巩固多态类运用

package 人类;
class Person {
 String name;
 public Person(String name) {
  this.name=name;
 }
 public void speak(){
  System.out.println(name+"会说话");
 }
}
  class  Chinese extends Person {
   public  Chinese(String name) {
    super( name);
   }
  public void speak() {
   System.out.println(name+"会说中国话");
  }
}
  class American extends Person{
   public American(String name) {
    super(name);
   }
   public void speak() {
    System.out.println(name+"会说英语！");
   }
  }

 

public class Domea {
  public static void main(String[]args) {
   Person c = new Chinese("中国人");
   Person a = new American("美国人");
   c.speak();
   a.speak();
  }
}