// show it is possible to add any component to the bar
JTree tree = new JTree();
outlook.addTab("A JTree", outlook.makeScrollPane(tree));
outlook.addTab("Disabled", new JButton());
outlook.setEnabledAt(3, false);
outlook.setAllTabsAlignment(alignment);
JPanel panel = new JPanel(new PercentLayout(PercentLayout.HORIZONTAL, 3));
panel.add(outlook, "100");