Expand and Shrink

hey guys I am writing a program using gui's that is supposed to expand and shrink the JFrame that it is in.
Here is my code why doesn't this work?
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class expandAndShrink extends JFrame implements ActionListener
JButton expandButton ;
JButton shrinkButton ;
// constructor for TwoButtons
public expandAndShrink()
    expandButton = new JButton("Expand");
    shrinkButton = new JButton("Shrink");
    expandButton.setActionCommand( "expand" );   // set the command
    shrinkButton.setActionCommand( "shrink" ); // set the command
    getContentPane().setLayout( new FlowLayout() );
    getContentPane().add( expandButton );
    getContentPane().add( shrinkButton );
    expandButton.addActionListener( this );
    shrinkButton.addActionListener( this );
public void actionPerformed( ActionEvent evt)
    // check which command has been sent
    if ( evt.getActionCommand().equals( "expand" ) ){
      expandAndShrink.setSize(220,170 );
    else {
     expandAndShrink.setSize(180,130);
public static void main ( String[] args )
    expandAndShrink demo = new expandAndShrink() ;
    WindowQuitter wquit = new WindowQuitter();
    demo.addWindowListener( wquit );
    demo.setSize( 200, 150 );
    demo.setVisible( true );
class WindowQuitter extends WindowAdapter
public void windowClosing( WindowEvent e )
    System.exit( 0 );
}

change this code
public void actionPerformed( ActionEvent evt)
    // check which command has been sent
    if ( evt.getActionCommand().equals( "expand" ) ){
      expandAndShrink.setSize(220,170 );
    else {
     expandAndShrink.setSize(180,130);
}to this
public void actionPerformed( ActionEvent evt)
    // check which command has been sent
    if ( evt.getActionCommand().equals( "expand" ) ){
      this.setSize(220,170 );
    else {
     this.setSize(180,130);
}~Tim

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Expand and Shrink window

Hey I am writing a program that expands and shrinks the JFrame that it is in but all the program does is expand the window here is my code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class expandAndShrink extends JFrame implements ActionListener
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JButton shrinkButton ;
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x=200+x;
y=150+y;The first thing you do is increase the values of x and y. Then you expand and shrink from there. Doesn't look right to me.

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Grow and Shrink the gallery's "mainImage"

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Message was edited by: W_Bell

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