Java 抽象類別

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 1 package com.qugeng.jdk; 2  3 public class MethodDemo { 4     public static void main(String[] args) { 5         AbsDemo a = new AbsDemo(); 6         a.say(); 7         a.print(); 8     } 9 }10 11 abstract class  Abs{12     private int age;13     public void tell(){14     }15     public abstract void say();16     public abstract void print();17 }18 19  /**20   * 子類必須重寫父類的方法21   * @author Administrator22   *23   */24  class AbsDemo extends Abs25 {26     public void say() {27     }28     public void print(){29         30     }31 }32  

 1 package com.qugeng.jdk; 2  3 public class MethodDemo { 4     public static void main(String[] args) { 5         A a = new A(); 6         a.tell(); 7         System.out.println(); 8     } 9 }10 11 interface Inter212 {13     public abstract  void say();14     15 }16 17 abstract class Abs1{18     public abstract void print();19 }20 21 interface Inter1{22     23     public static final int AGE = 100;24     public abstract void tell();25 }26 27 28  class A extends Abs1 implements Inter1,Inter2{29     public void tell(){30         31     }32     public void say()33     {34         35     }36     public void print()37     {38         39     }40 }

Java 抽象類別