private void setLayout() { GroupLayout layout = new GroupLayout(dialog.getContentPane()); dialog.getContentPane().setLayout(layout); dialog.setResizable(true); layout.setAutoCreateContainerGaps(true); layout.setHorizontalGroup(layout.createParallelGroup().addComponent(tabbedPane)); layout.setVerticalGroup(layout.createParallelGroup().addComponent(tabbedPane)); layout.setHonorsVisibility(tabbedPane, true); // TODO set color here dialog.getContentPane().setBackground(new Color(0x132638)); dialog.validate(); dialog.repaint(); }