Java编程（7）-交换数组元素

题目要求：

1、输入6个数，并将它们存入数组array中；

2、最大的与第一个元素交换，最小的与最后一个元素交换，然后输出数组。

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java输出数组的三种方式：

1.传统for循环

2.for each 循环 for(int a:array)  system.out.println(a);

3.Array类的toString方法

public class exchange {
    public static void main(String[] args) {
        int[] arr = new int[6];
        Scanner sc = new Scanner(System.in);
        for (int i = 0; i < arr.length; i++) {
            int data = sc.nextInt();
            arr[i] = data;
        }
        System.out.println("原数组为："+ Arrays.toString(arr));
        findAndExchange(arr);
        print(arr);

    }
    public static void findAndExchange(int[] arr1) {
        int max = arr1[0];
        int min = arr1[0];
        int maxIndex = 0;
        int minIndex = 0;
        for (int i = 0; i < arr1.length; i++) {
            if (arr1[i] > max) {
                max = arr1[i];
                maxIndex = i;
            }
            if (arr1[i] < min) {
                min = arr1[i];
                minIndex = i;
            }
        }
        int temp = arr1[maxIndex];
        arr1[maxIndex] = arr1[0];
        arr1[0] = temp;

        int temp1 = arr1[minIndex];
        arr1[minIndex] = arr1[arr1.length-1];
        arr1[arr1.length-1] = temp1;
    }
    public static void print(int[] arr2){
        System.out.print("交换后的数组为：[");
        for (int i = 0; i < arr2.length; i++) {
            if (i == arr2.length-1)
                System.out.print(arr2[i]);
            else {
                System.out.print(arr2[i]+",");
            }
        }
        System.out.print("]");
    }

}

 python编程语言实现：python编程专栏/python11中