Examples of java.util.prefs.Preferences.addPreferenceChangeListener()

java.util.prefs.Preferences.addPreferenceChangeListener()
Registers the specified listener to receive preference change events for this preference node. A preference change event is generated when a preference is added to this node, removed from this node, or when the value associated with a preference is changed. (Preference change events are not generated by the {@link #removeNode()} method, which generates a node change event.Preference change events are generated by the clear method.)
Events are only guaranteed for changes made within the same JVM as the registered listener, though some implementations may generate events for changes made outside this JVM. Events may be generated before the changes have been made persistent. Events are not generated when preferences are modified in descendants of this node; a caller desiring such events must register with each descendant. @param pcl The preference change listener to add. @throws NullPointerException if pcl is null. @throws IllegalStateException if this node (or an ancestor) has beenremoved with the {@link #removeNode()} method. @see #removePreferenceChangeListener(PreferenceChangeListener) @see #addNodeChangeListener(NodeChangeListener)

            add(new ExitMenuItem(frame));
        }
        // Update the "recent files" submenu when preferences change:
        Preferences prefs;
        prefs = Application.getPreferences();
        prefs.addPreferenceChangeListener(this);
    }


    private void updateRecentFiles() {
        JMenu recentMenu = (JMenu) get("recentFile");
        if (recentMenu == null) {

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          Preferences p = Preferences.userNodeForPackage(Main.class);
          if (shouldClear) {
            try { p.clear(); } catch (BackingStoreException e) { }
          }
          myListener = new MyListener();
          p.addPreferenceChangeListener(myListener);
          prefs = p;


          setTemplateFile(convertFile(p.get(TEMPLATE_FILE, null)));
          setTemplateType(p.getInt(TEMPLATE_TYPE, TEMPLATE_PLAIN));
        }

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    this.opts = opts;
    this.value = opts[0];
    this.dflt = dflt;
    Preferences prefs = AppPreferences.getPrefs();
    set(prefs.get(name, dflt));
    prefs.addPreferenceChangeListener(this);
  }
  
  public String get() {
    return value;
  }

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  PrefMonitorString(String name, String dflt) {
    super(name);
    this.dflt = dflt;
    Preferences prefs = AppPreferences.getPrefs();
    this.value = prefs.get(name, dflt);
    prefs.addPreferenceChangeListener(this);
  }
  
  public String get() {
    return value;
  }

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    super(name);
    this.dflt = dflt;
    this.value = dflt;
    Preferences prefs = AppPreferences.getPrefs();
    set(Double.valueOf(prefs.getDouble(name, dflt)));
    prefs.addPreferenceChangeListener(this);
  }
  
  public Double get() {
    return Double.valueOf(value);
  }

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    recentFiles = new File[NUM_RECENT];
    recentTimes = new long[NUM_RECENT];
    Arrays.fill(recentTimes, System.currentTimeMillis());
    
    Preferences prefs = AppPreferences.getPrefs();
    prefs.addPreferenceChangeListener(this);
    
    for (int index = 0; index < NUM_RECENT; index++) {
      getAndDecode(prefs, index);
    }
  }

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    super(name);
    this.dflt = dflt;
    this.value = dflt;
    Preferences prefs = AppPreferences.getPrefs();
    set(Integer.valueOf(prefs.getInt(name, dflt)));
    prefs.addPreferenceChangeListener(this);
  }
  
  public Integer get() {
    return Integer.valueOf(value);
  }

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    super(name);
    this.dflt = dflt;
    this.value = dflt;
    Preferences prefs = AppPreferences.getPrefs();
    set(Boolean.valueOf(prefs.getBoolean(name, dflt)));
    prefs.addPreferenceChangeListener(this);
  }
  
  public Boolean get() {
    return Boolean.valueOf(value);
  }

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    // Make sure the map view is redrawn when grid preferences change.
    // todo: move this functionality out of here somehow, but not back into
    // MapView
    final Preferences display = prefs.node("display");
    display.addPreferenceChangeListener(new PreferenceChangeListener() {
      @Override
      public void preferenceChange(PreferenceChangeEvent event) {
        if (mapView == null) {
          return;
        }

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    try {
      p.removeNode();
    } catch (BackingStoreException e2) {
    }
    p.addNodeChangeListener(null);
    p.addPreferenceChangeListener(null);
    p.removeNodeChangeListener(null);
    p.removePreferenceChangeListener(null);
    try {
      p.sync();
    } catch (BackingStoreException e3) {

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