Bouton actualise la fenêtre java

@Override
 public void actionPerformed(ActionEvent e) {
  if (e.getSource() == this.bouton) {
   int phy = Integer.parseInt(this.ztphy.getText());
   int mou = Integer.parseInt(this.ztmou.getText());
   int mag = Integer.parseInt(this.ztmag.getText());
   if (Intex.phy >= phy && Intex.mou >= mou && Intex.mag >= mag && phy >= 0 && mou >= 0 && mag >= 0) {
    Intex.phy -= phy ;
    Intex.mou -= mou ;
    Intex.mag -= mag ;
    Intex.debut ();
    String p = String.valueOf(Intex.phy);
    String o = String.valueOf(Intex.mou);
    String i = String.valueOf(Intex.mag);