class BallTest {
	
	public static void main(String[] args){
		Ball b1;
		Ball b2 = new Ball("Red");
		b2.move(5,10);
		System.out.println(b2);
		b1 = b2;
		b1.move(3,2);
		System.out.println(b2);
		b1 = new Ball("Green");
		b1.move(2,4);
		System.out.println(b2);
		Ball b3 = new Ball("Blue");
		b3.move(10,20);
		Ball b4 = new Ball("Pink");
		b4.move(10,20);
		System.out.println(" b3 == b4 " + (b3 == b4));
		System.out.println(" b3.equals(b4) " + 
			b3.equals(b4) );
	}

}