poly.java

class Animal {
    public void animalSound() {
      System.out.println("The animal makes a sound");
    }
  }
  
  class Pig extends Animal {
    public void animalSound() {
      System.out.println("The pig says: wee wee");
    }
  }
  
  class Dog extends Animal {
    public void animalSound() {
      System.out.println("The dog says: bow wow");
    }
  }


  class OuterClass {
    int x = 10;
  
    class InnerClass {
      int y = 5;
    }
  }
public class poly {
    public static void main(String[] args) {
        Animal myAnimal = new Animal();  // Create a Animal object
        Animal myPig = new Pig();  // Create a Pig object
        Animal myDog = new Dog();  // Create a Dog object
        myAnimal.animalSound();
        myPig.animalSound();
        myDog.animalSound();

        OuterClass myOuter = new OuterClass();
        OuterClass.InnerClass myInner = myOuter.new InnerClass();
        System.out.println(myInner.y + myOuter.x);
    
      }
}