Determining When a Preference Node Is Added or Removed - Java Native OS

Java examples for Native OS:Preference

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Description

Determining When a Preference Node Is Added or Removed

Demo Code

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

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

    prefs.addNodeChangeListener(new NodeChangeListener() {
      public void childAdded(NodeChangeEvent evt) {
        Preferences parent = evt.getParent();

        Preferences child = evt.getChild();
      }/*from   w ww .  ja v a  2 s.c  o  m*/

      public void childRemoved(NodeChangeEvent evt) {
        Preferences parent = evt.getParent();

        Preferences child = evt.getChild();
      }
    });

    Preferences child = prefs.node("new node");

    try {
      child.removeNode();

      prefs.removeNode();
    } catch (BackingStoreException e) {
    }
  }
}

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