Cat.java

public class Cat extends Pet {


	public Cat(){

	}

	public void talk () {
		System.out.println("purr");
	}

}

Dog.java

public class Dog extends Pet {

	public Dog(){
		
	}

	public void talk () {
		System.out.println("bark");
	}

}

Pet.java

public class Pet extends Projectile {
	private String color;
	private int age;

	public Pet(){
		String color = "Black";
		int age = 5;
	}

	public Pet(String c, int a){
		String color = c;
		int age = a;
	}

	public void jump () {
		System.out.println("Jump");
	}

	public void eat () {
		System.out.println("Eat");
	}

}

Projectile.java

public class Projectile {
	private int weight;
	private int hardness;
	
	public Projectile() {
		weight = 8;
		hardness = 5;
	}
	
	public Projectile(int w, int h) {
		weight = w;
		hardness = h;
	}
	
	public void toss() {
		System.out.println("You cruel bastard");
		if (weight > 5) System.out.println();
	}
	
}

Runner.java

public class Runner {

	public static void main(String[] args){
		Cat c = new Cat();
		Dog d = new Dog();
		d.talk();
		c.talk();
		d.eat();
		c.eat();
		d.toss();
	}

}