Java Basic(61)-Simple Polymorphic Program

public class Fish extends Animal{

public void noise(){

System.out.println("Click Slurk");

}

}

public class Animal {

public void noise(){

System.out.println("Animal dont make noise");

}

}

public class Dog extends Animal{

public void noise(){

System.out.println("Ruff");

}

}

class apples{

public static void main(String[] args){

Animal[] theList = new Animal[2];

Dog d = new Dog();

Fish f = new Fish();

theList[0]=d;

theList[1]=f;

for(Animal x: theList){

x.noise();

}

}

}

這是運行時的結果:

Ruff 

Click Slurk