having issue with validate ().. please help

[atrodeyo]

I am trying to solve this for so long but got stuck for months now. Started with groupLayout but had no Help at this fourm. Now I tried with AbsoluteLayout and still I am having the same issue. Reasons for using those layout is because I need to be able to position components wherever I want to. Here is my Code. Please someone help me.

When I Press the button the textfield suppose to appear but it does not appear. What am I doing wrong here? Please help. I am stuck with this for a while now.

import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;


public class tabs extends JFrame {

	/**
	 * Create the panel.
	 */
	JFrame myFrame = null;
	public static void main (String [] args) {
		new tabs ();
	}
	public tabs() {

		JTabbedPane tp = new JTabbedPane ();
		getContentPane().add (tp);
		
		tp.addTab("tab1", new TestAbsoluteLayer1());
		tp.addTab("tab2", new TestAbsoluteLayer1());

		
		setPreferredSize(new Dimension(526, 483));
		pack();
		setVisible(true);
		
	}

}

import javax.swing.JPanel;
import java.awt.BorderLayout;
import javax.swing.JTextField;



public class TestAbsoluteLayer2 extends JPanel {
	private JTextField textField;

	/**
	 * Create the panel.
	 */
	public TestAbsoluteLayer2() {
		setLayout(null);
		
		JPanel panel = new JPanel();
		panel.setBounds(149, 31, 165, 21);
		add(panel);
		panel.setLayout(new BorderLayout(0, 0));
		
		textField = new JTextField();
		panel.add(textField, BorderLayout.NORTH);
		textField.setColumns(10);

	}

}

import javax.swing.JPanel;
import java.awt.BorderLayout;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;


public class TestAbsoluteLayer1 extends JPanel {

	/**
	 * Create the panel.
	 */
	public TestAbsoluteLayer1() {
		setLayout(null);
		
		JPanel panel = new JPanel();
		panel.setBounds(117, 176, 98, 29);
		add(panel);
		panel.setLayout(new BorderLayout(0, 0));
		
		JButton btnNewButton = new JButton("New button");
		btnNewButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {
				btnActionPerformed (arg0);
			}
		});
		panel.add(btnNewButton, BorderLayout.CENTER);

	}
	
	private void btnActionPerformed (ActionEvent e) {
		removeAll ();
		TestAbsoluteLayer2 abs2 = new TestAbsoluteLayer2 ();
		add (abs2, null);
		validate ();
	}

}

[atrodeyo]

can anyone help me with this or atleast let me know where I can find some help about make this work?