window resizing trouble!

[jeremytaffy]

I have an application that loads in a small window. When a selection is made, I clear the small window, and want to make it full screen sized, with a big button filling most of the screen. I have been able to resize the window, but the button only fills the size of the area that was originally there. I cant figure it out. code included

thanks in advance
j

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.border.*;
import java.io.*;
import javax.swing.filechooser.*;
import java.lang.*;

public class go extends JPanel {
JLabel label;
JFrame frame1;
String simpleDialogDesc = "The choices:";
JLabel space = new JLabel(""
final JButton yesbutton = new JButton("Go"
final JButton yesbutton2 = new JButton("Go"

final JButton voteButton = new JButton("Choose Wisely"
ButtonGroup selection = new ButtonGroup();
JRadioButton rbutton1 = new JRadioButton("A", true);
JRadioButton rbutton2 = new JRadioButton("B", false);
public go(final JFrame frame) {


yesbutton.setBackground(Color.green);
yesbutton.setFont(new Font("sansserif", Font.PLAIN, 600));
yesbutton2.setBackground(Color.green);
yesbutton2.setFont(new Font("sansserif", Font.PLAIN, 600));
final JLabel title = new JLabel(" Click the \"Choose\" button"
+ " once you have selected a choice. ",
JLabel.CENTER);
selection.add(rbutton1);
selection.add(rbutton2);
JLabel label2 = new JLabel(" "
final JPanel buttons = new JPanel();
GridLayout flow1 = new GridLayout(9,1);
buttons.setLayout(flow1);
buttons.add(rbutton1);
buttons.add(rbutton2);
buttons.add(voteButton);

label = new JLabel("", JLabel.CENTER);


// Set the layout.
setLayout(new BorderLayout());
add(title, BorderLayout.NORTH);

add(buttons, BorderLayout.CENTER);
add(label2, BorderLayout.SOUTH);
add(label2, BorderLayout.WEST);

////////////////////////////////
voteButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (rbutton1.isSelected()){
removeAll();
setVisible(false);
setVisible(true);
//System.exit(0);
//frame1.setVisible(true);

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
int wdFrame = screenSize.width;
int hgFrame = screenSize.height;
System.out.println(wdFrame);
System.out.println(hgFrame);
int space = 5;
//frame.setSize(wdFrame,hgFrame);
frame.setSize(wdFrame,hgFrame);
frame.setBounds(5,5,wdFrame,hgFrame);
setLayout(null);
yesbutton.setBounds(5,5,900, 900);
add(yesbutton);
setVisible(false);
setVisible(true);
}
}
});
}
public static void main(String[] args) {
final JFrame frame = new JFrame("Go"

Container contentPane = frame.getContentPane();
contentPane.setLayout(new GridLayout(1,1));
contentPane.add(new go(frame));

// Exit when the window is closed.
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.pack();
frame.setVisible(true);
}
}