运动员和教练案例

代码的实现

1. 抽象类：人

   package PlayerandTeacher;
   
   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 void setName(String name) {
           this.name = name;
       }
   
       public void setAge(int age) {
           this.age = age;
       }
   
       public String getName() {
           return name;
       }
   
       public int getAge() {
           return age;
       }
       public abstract void eat();
   }

2. 抽象类：运动员

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

3. 抽象类：教练

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

4. 接口：学习英语

   package PlayerandTeacher;
   
   public interface English {
       public abstract void SpeakEnglish();
   
   }

5. 具体类：篮球运动员

   package PlayerandTeacher;
   
   public class Basketballplayer extends Player{
       public Basketballplayer() {
       }
   
       public Basketballplayer(String name, int age) {
           super(name, age);
       }
   
       @Override
       public void study() {
           System.out.println("学习如何打篮球");
       }
   
       @Override
       public void eat() {
           System.out.println("喝小米粥");
       }
   
   
   }

6. 具体类：乒乓球运动员

   package PlayerandTeacher;
   
   public class pingpungplayer extends Player implements English{
       public pingpungplayer() {
       }
   
       public pingpungplayer(String name, int age) {
           super(name, age);
       }
   
       @Override
       public void study() {
           System.out.println("学习打乒乓球");
       }
   
       @Override
       public void eat() {
           System.out.println("喝小米粥");
       }
   
       @Override
       public void SpeakEnglish() {
           System.out.println("乒乓球运动员学习说英语");
       }
   }

7. 具体类：乒乓球教练

   package PlayerandTeacher;
   
   public class Pingpungteacher extends Teacher implements English{
       public Pingpungteacher() {
       }
   
       public Pingpungteacher(String name, int age) {
           super(name, age);
       }
   
       @Override
       public void teach() {
           System.out.println("教如何打乒乓球");
       }
   
           @Override
       public void eat() {
           System.out.println("喝大米粥");
       }
   
       @Override
       public void SpeakEnglish() {
           System.out.println("教英语");
       }
   }

8. 具体类：篮球教练

   package PlayerandTeacher;
   
   public class Basketballteacher extends Teacher{
       public Basketballteacher() {
       }
   
       public Basketballteacher(String name, int age) {
           super(name, age);
       }
   
       @Override
       public void teach() {
           System.out.println("教如何打篮球");
       }
   
       @Override
       public void eat() {
           System.out.println("喝大米粥");
       }
   
   
   }

9. 测试类（只测试了运动员）

   package PlayerandTeacher;
   
   public class Demo {
       public static void main(String[] args) {
           pingpungplayer pp=new pingpungplayer();
           pp.setName("张");
           pp.setAge(20);
           System.out.println(pp.getName()+","+pp.getAge());
           pp.study();
           pp.eat();
           pp.SpeakEnglish();
   
   
           Basketballplayer bp=new Basketballplayer("郭",20);
           System.out.println(bp.getName()+","+bp.getAge());
           bp.study();
           bp.eat();
       }
   }