Agregar botones a las pestañas de un JTabbedPane

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;
/**
 * @author leyer
 */
public class JTapPe extends JFrame implements ActionListener{
	private static final long serialVersionUID = 1L;

	public static final short _WIDTH =500;
	public static final short _HEIGTH=500; 
	
	protected JTabbedPane  tabbedPane=null;
	private JButton        button   =null;
	private class PANEL extends JPanel implements ActionListener{
	private static final long serialVersionUID = 1L;
	
	private String  title  =null;
	private JButton button =null;
	private JTapPe  tapPe  =null;
	public PANEL(String title, JButton tabButton, JTapPe jTapPe){
		this.title =title;
		this.button=tabButton;
		this.tapPe =jTapPe;
		button.addActionListener(this);
		}
	@Override
	public void actionPerformed(final ActionEvent e) {
		tapPe.removeTap(title);
		}
	}
	public JTapPe() {
		this.setSize(_WIDTH,_HEIGTH);
		tabbedPane=new JTabbedPane();	
		button=new JButton("Add");
		button.addActionListener(this);
		getContentPane().add(tabbedPane,BorderLayout.CENTER);
		getContentPane().add(button,BorderLayout.NORTH);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	public static void main(String[] args) {
		SwingUtilities.invokeLater(new Runnable() {
			@Override public void run() {	
				new JTapPe().setVisible(true);
			}
		});
	}
	public boolean removeTap(String title) {
		int i = tabbedPane.getTabCount();
		for (int index = 0; index < i; index++) {
			String temp = tabbedPane.getTitleAt(index);
			if (temp.equals(title)) {
				tabbedPane.removeTabAt(index);
				return true;
			}
		}
		return false;
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		  JButton tabButton = new JButton("Cerrar");
		  String title=String.valueOf(new Random().nextInt(101));
		  PANEL p=new PANEL(title,tabButton,this);
	      tabbedPane.addTab(title,null, p);
	      tabButton.setPreferredSize(new Dimension(120,20));
	      tabButton.setContentAreaFilled(false);
	      JPanel pnl = new JPanel();
	      pnl.setOpaque(false);
	      JLabel label=new JLabel(title);
	      pnl.add(label);
	      pnl.add(tabButton);
	      tabbedPane.setTabComponentAt(tabbedPane.getTabCount() - 1, pnl);
	      tabbedPane.setSelectedIndex(tabbedPane.getTabCount() - 1);
	}
}