java实现定义一个长度为8的数组,里面的元素值随便给,从控制台输入两个数字作为下标,交换对应下标位置的元素值, 例如 输出数字为2和3，交换下标2和下标3位置的元素值

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5, 6, 7, 8};
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入下标1：");
        int index1 = scanner.nextInt();
        System.out.print("请输入下标2：");
        int index2 = scanner.nextInt();
        int temp = arr[index1];
        arr[index1] = arr[index2];
        arr[index2] = temp;
        for (int i = 0; i < arr.length; i++) {
            System.out.print(arr[i] + " ");
        }
    }
}