How to maximaze a window correct?

Hello Guys!

I need to maximize a JFrame.
But the problem is that it overlays the desktop bar with applications at the bottom of the screen.

I would like to have the bar with the applications visible.

If you test this code In hope you see my problem:

import javax.swing.JFrame;
import javax.swing.JPanel;


public class TestFrame
{
    private static JFrame frame;
   
    public static JFrame getFrame()
    {
        return frame;
    }

    private static void setFrame(JFrame jFrame)
    {
        frame = jFrame;
    }
   
    private static void createAndShowGUI()
    {
        setFrame(new JFrame("Test"));   
        getFrame().setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        getFrame().setResizable(false);
        getFrame().pack();
        getFrame().validate();
        getFrame().setVisible(true);
        getFrame().setExtendedState(getFrame().getExtendedState() | JFrame.MAXIMIZED_BOTH);
        getFrame().getContentPane().add(new JPanel());   
    }
   
    public static void main(String[] args)
    {
        javax.swing.SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                createAndShowGUI();
            }
        });
    }
}


Best regards
Fredrik