数组反转

  /**
     * 双指针-数组反转
     *
     * @param array
     * @return
     */
    public static int[] coverArray(int[] array) {
        if (array == null && array.length == 0) {
            return array;
        }
        int j = array.length - 1;
        for (int i = 0; i < j; i++, j--) {
            array[i] = array[i] + array[j];
            array[j] = array[i] - array[j];
            array[i] = array[i] - array[j];
        }
        return array;
    }