JDialog chamando outro JDialog

package testes;

import java.awt.Button;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;

public class Teste10 extends JFrame implements ActionListener {

	/**
	 * 
	 */
	private static final long serialVersionUID = 4884940064914957907L;

	private Button botao;

	private static int num;
	
	public Teste10() {

		this.botao = new Button("Ok");
		this.botao.setBounds(10, 10, 100, 25);
		this.botao.addActionListener(this);

		this.getContentPane().add(this.botao);

		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setBounds(10, 10, 150, 100);
		this.setLayout(null);
	}

	public Button getBotao() {
		return botao;
	}

	public void setBotao(Button botao) {
		this.botao = botao;
	}

	public static void main(String[] args) {
		new Teste10().setVisible(true);
	}

	public void actionPerformed(ActionEvent e) {
		getDialog();
	}
	
	
	private JDialog getDialog(){
		
		JDialog dialog = new JDialog(this, false);	
		dialog.setTitle("Dialog " + num);
		dialog.setBounds(10, 10, 200, 100);
		
		JButton bot = new JButton("Outro JDialog");
		bot.setBounds(10, 10, 150, 25);
		bot.addActionListener(new ActionListener(){
			@Override
			public void actionPerformed(ActionEvent e) {
				num++;
				getDialog();
			}
		});
		dialog.add(bot);
		dialog.setLayout(null);
		dialog.setVisible(true);
		
		return dialog;	
	}
}