This is a simple test case for you to reproduce the flashing for opening a Dialog. It's basically the same for JMenus.
import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.UIDefaults; import javax.swing.UIManager; import javax.swing.UIManager.LookAndFeelInfo; import javax.swing.plaf.ColorUIResource; import java.awt.Color; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class TestDarkNimbus { public static void main(String[] args) throws Exception { for(LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()){ if(info.getName().startsWith("Nimbus")){ System.out.println("Setting Look & Feel to " + info.getName()); UIManager.setLookAndFeel(info.getClassName()); break; } } UIDefaults d = UIManager.getDefaults(); d.put("control", new ColorUIResource(54, 54, 54)); d.put("text", new ColorUIResource(214, 214, 214)); d.put("nimbusBlueGrey", new ColorUIResource(44, 44, 44)); d.put("nimbusBase", new ColorUIResource(54, 54, 54)); d.put("nimbusFocus", new Color(71, 85, 101)); d.put("nimbusLightBackground", new ColorUIResource(54, 54, 54)); d.put("nimbusSelectionBackground", new ColorUIResource(51, 65, 81)); d.put("nimbusSelection", new ColorUIResource(51, 65, 81)); final JFrame frame = new JFrame(TestDarkNimbus.class.getSimpleName()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JButton button = new JButton("Test Dialog Flashing"); button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { JOptionPane.showMessageDialog(frame.getContentPane(), "Flash !!!!!!!!!!!!", "Flash demo", JOptionPane.INFORMATION_MESSAGE); } }); frame.getContentPane().add(button); frame.pack(); frame.setLocation(500, 500); frame.setVisible(true); } } On Mon, Jan 6, 2014 at 6:49 PM, Robert Krüger <krue...@lesspain.de> wrote: > Hi, > > we are using a customized Nimbus L&F (the customization is mostly > color changes) with dark backgrounds. Since we migrated our product > from Apple JDK 6 to OpenJDK 8 each JMenu or JDialog opens and first > draws a white rectangle that is then quickly replaced by the real > content, which has a rather unprofessional feel. > > Has anyone had a similar problem and maybe a workaround other than not > having a dark background? Is there a known Jira issue I can follow? > > I am currently running build 121 in development on Mac OS 10.8. > > Thanks, > > Robert