while True: n=int(input()) a=list(map(int,input().split())) sum=0 a.sort() for i in range(0,len(a)-1): sum+=a[i]*(len(a)-i-1) m=sum/n print('%.2f'%m)转为java代码

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int n = scanner.nextInt();
            if (n == 0) {
                break;
            }
            int[] a = new int[n];
            for (int i = 0; i < n; i++) {
                a[i] = scanner.nextInt();
            }
            Arrays.sort(a);
            double sum = 0;
            for (int i = 0; i < n - 1; i++) {
                sum += a[i] * (n - i - 1);
            }
            double m = sum / n;
            System.out.printf("%.2f\n", m);
        }
    }
}