Preferences Inspector : Preference « Development « Java Tutorial

1. Java Tutorial
2. Development
3. Preference

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");

    Preferences.userNodeForPackage(MainClass.class).addPreferenceChangeListener(this);
  }

  public void preferenceChange(PreferenceChangeEvent evt) {

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

    if (key.equals(NAMEPREF)) {
      System.out.println(val);
    } else if (key.equals(EMAILPREF)) {
      System.out.println(val);
    } else if (key.equals(AGEPREF)) {
      System.out.println(val);
    } else if (key.equals(PHONEPREF)) {
      System.out.println(val);
    }
  }
}