import javax.swing.*; public class Main { public static void main(String[] args) { Box box = new Box("Tank"); box.setSize(600, 600); Tank tank = new Tank(box); box.addObject(tank); TankEvent controll = new TankEvent(tank); box.addKeyListener(controll); /* game loop */ while(true) { controll.keyMonitoring(); box.step(); box.repaint(); try { Thread.sleep(15); } catch(InterruptedException e) { break; } } } }