Preferences Inspector : Preference « Development « Java Tutorial

import java.util.prefs.PreferenceChangeEvent;
import java.util.prefs.PreferenceChangeListener;
import java.util.prefs.Preferences;

public class MainClass implements PreferenceChangeListener {

  private Preferences userPrefs;

  public static final String NAMEPREF = "name";

  public static final String EMAILPREF = "email";

  public static final String AGEPREF = "age";

  public static final String PHONEPREF = "phone";

  public static void main(String args[]) {
    new MainClass();

  public MainClass() {
    userPrefs = Preferences.userNodeForPackage(MainClass.class);

    System.out.println(userPrefs.get(NAMEPREF, ""));
    System.out.println(userPrefs.get(EMAILPREF, ""));
    System.out.println(userPrefs.get(AGEPREF, ""));
    System.out.println(userPrefs.get(PHONEPREF, ""));

    userPrefs.put(NAMEPREF, "name");
    userPrefs.put(AGEPREF, "Text");
    userPrefs.put(EMAILPREF, "email");
    userPrefs.put(PHONEPREF, "phone");
    System.out.println("Preferences stored");


  public void preferenceChange(PreferenceChangeEvent evt) {

    String key = evt.getKey();
    String val = evt.getNewValue();

    if (key.equals(NAMEPREF)) {
    } else if (key.equals(EMAILPREF)) {
    } else if (key.equals(AGEPREF)) {
    } else if (key.equals(PHONEPREF)) {

6.36.1.Put key value pair to Preference
6.36.2.Get childrenNames from Preferences
6.36.3.Get keys from Preferences
6.36.4.Get name and parent from Preference
6.36.5.Get node from Preference
6.36.6.Get value from Preferences
6.36.7.Getting and Setting Java Type Values in a Preference
6.36.8.Getting the Maximum Size of a Preference Key and Value
6.36.9.Getting the Roots of the Preference Trees
6.36.10.Removing a Preference from a Preference Node
6.36.11.Export Preferences to XML file
6.36.12.Preference save and load
6.36.13.Preferences Inspector
6.36.14.Removing a Preference Node
6.36.15.Determining If a Preference Node Exists
6.36.16.Determining If a Preference Node Contains a Specific Key
6.36.17.Determining If a Preference Node Contains a Specific Value
6.36.18.Read / write data in Windows registry
6.36.19.Retrieving the Parent and Child Nodes of a Preference Node
6.36.20.Exporting the Preferences in a Preference Node
6.36.21.Exporting the Preferences in a Subtree of Preference Nodes
6.36.22.Listening for Changes to Preference Values in a Preference Node
6.36.23.Determining When a Preference Node Is Added or Removed
6.36.24.Get the desired look and feel from a per-user preference