Java学习的第五十六天

1.例11.5引用保护成员

public class Cjava {
public static void main(String[]args) {
Student1 s1=new Student1(10010,"gabhs",'f',19,"fanog");
s1.show();
    }
}
class Student{
    protected int num;protected  String name;protected  char sex;
    Student(){}
    public Student(int n,String nam,char s) {
        num=n;name=nam;sex=s;
    }
    public void display() {
        System.out.println("num:"+num);
        System.out.println("name:"+name);
        System.out.println("sex:"+sex);
    }
}
class Student1 extends Student{
    private int age;private String addr;
    public Student1(int n,String nam,char s,int a,String ad) {
        super(n,nam,s);
        age=a;addr=ad;
    }
    public void show() {
        System.out.println("num:"+num);
        System.out.println("name:"+name);
        System.out.println("sex:"+sex);
        System.out.println("age:"+age);
        System.out.println("addres:"+addr);
    }
}

2.没问题

3.明天继续写例题