Problems whit the LookAndFeel

Question

Hi, i'm creating a GUI using Netbeans (windows xp), I want to use the cross plataform look and feel, so i write this code:
public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                   UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
                } catch(Exception e) {
                System.out.println("Couldn't use that look and feel.");
                setDefaultLookAndFeelDecorated(true);
                new NumeroCiclos().setVisible(true);
    }It work's OK, this is the picture of the window:
http://i55.photobucket.com/albums/g143/joserafa83/MetalLnF.jpg
But when i use the JOptionPane the look and feel is like the windows xp:
http://i55.photobucket.com/albums/g143/joserafa83/errorLnF.jpg
String time = jTextTime.getText();
        String freq = jTextFrequency.getText();
        double t = 0;
       try
            t = Double.parseDouble(time);
       catch(NumberFormatException e)
          JOptionPane.showMessageDialog(null,"cuidado","Error",JOptionPane.ERROR_MESSAGE);
           jTextTime.requestFocus();
       }        What can I do to fix this look and feel problem??
Thanks

Answer 1

When you change the look and feel I think you have to update the Component tree with
SwingUtilities.updateComponentTreeUI(Component c)or the component you changed the look and feel of will have the new look and feel, and some or all of its child components will retain their previous look and feel. I think as of either JDK 5 or 6, the default look and feel is the native one returned by
UIManager.getSystemLookAndFeelClassName()(I'm not completely sure about this) which means until you make the call above, some or all of the child components will have the native look and feel and the component itself will have the cross platform look and feel.
For more information about the Swing architecture, visit Sun's "A Swing Architecture Overview" at:
http://java.sun.com/products/jfc/tsc/articles/architecture/