super用法

Person类：

public class Person {
String _name;
int _age;
public Person(String name,int age)
{
 _name=    name;
 _age=age;
}
}

Student类：

public class Student extends Person
{
    String _school;
    public Student(String name,int age,String school)
    {
        super(name,age);
        _school=school;
    }

    public String GetNameAndAge()
    {
        return "Name:"+super._name+";Age:"+super._age;
    }
}

入口类：

public class ExecStudent {
public static void main(String[] args)
{
  Student _student=new     Student("zhang san",19,"riben university");
  System.out.println("School:"+_student._school);
  System.out.println("Name and age:"+_student.GetNameAndAge());
}
}