Java Swing - 如何告诉JTabbedPane中的选项卡是否为活动选项卡

import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTabbedPane;
import javax.swing.SwingConstants;

public class Main {
  public static void main(String[] args) {
    JTabbedPane tabbedPane = new JTabbedPane();
    for (int i = 0; i < 5; i++) {
      tabbedPane.add("Tab " + i,
          new JLabel("Label " + i, SwingConstants.CENTER));
    }

    tabbedPane.getModel().addChangeListener(e-> {
        JLabel label = (JLabel) tabbedPane.getSelectedComponent();
        System.out.println(label.getText());
    });

    tabbedPane.setPreferredSize(new Dimension(500, 300));

    JFrame frame = new JFrame();
    frame.getContentPane().add(tabbedPane);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setVisible(true);
  }
}