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();

     }

 }