Java Swing - 如何将图像图标添加到JTabbedPane标题选项卡

import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JTabbedPane;
import javax.swing.UIManager;

public class Main extends JPanel {
  JPopupMenu menu = new JPopupMenu();
  public Main() {
    Icon icon = UIManager.getIcon("html.pendingImage");
    JTabbedPane jtb = new JTabbedPane();

    JPanel jplInnerPanel1 = createInnerPanel("Tab 1: Tooltip and Icon");
    jtb.addTab("One", icon, jplInnerPanel1, "Tab 1");
    jtb.setSelectedIndex(0);

    JPanel jplInnerPanel2 = createInnerPanel("Tab 2: Icon only");
    jtb.addTab("Two", icon, jplInnerPanel2);

    JPanel jplInnerPanel3 = createInnerPanel("Tab 3: Tooltip and Icon");
    jtb.addTab("Three", icon, jplInnerPanel3, "Tab 3");

    JPanel jplInnerPanel4 = createInnerPanel("Tab 4: Text only");
    jtb.addTab("Four", jplInnerPanel4);

    menu.add(new JMenuItem("Item 1"));
    menu.add(new JMenuItem("Item 2"));

    JLabel tab4Label = new JLabel();
    tab4Label.setText("Four");
    jtb.setTabComponentAt(3, tab4Label);
    tab4Label.addMouseListener(new MouseAdapter() {
      @Override
      public void mouseReleased(MouseEvent e) {
        maybeShowPopup(e);
      }
      @Override
      public void mousePressed(MouseEvent e) {
        maybeShowPopup(e);
      }

      private void maybeShowPopup(MouseEvent e) {
        jtb.getModel().setSelectedIndex(3);
        if (e.isPopupTrigger()) {
          menu.show(e.getComponent(), e.getX(), e.getY());
        }
      }
    });
    setLayout(new GridLayout());
    add(jtb);
  }
  private JPanel createInnerPanel(String text) {
    JPanel jplPanel = new JPanel();
    jplPanel.add(new JLabel(text));
    return jplPanel;
  }

  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(new Main());
    frame.pack();
    frame.setSize(400, 125);
    frame.setVisible(true);
  }
}