import java.util.Scanner;
class Person
{
private String name;
private int age;
public Person()
{
System.out.println("调用了Person类的无参数构造方法");
}
public Person(String name,int age)
{
System.out.println("调用了Person类的有参数构造方法");
this.name=name;
this.age=age;
}
public void show()
{
System.out.println("姓名:"+name+" 年龄:"+age);
}
}
class Student extends Person //Student是子类
{
private String department;
public Student()
{
System.out.println("调用了学生类的无参数构造方法Student()");
}
public Student(String name,int age,String dep)
{
super(name,age);
department=dep;
System.out.println("我是"+department+"的学生");
System.out.println("调用了学生类的有参数构造方法Student(String name,int age,String dep)");
}
}
public class App8_2 {
public static void main(String[] args)
{
String sname,dept;
int age;
Student stu1=new Student();
Scanner reader=new Scanner(System.in);
System.out.print("请输入姓名，年龄和所在的系：");
sname=reader.next();
age=reader.nextInt();
dept=reader.next();
//Student stu2=new Student("李小四",23,"信息系");
Student stu2=new Student(sname,age,dept);
stu1.show();
stu2.show();
reader.close();
}
}
运行结果：