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Java Swing - 如何在JTabbedPane中添加标签，如google chrome

jtabbedpane 【jtabbedpane】
我们想知道如何在JTabbedPane中添加标签，如google chrome。
代码展示 运行结果 
import java.awt.BorderLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class Main {
  public static void main(String[] args) {
    JTabbedPane tab = new JTabbedPane();
    tab.addTab("A", new JPanel());
    tab.addTab("+", new JPanel());
    tab.getModel().addChangeListener(new ChangeListener() {
      private int lastSelected;
      private boolean ignore = false;

      @Override
      public void stateChanged(ChangeEvent e) {
        if (!ignore) {
          ignore = true;
          try {
            int selected = tab.getSelectedIndex();
            String title = tab.getTitleAt(selected);
            if ("+".equals(title)) {
              JPanel pane = new JPanel();
              tab.insertTab("Tab" + (tab.getTabCount() - 1), null, pane, null,
                  lastSelected + 1);
              tab.setSelectedComponent(pane);
            } else {
              lastSelected = selected;
            }
          } finally {
            ignore = false;
          }
        }
      }
    });
    final JButton btn = new JButton("Add");
    btn.addActionListener(e->System.out.println(tab.getTabCount()));

    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.add(tab);
    frame.add(btn, BorderLayout.SOUTH);
    frame.pack();
    frame.setVisible(true);
  }

}