public class Student {//学生类 private int num; private String name; private int age; private int java; private int c_sharp; private int html; private int sql; private int sum; private double avg; public int getNum(){ return num; } public void setNum(int num){ this.num=num; } ...
求java代码，要求做一个测试类，实现以下功能之一。最好三个功能都有。
