JavaSE-11.4【综合案例-多态&抽象类&接口】

 

 

 

 

 

 

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package day2.yubaby04;   /* 4 综合案例-多态&抽象类&接口  */   public class PersonDemo {       public static void main(String[] args) {         PingpangPlayer ppp = new PingpangPlayer();         ppp.setName("java");         ppp.setAge(23);         System.out.println(ppp.getName() + "," + ppp.getAge());         ppp.eat();         ppp.study();         ppp.speak();           PingpangCoach ppc = new PingpangCoach("avaj", 44);         System.out.println(ppc.getName() + "," + ppc.getAge());         ppc.eat();         ppc.teach();         ppc.speak();           BaketballPlayer bbp = new BaketballPlayer("C++", 30);         System.out.println(bbp.getName() + "," + bbp.getAge());         bbp.eat();         bbp.study();           BaketballCoach bbc = new BaketballCoach();         bbc.setName("++C");         bbc.setAge(50);         System.out.println(bbc.getName() + "," + bbc.getAge());         bbc.eat();         bbc.teach();     }   }

　　

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package day2.yubaby04;   public interface SpeakEnglish {   //    public abstract void speak();     void speak();   }

　　

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package day2.yubaby04;   //抽象人类 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(); }

　　

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package day2.yubaby04;   //抽象运动员类 public abstract class Player extends Person{       public Player() {     }       public Player(String name, int age) {         super(name, age);     }       public abstract void study(); }

　　

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package day2.yubaby04;   //抽象教练类 public abstract class Coach extends Person{       public Coach() {     }       public Coach(String name, int age) {         super(name, age);     }       public abstract void teach(); }

　　

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package day2.yubaby04;   public class BaketballCoach extends Coach{       public BaketballCoach() {     }       public BaketballCoach(String name, int age) {         super(name, age);     }       @Override     public void teach() {         System.out.println("篮球教练教打篮球");     }       @Override     public void eat() {         System.out.println("篮球教练吃篮球吗");     } }

　　

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package day2.yubaby04;   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("乒乓球教练教打乒乓球");     }       @Override     public void teach() {         System.out.println("乒乓球教练吃乒乓球吗");     }       @Override     public void speak() {         System.out.println("乒乓球教练说英语");     } }

　　

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package day2.yubaby04;   public class BaketballPlayer extends Player{       public BaketballPlayer() {     }       public BaketballPlayer(String name, int age) {         super(name, age);     }       @Override     public void eat() {         System.out.println("篮球运动员吃乒乓球吗");     }       @Override     public void study() {         System.out.println("篮球运动员学习打篮球");     }     }

　　

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package day2.yubaby04;   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("乒乓球运动员吃篮球吗");     }       @Override     public void study() {         System.out.println("乒乓球运动员学习打乒乓球");     }         @Override     public void speak() {         System.out.println("乒乓球运动员说英语");     } }