30.Java基础_接口_抽象类_具体类实现案例

 public interface SpeakEnglish {
     public abstract void speak();
 }

 public abstract class Person {
     private String name;
     private  int age;
     public Person(){}
     public Person(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 abstract void eat();
 }

 public abstract class Coach extends Person{
     public Coach() {
     }
     public Coach(String name, int age) {
         super(name, age);
     }
     public abstract void teach();
 }

 public abstract class Player extends Person{
     public Player() {
     }
     public Player(String name, int age) {
         super(name, age);
     }
     public abstract void study();
 }

 public class BasketballCoach extends Coach{
     public BasketballCoach() {
     }
     public BasketballCoach(String name, int age) {
         super(name, age);
     }
     @Override
     public void eat() {
         System.out.println("篮球教练吃炒饭!");
     }
     @Override
     public void teach() {
         System.out.println("篮球教练教运球和投篮!");
     }
 }

 public class BasketballPlayer extends Player{
     public BasketballPlayer() {
     }
     public BasketballPlayer(String name, int age) {
         super(name, age);
     }
     @Override
     public void eat() {
         System.out.println("篮球运动员吃炒年糕");
     }
     @Override
     public void study() {
         System.out.println("篮球运动员学习运球和投篮!");
     }
 }

 public class PingPangCoach extends Coach implements SpeakEnglish{
     public PingPangCoach() {
     }
     public PingPangCoach(String name, int age) {
         super(name, age);
     }
     @Override
     public void eat() {
         System.out.println("乒乓球教练吃炒面");
     }
     @Override
     public void teach() {
         System.out.println("乒乓球教练教发球和接球!");
     }
     @Override
     public void speak() {
         System.out.println("乒乓球教练说英语");
     }
 }

 public class PingPangPlayer extends Player implements SpeakEnglish{
     public PingPangPlayer() {
     }
     public PingPangPlayer(String name, int age) {
         super(name, age);
     }
     @Override
     public void eat() {
         System.out.println("乒乓球运动员吃炒粉丝");
     }
     @Override
     public void study() {
         System.out.println("乒乓球运动员学习发球和接球");
     }
     @Override
     public void speak() {
         System.out.println("乒乓球运动员说英语");
     }
 }

 //测试类
 public class test {
     public static void main(String[] args) {
         //创建对象
         PingPangPlayer ppp=new PingPangPlayer("王浩",30);
         System.out.println(ppp.getName()+","+ppp.getAge());
         ppp.eat();
         ppp.study();
         ppp.speak();
         System.out.println("------------------");
         BasketballPlayer bp=new BasketballPlayer("姚明",40);
         System.out.println(bp.getName()+","+bp.getAge());
         bp.eat();
         bp.study();
     }
 }