解题思路

import java.util.Scanner;

public class Main{
    
    public static void main(String[] args){
        Scanner sin = new Scanner(System.in);
        // 获取输入
        int n = sin.nextInt();
        double[] d = new double[5];
        int i = 0;
        while(sin.hasNextDouble()){
            d[i++] = sin.nextDouble();
        }
        
        
        // 输出 最高分 最低分，平均分
        System.out.println(String.format("%.2f",getMax(d)) + " " +  String.format("%.2f",getMin(d)) + " " +  String.format("%.2f",getAvg(d) / n));
    }
    
    public static double getMax(double[] d){
        double dn = 0.0;
        for(double d1:d){
            if(d1 > dn){
                dn = d1;
            }
        }
        return dn;
    }
    
      public static double getMin(double[] d){
        double dn = 100.0;
        for(double d1:d){
          if(d1 < dn){
                dn = d1;
            }
        }
        return dn;
    }
    
     public static double getAvg(double[] d){
        double dn = 0.0;
        for(double d1:d){
          dn += d1;
        }
        return dn;
    }
}