编写一个Java application,输出一个整数数组中最大和最小的元素、平均值以及所有元素的和

public class Main {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5};
        int max = arr[0];
        int min = arr[0];
        int sum = 0;
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] > max) {
                max = arr[i];
            }
            if (arr[i] < min) {
                min = arr[i];
            }
            sum += arr[i];
        }
        double avg = (double) sum / arr.length;
        System.out.println("最大值：" + max);
        System.out.println("最小值：" + min);
        System.out.println("平均值：" + avg);
        System.out.println("所有元素的和：" + sum);
    }
}