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copied!<p>Here's one approach, shown below. A more flexible approach using <code>Action</code> is referenced <a href="https://stackoverflow.com/questions/4337838/jinternalframe-to-front-and-focussed/4338784#4338784">here</a>.</p> <p>Addendum: Reviewing your code, you should let the various layout managers and component preferred sizes do more of the work, as shown. In particular, <code>this.setPreferredSize()</code> is done for demonstration purposes. In a real application, you would restore user size and location preferences.</p> <p><img src="https://i.stack.imgur.com/ybKM6.png" alt="Desktop pane with internal frames"></p> <pre><code>package overflow; import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JLabel; import javax.swing.JLayeredPane; import javax.swing.JPanel; import javax.swing.JTabbedPane; /** @see https://stackoverflow.com/posts/6514889 */ public class InternalFrame extends JFrame { JButton openButton; JLayeredPane desktop; JInternalFrame internalFrame; public InternalFrame() { super("Click button to open internal frame with two tabs."); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.setPreferredSize(new Dimension(400, 400)); openButton = new JButton("Open"); JPanel p = new JPanel(); p.add(openButton); this.add(p, BorderLayout.SOUTH); openButton.addActionListener(new OpenListener()); desktop = new JDesktopPane(); this.add(desktop, BorderLayout.CENTER); this.pack(); this.setLocationRelativeTo(null); } class OpenListener implements ActionListener { private static final int DELTA = 40; private int offset = DELTA; public void actionPerformed(ActionEvent e) { internalFrame = new JInternalFrame( "Internal Frame", true, true, true, true); internalFrame.setLocation(offset, offset); offset += DELTA; internalFrame.add(createTabbedPane()); desktop.add(internalFrame); internalFrame.pack(); internalFrame.setVisible(true); } } private JTabbedPane createTabbedPane() { JTabbedPane jtp = new JTabbedPane(); createTab(jtp, "One"); createTab(jtp, "Two"); return jtp; } private void createTab(JTabbedPane jtp, String s) { jtp.add(s, new JLabel("TabbedPane " + s, JLabel.CENTER)); } public static void main(String args[]) { EventQueue.invokeLater(new Runnable() { @Override public void run() { InternalFrame myInternalFrame = new InternalFrame(); myInternalFrame.setVisible(true); } }); } } </code></pre>

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