class Animal{ void cry(){}
}
class Dog extends Animal{
void cry(){
System.out.println("wang!wang!......");
}
}
class Cat extends Animal{
void cry(){
System.out.println("miao~~miao~~...");
}
}
public class Example5_9{
public static void main(String arg[]){
Animal animal;
animal=new Dog();
animal.cry();
animal=new Cat();
animal.cry();
}
}
