public class Person3
{
    protected String name;                   //保護成員
    protected int age;
    void setdata(String n1,int a1) 
    {
        name = n1;
        age = a1;
    } 
    public void print()
    {
        System.out.println(name+", "+age);
    }
}
class Student3 extends  Person3   
{
    protected String dept;
    public static void main(String args[])
    {
        Person3 p1 = new Person3();
        p1.setdata("李大廣",21) ; 
        p1.print();
        Student3 s1 = new Student3() ; 
        s1.setdata("陳小瑞",19);             //調用超類的成員方法
        s1.dept="計算機系";                  //訪問本類的成員變量
        s1.print();
    }
}