Java数组的值如何互换，要用foreach

Question

Answer 1

    public static void main(String[] args) {
        int temp=0;
        int[] arr = new int[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
        System.out.print("原数组\t\t");
        for (int i:arr) {
            System.out.print(i+" ");
        }
        for (int i = 0; i < arr.length - 1; i+=2) {
            temp = arr[i];  //偶数的值
            arr[i] = arr[i+1]; //arr[i+1] 奇数的值
            arr[i+1] = temp;
        }
        System.out.print("\n交换后数组\t");
        for (int i:arr) {
            System.out.print(i+" ");
        }


    }