Implementing a Bound Property - Java Object Oriented Design

Java examples for Object Oriented Design:Java Bean

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Description

Implementing a Bound Property

Demo Code

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

public class Main {
  int myProperty;

  public int getMyProperty() {
    return myProperty;
  }/*from   w w  w .  ja  va2 s. c  o  m*/

  public void setMyProperty(int newValue) {
    int oldValue = myProperty;
    myProperty = newValue;
    pceListeners.firePropertyChange("myProperty", new Integer(oldValue),
        new Integer(newValue));
  }

  // Create the listener list.
  PropertyChangeSupport pceListeners = new PropertyChangeSupport(this);

  // The listener list wrapper methods.
  public synchronized void addPropertyChangeListener(
      PropertyChangeListener listener) {
    pceListeners.addPropertyChangeListener(listener);
  }

  public synchronized void removePropertyChangeListener(
      PropertyChangeListener listener) {
    pceListeners.removePropertyChangeListener(listener);
  }
}

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