import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
public class Main {
public static void main(String[] args) {
JFrame f = new JFrame();
f.setSize(800, 600);
f.setLocationRelativeTo(null);
JTabbedPane p = new JTabbedPane();
p.addTab("T1", new JPanel());
p.addTab("T2", new JPanel());
p.addTab("T3", new JPanel());
p.addChangeListener(e -> {
System.out.println("" + p.getSelectedIndex());
// Index starts at 0, so Index 2 = Tab3
if (p.getSelectedIndex() == 2) {
// do your stuff on Tab 3
}
});
f.add(p);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}
【jtabbedpane】
