/*
乒乓秋运动员/教练(说英语)
篮球运动员/教练
都有姓名/年龄
运动员 训练 教练 指导
人 吃饭/睡觉
*/
class YunDongDemo
{
public static void main(String[] args)
{
PingPongPlayer ppp = new PingPongPlayer();
ppp.study();
ppp.eat();
ppp.speak();
ppp.sleep();
System.out.println("Hello World!");
PingPongCoach ppc = new PingPongCoach();
ppc.eat();
ppc.teach();
ppc.sleep();
ppc.speak();
System.out.println("Hello World!");
BasketCoach bc = new BasketCoach();
bc.eat();
bc.teach();
bc.sleep();
System.out.println("Hello World!");
BasketPlayer bp = new BasketPlayer();
bp.eat();
bp.study();
bp.sleep();
System.out.println("Hello World!");
}
}
interface Speak//定义接口interface接口+接口名--interface interface abstract抽象abstract
{
public abstract void speak();
}
abstract class Person//类中有抽象方法,类就一定是抽象类
{
private String name;
private int age;
public Person(){}//无参构造,构造名与类名完全一致
public Person(String name,int age)//带参构造
{
this.name = name;
this.age = age;
}
public void sleep()//成员方法
{
System.out.println("睡觉");
}
public abstract void eat();//抽象方法没有方法体{},修饰词abstract
public void setName(String name)
{
this.name = name;
}
public String getName()
{
return name;
}
public void setAge(int age)
{
this.age = age;
}
public int getAge()
{
return age;
}
}
//运动员
abstract class Player extends Person
{
public Player(){};
public abstract void study();//方法名第一个单词首字母小写抽象没有方法体,用abstract修饰
}
//教练
abstract class Coach extends Person
{
public Coach(){};
public abstract void teach();
}
//乒乓球运动员
class PingPongPlayer extends Player implements Speak//implements(实现)继承类;实现接口
{
public void study()
{
System.out.println("乒乓球运动员学习接发乒乓球");
}
public void eat()
{
System.out.println("乒乓球运动员吃生煎包");
}
public void speak()
{
System.out.println("乒乓球运动员说英语");
}
}
//篮球运动员
class BasketPlayer extends Player //implements(实现)继承类;实现接口
{
public void study()
{
System.out.println("篮球运动员学习三分突破");
}
public void eat()
{
System.out.println("篮球运动员吃牛肉面");
}
}
//篮球教练
class BasketCoach extends Coach
{
public void eat()
{
System.out.println("篮球教练吃炒饼");
}
public void teach()
{
System.out.println("篮球教练指导运球突破三分");
}
}
//乒乓球教练
class PingPongCoach extends Coach
{
public void eat()
{
System.out.println("乒乓球教练吃盖饭");
}
public void teach()
{
System.out.println("乒乓球教练指导接发球");
}
public void speak()
{
System.out.println("乒乓球教练说英语");
}
}
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