tabbedPane.setBorder(BorderFactory.createEmptyBorder(12, 12, 12, 12));
getContentPane().add(tabbedPane, BorderLayout.CENTER);
setSize(new Dimension(800, 450));
tabbedPane.setBorder(BorderFactory.createEmptyBorder(12, 12, 12, 12));
getContentPane().add(tabbedPane, BorderLayout.CENTER);
setSize(new Dimension(800, 450));