1回答

• 

  Haley0724

  2017-08-05 18:02:41

  public class AbstDemo {

  public static void main(String[] args) {

      Person p1 = new Chinese();

      Person p2 = new American();

      p1.say();

      p2.say();

      }

  }

  
  

  abstract class Person{

  abstract void say();

  }

  
  

  class Chinese extends Person{

  void say() {

      System.out.println("中国人说汉语");

      }

  }

  
  

  class American extends Person{

  void say() {

      System.out.println("美国人说英语");

      }

  }

  
  

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