Observer pattern java

class JPanelSignal extends JPanel implements Observer {

  void init(Signal lSigAObserver) {
    lSigAObserver.addObserver(this); // (2) ajout d'observateur
  }

  void update(Observable observable, Object objectConcerne) {
    repaint();  // (3) traitement de l'observation
  }
}

Source: fr.wikipedia.org

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