public void beginExecution() { if (cam == null) { int numBuffers = 2; env = GraphicsEnvironment.getLocalGraphicsEnvironment(); device = env.getDefaultScreenDevice(); // MultiBufferTest test = new MultiBufferTest(numBuffers, device); try { GraphicsConfiguration gc = device.getDefaultConfiguration(); mainFrame = new Frame(gc); mainFrame.setUndecorated(true); mainFrame.setIgnoreRepaint(true); device.setFullScreenWindow(mainFrame); if (device.isDisplayChangeSupported()) { chooseBestDisplayMode(device); } mainFrame.createBufferStrategy(numBuffers); bufferStrategy = mainFrame.getBufferStrategy(); } catch (Exception e) { e.printStackTrace(); } } }