Botão criar botão

Programação Java
#1

Como eu faço para quando eu clicar em um botão, este botão criar outro botão em outro panel? Fiz o seguinte mas não funciona:

class AgasalhosListener implements ActionListener {

	public void actionPerformed(ActionEvent event) {
	    JButton agasalho_1_button = new JButton("Agasalho 1");
	    panel3.add(agasalho_1_button);
	}

}

public class Principal {

JFrame frame;
JPanel panel;
JPanel panel2;
JPanel panel3;
JPanel panel4;
JPanel panel5;

public static void main(String[] args) {
	Principal gui = new Principal();
	gui.go();
}

public void go() {
	
	frame = new JFrame();
	panel = new JPanel();
	panel2 = new JPanel();
	panel3 = new JPanel();
	panel4 = new JPanel();
	panel5 = new JPanel();
            ...
           JButton agasalhos = new JButton("Agasalhos");
       agasalhos.addActionListener(new AgasalhosListener());
       panel4.add(agasalhos);
           ...

}

#2 


import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class ActionL {
	
	JLabel label;
	JButton b1;
	JPanel p1;
	
	public ActionL() {
		
		JFrame frame = new JFrame();

		label = new JLabel( "\tPROGRAM BUTTON, PANEL ONE!" );
		
		b1 = new JButton( "ButtonOne" );
		b1.addActionListener( 
			new ActionListener() {
				public void actionPerformed( ActionEvent e ) {
					ActionL2 ac = new ActionL2();
					ac.pop();
				}
			}
		);
		
		p1 = new JPanel();
		
		p1.add( label );
		p1.add( b1 );
		
		frame.add( p1 );
		
		frame.setSize( 400, 400 );
		frame.setVisible( true );
		frame.setLocationRelativeTo( null );
		frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
	}
	
	class ActionL2 {
		
		public ActionL2() {}
		
		public void pop() {
			
			JFrame frame2 = new JFrame();
					
			JLabel label2 = new JLabel( "\tPROGRAM FRAME TWO, AFTER OF THE BUTTON ONE!" );
						
			JButton b2 = new JButton( "ButtonTwo" );
			b2.addActionListener( 
				new ActionListener() {
					public void actionPerformed( ActionEvent e ) {
						System.exit( 0 );
					}
				}
			);
			
			JPanel panel2 = new JPanel();
						
			panel2.add( label2 );
			panel2.add( b2 );
			
			frame2.add( panel2 );
			frame2.setSize( 400, 400 );
			frame2.setVisible( true );
			frame2.setLocationRelativeTo( null );
			frame2.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
		}
	}
}


public class MyButtonPanel {
    
    public static void main(String[] args) {
    	
    	ActionL app = new ActionL();
    }
}
#3