1 class stu 2 { 3     public String stuno; 4     public String name; 5     public float math; 6     public float english; 7     public float computer; 8     public float sum; 9     public float average;10     stu(String stuno1,String name1,float math1,float english1,float computer1) //构造函数11     {12         this.stuno = stuno1;13         this.name = name1;14         this.math = math1;15         this.english = english1;16         this.computer = computer1;17     }18     public void sum() //求和方法19     {20         sum = math + english + computer;21         System.out.println("sum = " + sum);22     }23     public void average() //求平均值方法24     {25         average = sum / 3;26         System.out.println("average = " + average);27     }28     public void max() //求最大值方法29     {30         float max;31         if(math > english)32             if(math > computer)33                 max = math;34             else35                 max = computer;36         else37             if(english > computer)38                 max = english;39             else40                 max = computer;41         System.out.println("最高分为：" + max);42     }43     public void min() //求最小值方法44     {45         float min;46         if(math < english)47             if(math < computer)48                 min = math;49             else50                 min = computer;51         else52             if(english < computer)53                 min = english;54             else55                 min = computer;56         System.out.println("最低分为：" + min);57     }58     public void print() //输出方法59     {60         System.out.println("姓名:" + name + " 学号:" + stuno );61         System.out.println("数学成绩：" + math + " 英语成绩：" + english + " 计算机成绩:" + computer);62     }63 }64 class Student65 {66     public static void main(String args[])67     {68         stu stu1 = new stu("2017025425","马云",99,88,77);69         stu1.print();70         stu1.sum();71         stu1.average();72         stu1.max();73         stu1.min();74     }75 }

运行结果：