Expand and Shrink window

Question

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
  JButton expandButton ;
  JButton shrinkButton ;
  int x,y;
  int x2,y2;
  // 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
    x=200+x;
    y=150+y;
    if ( evt.getActionCommand().equals( "expand" ) ){
    x2 = (int)(x * 0.1); // This cast is the same as a Floor function
     y2 = (int)(y * 0.1);
     x=x+x2;
    y=y+y2;
    this.setSize(x,y);
    else{
    x2 = (int)(x * 0.1); // This cast is the same as a Floor function
     y2 = (int)(y * 0.1);
     x=x-x2;
    y=y-y2;
    this.setSize(x,y);
  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 ); 
}

Answer 1

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.