class Mar23 {
	public static void main(String[] args) {

		try {
			Box b1 = new Box();
			System.out.println(b1.toString());

			//b1.height = 10;
			b1.setHeight(10);
			System.out.println(b1);

			Box b2 = new Box(7, 2, 13, 23);
			System.out.println(b2);

			//Box b3 = new Box(3, -5, 7, 15);
			//System.out.println(b3);

			//b1.width = -5;
			b1.setWidth(-5);
			System.out.println(b1);

		}
		catch (IllegalArgumentException e) {
			System.out.println(e);
			System.out.println("exiting gracefully");
			System.exit(1);
		}

		// do something else if no exception
		
	}
}