nimbus as defalut

I'm using java 7 update 17 and netBeans IDE 7.3 I would to set the nimbus as default for every GUI project but oracle website instruction not working .

how to set nimbus at default for every project ?

I write my code manually without use palette , or drag and drop .

and this instruction does not work http://docs.oracle.com/javase/tutorial/uiswing/lookandfeel/nimbus.html

Solution

The following called at the start of the main

try {
    for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
        System.out.println("LAF: " + info.getName());
        if ("Nimbus".equals(info.getName())) {
            UIManager.setLookAndFeel(info.getClassName());
            //break;
        }
    }
} catch (ClassNotFoundException | InstantiationException
    | IllegalAccessException | javax.swing.UnsupportedLookAndFeelException ex) {
    Logger.getLogger(MainFrame.class.getName()).log(Level.SEVERE, null, ex);
}

gave

LAF: Metal
LAF: Nimbus
LAF: CDE/Motif
LAF: Windows
LAF: Windows Classic

It's copied from the code of the main of a generated JFrame form in NetBeans.

After that

    EventQueue.invokeLater(new Runnable() {
        @Override
        public void run() {
            mainFrame.setVisible(true);
        }
    });

And I guess there it must be going awry.

Maybe you have some command line options, system java settings, selecting a LAF already and "extending" Nimbus (Plastic or so)?