定義原陣列和接收結果的陣列
  int[] array1 = new int[]{1, 8, 6, 5, 7, 12, 31, 89, 100};
  int[] result;
   printArray(array1);
   result = resetArray(array1, 31);
   printArray(result);
  //下面是具體實現方法
   private int[] resetArray(int[] array1, int element) {
        int index = -1;
        for (int i = 0; i < array1.length
 
; i++) {
            if (array1[i] == element) {
                index = i;
                break;
            }
        }

        if (index == -1) {
            //如果不含這個元素，就原樣返回
            return array1;
        }
        int[] array2 = new int[array1.length - 1];
        if (index == array1.length
 
 - 1) {
            array2 = Arrays.copyOf(array1, array1.length - 1);
        } else {
            for (int i = 0; i < array1.length; i++) {
                if (i < index) {
                    array2[i] = array1[i];
                } else if (i >= index && i < array1.length - 1) {
                    array2[i] = array1[i + 1
 
];
                }
            }
        }
        return array2;
    }

   //列印陣列
    private void printArray(int[] array) {
        String result = "[";
        for (int i = 0; i < array.length; i++) {
            result = result + array[i] + ",";
            if (i == array.length - 1) {
                result = result.substring(0, result.length() - 1) + "]";
            }
        }
        System.out.println("輸出：" + result);
    }

下面是執行之後的結果