class Animal{
	public void move(){
		System.out.println("Animals can move.");
	}
	public void grow(){
		System.out.println("Animals can grow.");
	}
}

class Dog extends Animal{
	@Override       // <- I added this annotation, not eclipse 
	public void move(){
		System.out.println("Dogs can walk and run.");
	}
	public void bark(){
		System.out.println("Dogs can bark.");
	}
}



public class TestDog {

	public static void main(String[] args) {
		// 
		Animal a = new Animal(); 		
		Animal b = new Dog();			
		
		a.move();						
		b.move();						// executes the method in Dog class;
		b.grow();
		
	}

}