[java]mon animation marche envers

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.GridLayout;
import java.awt.BorderLayout;
import javax.swing.JButton; 
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class Fenetre extends JFrame implements ActionListener
{ 
   private Panneau pan=new Panneau(); 
   private JButton bouton=new JButton("Go");
   private JButton bouton2=new JButton("Stop");
   
   private JPanel container=new JPanel();
   private JLabel label = new JLabel("Le JLabel");
 
   private int compteur =0;
   private boolean animated=true;
   private boolean backX,backY;
   private int x,y;
  public Fenetre()
    {
       this.setTitle("Animation");
       this.setSize(300,300);
       this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       this.setLocationRelativeTo(null);
       container.setBackground(Color.white);
       container.setLayout(new BorderLayout());
       container.add(pan,BorderLayout.CENTER); 
       bouton.addActionListener(new BoutonListener());
       bouton.setEnabled(false);
       bouton2.addActionListener(new Bouton2Listener());
       JPanel south=new JPanel();
       south.add(bouton);
       south.add(bouton2);
       container.add(south,BorderLayout.SOUTH);
       Font police=new Font("Tahoma",Font.BOLD,16);
       label.setFont(police);
       label.setForeground(Color.blue);
       label.setHorizontalAlignment(JLabel.CENTER);
       container.add(label,BorderLayout.NORTH);
       this.setContentPane(container);
        this.setVisible(true);
      go ( ); 
   }
    private void go ( )
   {
           int x=pan.getPosX(),y=pan.getPosY();
           boolean backX=false;    
           boolean backY=false;    
           while(true)
             {
                
                   if(x<1)backX=false;         
                  if(x>pan.getWidth()-50)backX=true;  
                  if(y<1)backY=false;
                  if(y>pan.getHeight()-50)backY=true;                
    
      if(!backX)
              pan.setPosX(++x); 
      else
              pan.setPosX(--x);  
                    if(!backY)
                            pan.setPosY(++y);
                    else
                            pan.setPosY(--y);
                   pan.repaint();
                          try
                            {
                        Thread.sleep(3);
                            }
                  catch(InterruptedException e)
                    {
                        e.printStackTrace();
                    }
         } 
    }


   /****classe qui écoute notre bouton1 Go******/
   class BoutonListener implements ActionListener
   {
    public void actionPerformed(ActionEvent arg0)
    {
    animated=true;
    bouton.setEnabled(true);
    bouton2.setEnabled(false);
    go();
    }
   }
   
   /****classe qui écoute notre bouton2 Stop******/
   class Bouton2Listener implements ActionListener
   {
    {
     animated=false;
     bouton.setEnabled(true);
     bouton2.setEnabled(false);   
           }
      }
}
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class Panneau extends JPanel
{
     private int posX=-50;
     private int posY=-50;
     public void paintComponent (Graphics g)
     {
            g.setColor (Color.white); 
            g.fillRect (0,0,this.getWidth ( ),this.getHeight ( ));  
            g.setColor (Color.red);  
            g.fillOval (posX,posY,50,50);
    }

    public int getPosX( )
    {
        return posX;
    }
    public void setPosX (int posX)
    {
        this.posX=posX;
    }
    public int getPosY ( )
    {
        return posY;
    }
    public void setPosY (int posY)
    {
          this.posY=posY;
    }
  }

 import java.awt.Color;
 import java.awt.Font;
 import java.awt.FontMetrics;
 import java.awt.GradientPaint;
 import java.awt.Graphics;
 import java.awt.Graphics2D;
 import java.awt.Image;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 import java.io.File;
 import java.io.IOException;
 import javax.imageio.ImageIO;
 import javax.swing.JButton;

public class Bouton extends JButton implements MouseListener
{
  private String name;
  private Image img;
  public Bouton(String str)
  {
     super(str);
     this.name=str;
     try
         {
             img=ImageIO.read(new File("FondBouton.png")); 
         }
     catch(IOException e)
        {
             e.printStackTrace();
        }
     this.addMouseListener(this);
  }
  
  public void PaintComponent(Graphics g)
  {
     Graphics2D g2d=(Graphics2D)g;
     GradientPaint gp=new GradientPaint
                          (0,0,Color.blue,0,20,Color.cyan,true);
     g2d.setPaint(gp);
     g2d.drawImage(img,0,0,this.getWidth(),
                                                this.getHeight(), this);
      g2d.setColor(Color.black);
      g2d.drawString(this.name,this.getWidth()/2
                   - (this.getWidth()/2/4), (this.getHeight()/2)+5);
  }
  @Override
  public void mouseClicked(MouseEvent event)
  {
     //pas utile d'utiliser cette méthode ici
  }
  
  public void mouseEnterd(MouseEvent event)
  {
        try
           {  
               img=ImageIO.read(new  
                             File("fondBoutonHover.png"));
            }
       catch(IOException e)
           {
                e.printStackTrace();
           }   
    }
  @Override
  public void mouseExited(MouseEvent event)
  {
      try
        {   
            img=ImageIO.read(new File("fondBouton.png"));
        }
      catch(IOException e)
       {
            e.printStackTrace();
       }
  }
  @Override
  public void mousePressed(MouseEvent event)
  {
      try
        {  
           img=ImageIO.read(new File("fondBoutonClic.png"));
        }
     catch(IOException e)
       {
           e.printStackTrace();
       }
 }
 @Override
  public void mouseReleased(MouseEvent event)
  {
         if(event.getY()>0)
         try
            {    
               img=ImageIO.read(new 
                                  File("fondBoutonHover.png"));
            }
         catch(IOException e)
           {
                e.printStackTrace();
           }
  }

 @Override
  public void mouseEntered(MouseEvent arg0) 
  {
     // TODO Auto-generated method stub 
   }
  
   public static void main(String[] args) 
   {
       Fenetre fen=new Fenetre();
   }
 }