//说明继承的必要性
package com.test;
public class test {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
//小学生对象
Pupil pl = new Pupil();
//中学生对象
MiddleStu ms = new MiddleStu();
//大学生对象
CollegeStu cs = new CollegeStu();
//设置fee
pl.pay(100);
ms.pay(500);
cs.pay(1000);
//打印设置的fee属性
System.out.println(pl.printFee());
System.out.println(ms.printFee());
System.out.println(cs.printFee());
}
}
//这里的方法不能为public类型
class Stu{
//定义成员属性
public int age;
public String name;
public float fee;
public float printFee()
{
return fee;
}
}
//小学生
class Pupil extends Stu{
//缴费
public void pay(float fee)
{
this.fee = fee;
}
}
//中学生
class MiddleStu extends Stu{
//缴费
public void pay(float fee)
{
this.fee = fee*0.8f;
}
}
//大学生
class CollegeStu extends Stu{
//缴费
public void pay(int fee)
{
this.fee = fee*0.1f;
}
}