接口与抽象类典型应用例子

/*

教练和运动员案例

乒乓球运动员和篮球运动员

乒乓球教练和篮球教练

为了出国交流，跟乒乓球相关的人员都需要学习英语。

请用所学知识：

分析，这个案例中有哪些抽象类，哪些接口，哪些具体类。

分析过程通过画图讲解的

*/

//定义一个说英语的接口

interface SpeakEnglish{

public abstract void speak();

}

//定义人的抽象类

abstract class Person1{

private String name;

private int age;

public Person1(){}

public Person1(String name,int age){

this.name = name;

this.age = age;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public void sleep(){

System.out.println("睡觉");

}

public abstract void eat();

}

//定义运动员抽象类

abstract class Player extends Person1{

public Player(){}

public Player(String name, int age){

super(name,age);

}

//学习

public abstract void study();

}

//定义教练抽象类

abstract class Coach extends Person1{

public Coach(){}

public Coach(String name, int age){

super(name,age);

}

//教

public abstract void teach();

}

//定义乒乓球运动员具体类

class PingPangPlayer extends Player implements SpeakEnglish{

public PingPangPlayer(){}

public PingPangPlayer(String name, int age){

super(name,age);

}

//吃

public void eat(){

System.out.println("乒乓球运动员吃大白菜，喝小米粥");

}

//学习

public void study(){

System.out.println("乒乓球运动员学习如何发球和接球");

}

//说英语

public void speak(){

System.out.println("乒乓球运动员说英语");

}

}

//定义乒乓球教练具体类

class PingPangCoach extends Coach implements SpeakEnglish{

public PingPangCoach(){}

public PingPangCoach(String name, int age){

super(name,age);

}

//吃

public void eat(){

System.out.println("乒乓球教练吃小白菜，喝大米粥");

}

//教

public void teach(){

System.out.println("乒乓球教练教如何发球和接球");

}

//说英语

public void speak(){

System.out.println("乒乓球教练说英语");

}

}

//篮球运动员具体类

class BasketballPlayer extends Player{

public BasketballPlayer(){}

public BasketballPlayer(String name, int age){

super(name,age);

}

//吃

public void eat(){

System.out.println("篮球运动员吃牛肉和牛奶");

}

//学习

public void study(){

System.out.println("篮球运动员学习如何运球和投篮");

}

}

//篮球教练具体类

class BasketballCoach extends Player{

public BasketballCoach(){}

public BasketballCoach(String name, int age){

super(name,age);

}

//吃

public void eat(){

System.out.println("篮球运教练吃羊肉和羊奶");

}

//学习

public void study(){

System.out.println("篮球教练教如何运球和投篮");

}

}

public class InterfaceDemo3 {

public static void main(String[] args) {

// TODO Auto-generated method stub

//测试运动员(乒乓球运动运和篮球运动员)

PingPangPlayer ppp = new PingPangPlayer();

ppp.setName("王浩");

ppp.setAge(33);

System.out.println(ppp.getName()+"---"+ppp.getAge());

ppp.eat();

ppp.sleep();

ppp.study();

ppp.speak();

System.out.println("----------------------");

//通过带参构造给数据

//测试篮球运动员

BasketballPlayer bp = new BasketballPlayer();

bp.setName("姚明");

bp.setAge(34);

System.out.println(bp.getName()+"---"+bp.getAge());

bp.eat();

bp.sleep();

bp.study();

//bp.speak();没有改方法

}

}