Bonjours à tous !

Voilà mon problème, j'ai un petit problème avec de mes boutons je m'explique en gros dans mon JPanel j'ai créer un nouveau bouton

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private static SpllitButton but = new SpllitButton(0);
Voici la class de mon bouton
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package net.minecraft;
 
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.IOException;
 
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
 
public class SpllitButton extends JButton
 
 
  implements ActionListener, MouseListener
{
  private static final long serialVersionUID = 1L;
  int type = 0;
  Image img;
 
  public SpllitButton(int type)
  {
    this.type = type;
    addActionListener(this);
    addMouseListener(this);
 
    if (type == 0)
		try {
			this.img = ImageIO.read(LauncherFrame.class.getResource("Login.png"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
/*	else if (type == 1)
		try {
			this.img = ImageIO.read(LauncherFrame.class.getResource("optionsbutton.png"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	else if (type == 2) {
      try {
		this.img = ImageIO.read(LauncherFrame.class.getResource("minimizebutton.png"));
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
    }*/
    setOpaque(true);
    ;
    setBounds(450, 300, 99, 28);
    setBorder(BorderFactory.createEmptyBorder());
  }
 
  public void setEnabled(boolean b)
  {
    super.setEnabled(b);
  }
 
  public void paintComponent(Graphics g)
  {
    g.drawImage(this.img, 0, 0, getWidth(), getHeight(), this);
  }
 
 
  public void mouseClicked(MouseEvent event)
  {
  }
 
  public void mouseEntered(MouseEvent event)
  {
    if (this.type == 0)
		try {
			this.img = ImageIO.read(LauncherFrame.class.getResource("LoginC.png"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
/*	else if (this.type == 1)
		try {
			this.img = ImageIO.read(LauncherFrame.class.getResource("optionsbuttonhover.png"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	else if (this.type == 2)
		try {
			this.img = ImageIO.read(LauncherFrame.class.getResource("minimizebuttonhover.png"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}*/
  }
 
  public void mouseExited(MouseEvent event)
  {
    if (this.type == 0)
		try {
			this.img = ImageIO.read(LauncherFrame.class.getResource("Login.png"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	/*else if (this.type == 1)
		try {
			this.img = ImageIO.read(LauncherFrame.class.getResource("optionsbutton.png"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	else if (this.type == 2)
		try {
			this.img = ImageIO.read(LauncherFrame.class.getResource("minimizebutton.png"));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}*/
  }
 
  public void mousePressed(MouseEvent event)
  {
  }
 
  public void mouseReleased(MouseEvent event)
  {
  }
 
@Override
public void actionPerformed(ActionEvent e) {
	// TODO Auto-generated method stub
 
}
}
Et je l'ai intégrer dans mon JPanel dans ma méthode initMenu() comme ceci :
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package net.minecraft;
 
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Checkbox;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Desktop;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.HeadlessException;
import java.awt.Image;
import java.awt.Insets;
import java.awt.Label;
import java.awt.Panel;
import java.awt.Rectangle;
import java.awt.TextField;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.awt.image.FilteredImageSource;
import java.awt.image.VolatileImage;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.Random;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.PBEParameterSpec;
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JEditorPane;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
 
public class LoginForm extends JPanel
{
private int x = 225;
private int y = 10;
  private static final long serialVersionUID = 1L;
  private Image bgImage;
  private JTextField userName;
  private JPasswordField password;
 
  private static SpllitButton but = new SpllitButton(0);
 
  private JCheckBox rememberBox = new JCheckBox("Retenir mot de passe");
 
  private JButton launchButton = new JButton("Login");
 
  private JButton offlineButton = new JButton("Jouer hors ligne");
 
  private JEditorPane news = new JEditorPane();
 
  private JButton options = new JButton("Options");
 
  private Label errorLabel = new Label("", 1);
  private LauncherFrame launcherFrame;
  private boolean outdated = false;
 
  private Image fondtroll = null;
 
  private Image fondoutdate = null;
 
  BufferedImage image = null;
  private Music sound_1 = new Music("lol");
 
  public LoginForm()
  {
 
	setBackground(Color.black);
 
 
  setLayout(null);
    initMenu();
   // playSong(sound_1);
    //readUsername();
 
    this.but.addActionListener(new ActionListener() 
    {
    	public void actionPerformed(ActionEvent ae) 
		{
			if (userName.getText().isEmpty() || password.getText().isEmpty())
			{
				javax.swing.JOptionPane.showMessageDialog(null,"Veuillez compléter les champs requis"); 
 
			}
			else
    		launcherFrame.login(userName.getText(), password.getText());
 
		}
    }
    );
}
 
  public void initMenu()
  {
	  try
	    {
	      this.bgImage = ImageIO.read(LoginForm.class.getResource("BackgroundLauncher.png"));
	    } catch (IOException e) {
	      e.printStackTrace();
	    }
 
	    this.userName = new JTextField(39);
	    this.userName.setBounds(275, 180, 250, 15);
 
	    this.userName.setFocusable(true);
	    this.userName.setForeground(Color.BLACK);
	    this.userName.setCaretColor(Color.BLACK);
	    this.userName.setBorder(BorderFactory.createEmptyBorder());
	    this.userName.setOpaque(true);
	    add(this.userName);
 
	    this.password = new JPasswordField(39);
	    this.password.setBounds(275, 214+30, 275, 15);  
	    this.password.setForeground(Color.BLACK);
	    this.password.setBorder(BorderFactory.createEmptyBorder());
	    this.password.setFocusable(true);
	    this.password.setOpaque(true);
	    add(this.password);
 
 
	    add(this.but);
 
 
 
 
  }
 
 
  public void playSong(Music sound)
  {
  	sound.start();
  }
 
private void readUsername() 
{
  try {
    File lastLogin = new File(Util.getWorkingDirectory(), "lastlogin");
    Cipher cipher = getCipher(2, "passwordfile");
    DataInputStream dis;
  if (cipher != null)
      dis = new DataInputStream(new CipherInputStream(new FileInputStream(lastLogin), cipher));
  else {
      dis = new DataInputStream(new FileInputStream(lastLogin));
    }
    this.userName.setText(dis.readUTF());
    this.password.setText(dis.readUTF());
 
    dis.close();
  } catch (Exception e) {
    e.printStackTrace();
  }
}
 
private void writeUsername() 
{
  try {
    File lastLogin = new File(Util.getWorkingDirectory(), "lastlogin");
    Cipher cipher = getCipher(1, "passwordfile");
    DataOutputStream dos;
  if (cipher != null)
    dos = new DataOutputStream(new CipherOutputStream(new FileOutputStream(lastLogin), cipher));
  else {
    dos = new DataOutputStream(new FileOutputStream(lastLogin));
  }
    dos.writeUTF(this.userName.getText());
    dos.close();
  } catch (Exception e) {
    e.printStackTrace();
  }
}
 
  private Cipher getCipher(int mode, String password) throws Exception {
    Random random = new Random(43287234L);
    byte[] salt = new byte[8];
    random.nextBytes(salt);
    PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 5);
 
    SecretKey pbeKey = SecretKeyFactory.getInstance("PBEWithMD5AndDES").generateSecret(new PBEKeySpec(password.toCharArray()));
    Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
    cipher.init(mode, pbeKey, pbeParamSpec);
    return cipher;
  }
 
  public void update(Graphics g) {
    paint(g);
 
  }
 Image font;
  public void paint(Graphics g2)
  {
 
	 super.paint(g2);
 
    ImageIcon gif;
    int w = getWidth() ;
    int h = getHeight() ;
 
 
    try {
		font = ImageIO.read(LoginForm.class.getResource("font.jpg"));
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
 
 
 
  g2.drawImage(font,0,0,w,h, null);
  g2.drawImage(this.bgImage,20+x,50+y, null);
 
    g2.dispose();
 
 
  }
 
 
 
  public void setError(String errorMessage) {
    removeAll();
 
    this.errorLabel.setText(errorMessage);
    validate();
  }
 
  public void loginOk() {
    writeUsername();
  }
 
  public void setNoNetwork() {
    removeAll();
 
    validate();
  }
 
  public void checkAutologin() {
    if (this.password.getText().length() > 0)
      this.launcherFrame.login(this.userName.getText(), this.password.getText());
  }
 
  public void setOutdated()
  {
    this.outdated = true;
  }
}
Mais le problème c'est que lorsque je lance mon application mon bouton ne s'affiche pas tant que je ne passe pas ma souris au moins 1 fois sur sa position ! Dés lors que j'ai passer ma souris il fonctionne très bien ...

Avez-vous une idée pour résoudre ce problème ?