import javax.swing.JFrame; /** * */ /** * @author Donald Yessick * */ public class Lab15 extends CannonBall { public static void main(String[] args) { Lab15 cannonBall = new Lab15(); JFrame frame = cannonBall.getWindow(); frame.setVisible(true); cannonBall.shoot(); } public int getXCannonBall(int time){ return 250+time*10; } public int getYCannonBall(int time){ return 350-time*3; } }