\n<\/pre>\n
                   \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                   \u6570\u7ec4\u521d\u59cb\u5316\u6280\u672f <\/h3>\n
                    \n
                  •  \u9759\u6001\u521d\u59cb\u5316<\/strong> \uff1a\u5728\u521b\u5efa\u65f6\u76f4\u63a5\u8d4b\u503c\u3002 <\/li>\n<\/ul>\n
                    int[] numbers = {10, 20, 30, 40};\n<\/pre>\n
                     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                      \n
                    •  \u52a8\u6001\u521d\u59cb\u5316<\/strong>\uff1a\u521b\u5efa\u540e\u53ef\u4ee5\u8d4b\u503c\u3002 <\/li>\n<\/ul>\n
                      int[] numbers = new int[4];\nnumbers[0] = 10;\nnumbers[1] = 20;\n<\/pre>\n
                       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                       \u6570\u7ec4\u65b9\u6cd5\u548c\u6280\u5de7 <\/h3>\n
                      java \u7684 java.util.arrays \u7c7b\u5c31\u50cf\u6570\u7ec4\u7684\u745e\u58eb\u519b\u5200\uff1a<\/p>\n
                        \n
                      •  \u6392\u5e8f<\/strong>\uff1a <\/li>\n<\/ul>\n
                        int[] arr = {5, 3, 8, 1};\narrays.sort(arr); \/\/ arr is now [1, 3, 5, 8]\n<\/pre>\n
                         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                          \n
                        •  \u4e8c\u5206\u67e5\u627e<\/strong>\uff1a <\/li>\n<\/ul>\n
                          int index = arrays.binarysearch(arr, 3); \/\/ finds the index of 3.\n<\/pre>\n
                           \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                            \n
                          •  \u586b\u5145\u6570\u7ec4<\/strong>\uff1a <\/li>\n<\/ul>\n
                            arrays.fill(arr, 10); \/\/ sets all elements to 10.\n<\/pre>\n
                             \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                              \n
                            •  \u6bd4\u8f83\u6570\u7ec4<\/strong>\uff1a <\/li>\n<\/ul>\n
                              int[] arr1 = {1, 2, 3};\nint[] arr2 = {1, 2, 3};\nboolean areequal = arrays.equals(arr1, arr2); \/\/ true\n<\/pre>\n
                               \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                               \u6570\u7ec4\u7b97\u6cd5 <\/h3>\n
                                \n
                              •  \u53cd\u8f6c\u6570\u7ec4<\/strong>\uff1a <\/li>\n<\/ul>\n
                                for (int i = 0; i < arr.length \/ 2; i++) {\n    int temp = arr[i];\n    arr[i] = arr[arr.length - 1 - i];\n    arr[arr.length - 1 - i] = temp;\n}\n<\/pre>\n
                                 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                                  \n
                                •  \u627e\u5230\u6700\u5927\/\u6700\u5c0f\u5143\u7d20<\/strong>\uff1a <\/li>\n<\/ul>\n
                                  int max = arr[0];\nfor (int i = 1; i < arr.length; i++) {\n    if (arr[i] > max) {\n        max = arr[i];\n    }\n}\n<\/pre>\n
                                   \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                                    \n
                                  •  \u65cb\u8f6c\u6570\u7ec4<\/strong>\uff1a \u65cb\u8f6c\u6570\u7ec4\u610f\u5473\u7740\u5c06\u5176\u5143\u7d20\u5411\u5de6\u6216\u5411\u53f3\u79fb\u52a8\u3002 <\/li>\n<\/ul>\n
                                    void rotateright(int[] arr, int steps) {\n    int length = arr.length;\n    steps = steps % length; \/\/ in case steps > length\n    int[] temp = new int[steps];\n    system.arraycopy(arr, length - steps, temp, 0, steps);\n    system.arraycopy(arr, 0, arr, steps, length - steps);\n    system.arraycopy(temp, 0, arr, 0, steps);\n}\n<\/pre>\n
                                     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                                     \u5e38\u89c1\u7684\u6570\u7ec4\u6a21\u5f0f <\/h3>\n
                                      \n
                                    1.  \u6ed1\u52a8\u7a97\u53e3\u6280\u672f<\/strong>\uff1a\u7528\u4e8e\u6d89\u53ca\u8fde\u7eed\u5b50\u6570\u7ec4\u7684\u95ee\u9898\u3002 <\/li>\n<\/ol>\n
                                      int maxsum = 0;\nint windowsum = 0;\nint k = 3; \/\/ size of the window\nfor (int i = 0; i < k; i++) {\n    windowsum += arr[i];\n}\nmaxsum = windowsum;\nfor (int i = k; i < arr.length; i++) {\n    windowsum += arr[i] - arr[i - k];\n    maxsum = math.max(maxsum, windowsum);\n}\n<\/pre>\n
                                       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                                        \n
                                      1.  \u53cc\u6307\u9488\u6280\u672f<\/strong>\uff1a\u975e\u5e38\u9002\u5408\u68c0\u67e5\u603b\u548c\u8fbe\u5230\u76ee\u6807\u7684\u5bf9\u7b49\u95ee\u9898\u3002 <\/li>\n<\/ol>\n
                                        Arrays.sort(arr); \/\/ Required for this approach\nint left = 0, right = arr.length - 1;\nwhile (left < right) {\n    int sum = arr[left] + arr[right];\n    if (sum == target) {\n        \/\/ Found the pair\n    } else if (sum < target) {\n        left++;\n    } else {\n        right--;\n    }\n}\n<\/pre>\n
                                         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
                                         \u4f7f\u7528\u6570\u7ec4\u89e3\u51b3\u95ee\u9898\u7684\u6280\u5de7 <\/h3>\n
                                          \n
                                        • \n
                                          \u8bc6\u522b\u95ee\u9898\u7c7b\u578b<\/strong>\uff1a\u662f\u641c\u7d22\u3001\u6392\u5e8f\u3001\u5b50\u6570\u7ec4\u64cd\u4f5c\u8fd8\u662f\u5206\u533a\uff1f<\/p>\n<\/li>\n
                                        • \n
                                          \u4f7f\u7528\u5c31\u5730\u7b97\u6cd5<\/strong>\u8282\u7701\u7a7a\u95f4\u3002<\/p>\n<\/li>\n
                                        • \n
                                          \u901a\u8fc7\u6700\u5c0f\u5316\u5197\u4f59\u64cd\u4f5c\u6765\u4f18\u5316\u5faa\u73af<\/strong>\u3002<\/p>\n<\/li>\n<\/ul>\n
                                           \u9ad8\u7ea7\u4e3b\u9898\uff1a\u591a\u7ef4\u6570\u7ec4\u548c\u5185\u5b58\u6d1e\u5bdf <\/h3>\n
                                          java\u4e2d\u7684\u6570\u7ec4\u5b58\u50a8\u5728\u5806<\/strong>\u5185\u5b58\u4e2d\u3002\u591a\u7ef4\u6570\u7ec4\u662f\u6570\u7ec4\u7684\u6570\u7ec4\uff0c\u56e0\u6b64\u8bbf\u95ee\u50cf arr[i][j] \u8fd9\u6837\u7684\u5143\u7d20\u9700\u8981\u53d6\u6d88\u5f15\u7528\u4e24\u6b21\uff1a<\/p>\n
                                            \n
                                          • \n
                                            arr \u6307\u5411\u5f15\u7528\u6570\u7ec4\u3002<\/p>\n<\/li>\n
                                          • \n
                                            \u6bcf\u4e2a arr[i] \u672c\u8eab\u5c31\u662f\u5bf9\u53e6\u4e00\u4e2a\u6570\u7ec4\u7684\u5f15\u7528\u3002<\/p>\n<\/li>\n<\/ul>\n
                                             \u4f55\u65f6\u4f7f\u7528\u6570\u7ec4 <\/h3>\n
                                              \n
                                            • \n
                                              \u5f53\u6570\u636e\u662f\u56fa\u5b9a\u5927\u5c0f\u65f6<\/strong>\uff1a\u4f60\u63d0\u524d\u77e5\u9053\u9700\u8981\u591a\u5c11\u4e2a\u5143\u7d20\u3002<\/p>\n<\/li>\n
                                            • \n
                                              \u5f53\u5feb\u901f\u8bbf\u95ee<\/strong>\u81f3\u5173\u91cd\u8981\u65f6\uff1a\u6570\u7ec4\u4e3a\u57fa\u4e8e\u7d22\u5f15\u7684\u8bbf\u95ee\u63d0\u4f9b o(1) \u65f6\u95f4\u590d\u6742\u5ea6\u3002<\/p>\n<\/li>\n<\/ul>\n
                                               \u7ed3\u8bba <\/h3>\n
                                              \u6570\u7ec4\u662f java \u7f16\u7a0b\u5de5\u5177\u5e93\u4e2d\u7684\u57fa\u672c\u5de5\u5177\u3002\u65e0\u8bba\u60a8\u662f\u8981\u53cd\u8f6c\u6570\u7ec4\u3001\u5bf9\u5b83\u4eec\u8fdb\u884c\u6392\u5e8f\u8fd8\u662f\u5728\u590d\u6742\u7684\u7b97\u6cd5\u4e2d\u4f7f\u7528\u5b83\u4eec\uff0c\u4e86\u89e3\u5b83\u4eec\u7684\u7ec6\u5fae\u5dee\u522b\u90fd\u5c06\u4f7f\u60a8\u6210\u4e3a\u66f4\u597d\u7684\u5f00\u53d1\u4eba\u5458\u3002\u8bf7\u8bb0\u4f4f\uff0c\u6570\u7ec4\u770b\u4f3c\u7b80\u5355\uff0c\u4f46\u638c\u63e1\u5176\u5168\u90e8\u6f5c\u529b\u53ef\u4ee5\u4e3a\u590d\u6742\u95ee\u9898\u63d0\u4f9b\u4f18\u96c5\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n
                                              \n
                                              \u5173\u4e8e java \u6570\u7ec4\u7684\u7efc\u5408\u6307\u5357\u5230\u6b64\u7ed3\u675f\u3002\u73b0\u5728\uff0c\u7ee7\u7eed\u4f7f\u7528\u6570\u7ec4\u6765\u514b\u670d\u4e0b\u4e00\u4e2a\u7f16\u7801\u6311\u6218\u3002\u8bf7\u8bb0\u4f4f\uff0c\u6570\u7ec4\u7684\u5927\u5c0f\u53ef\u80fd\u662f\u56fa\u5b9a\u7684\uff0c\u4f46\u60a8\u5bf9\u5b83\u4eec\u7684\u4e86\u89e3\u5e94\u8be5\u4e0d\u65ad\u589e\u957f\uff01<\/p>\n
                                              \u4ee5\u4e0a\u5c31\u662fJava \u6570\u7ec4\u7ec8\u6781\u6307\u5357\uff1a\u4ece\u96f6\u5230\u82f1\u96c4\uff08\u5e26\u70b9\u5e7d\u9ed8\uff09\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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