get current tab index java swing
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
frame.setBounds(0, 0, 300, 400);
frame.setLayout(null);
final JTabbedPane tabbedPane = new JTabbedPane();
tabbedPane.addTab("One", new JPanel());
tabbedPane.addTab("Two", new JPanel());
tabbedPane.addTab("Three", new JPanel());
tabbedPane.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
System.out.println("Tab: " + tabbedPane.getSelectedIndex());
}
});
tabbedPane.setBounds(0, 0, 300, 400);
frame.add(tabbedPane);
frame.setVisible(true);
}