class Person
    {
        String name,sex;
        int age;
        void set(String n,String s,int a)
        {
            name=n;
            sex=s;
            age=a;
        }
        void show()
        {
            System.out.println("父类的姓名属性的值为："+name);
            System.out.println("父类的性别属性的值为："+sex);
            System.out.println("父类的年龄属性的值为："+age);
        }   
    }
   
    class Student extends Person
    {
        String major,cla;
        int num;
        void sets(String m,String c,int n)
        {
            major=m;
            cla=c;
            num=n;
        }
        void shows()
        {
            System.out.println("子类的专业属性的值为："+major);
            System.out.println("子类的班级属性的值为："+cla);
            System.out.println("子类的学号属性的值为："+num);
        }   
    }
public class shiyan2 {
    public static void main(String args[])
    {   
        Student me=new Student();
        me.sets("通信","通信0904",2009010472);
        me.set("刘晓凯", "女", 21);
        me.show();
        me.shows();
    }
}

老师说用 set 不能用sets　我也不明白什么意思。。。寻求帮助！！