异或运算的巧用 → 不用额外的变量，如何交换两个变量的值？

public class xorExchange {
    public static void main(String[] args) {
        int [] arr={1,22,33,44,55,66};
        swapWithoutOtherVar(arr,0,5);
    }

    public static void swapWithoutOtherVar(int[] arr, int i, int j) {
        arr[i] = arr[i] ^ arr[j];
        arr[j] = arr[i] ^ arr[j];
        arr[i] = arr[i] ^ arr[j];
        for (int k = 0; k < arr.length; k++) {
            System.out.println("arr["+k+"]:"+arr[k]);
        }
    }
}

参考--https://www.cnblogs.com/youzhibing/p/15615272.html