Java tutorial
import javax.swing.DebugGraphics; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.RepaintManager; public class DebugGraphicsDemo { public static void main(String[] a) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JButton bn = new JButton(); RepaintManager repaintManager = RepaintManager.currentManager(bn); repaintManager.setDoubleBufferingEnabled(false); bn.setDebugGraphicsOptions( DebugGraphics.BUFFERED_OPTION | DebugGraphics.FLASH_OPTION | DebugGraphics.LOG_OPTION); frame.add(bn); frame.setSize(300, 300); frame.setVisible(true); frame.add(bn); } }