Determining When a Preference Node Is Added or Removed : Preference « Development « Java Tutorial

1. Java Tutorial
2. Development
3. Preference

import java.util.prefs.NodeChangeEvent;
import java.util.prefs.NodeChangeListener;
import java.util.prefs.Preferences;

public class Main {
  public static void main(String[] argv) throws Exception {
    Preferences prefs = Preferences.userNodeForPackage(String.class);

    prefs.addNodeChangeListener(new NodeChangeListener() {
      public void childAdded(NodeChangeEvent evt) {
        Preferences parent = evt.getParent();
        Preferences child = evt.getChild();
      }
      public void childRemoved(NodeChangeEvent evt) {
        Preferences parent = evt.getParent();
        Preferences child = evt.getChild();
      }
    });
    Preferences child = prefs.node("new node");
    child.removeNode();
    prefs.removeNode();
  }
}