Java Utililty Methods Preference

List of utility methods to do Preference

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Description

The list of methods to do Preference are organized into topic(s).

Method

booleanbackingStoreAvailable(Preferences prefs)
Test whether preference can be written to disk from: http://java.sun.com/j2se/1.4.2/docs/guide/lang/preferences.html#prefs-usage-backingstore 
try {
    boolean oldValue = prefs.getBoolean(BACKING_STORE_AVAIL, false);
    prefs.putBoolean(BACKING_STORE_AVAIL, !oldValue);
    prefs.flush();
} catch (BackingStoreException e) {
    return false;
return true;
...
LocalecambiarIdioma(String lang, String country)
Metodo que cambia el lenguaje. 
Preferences userPreferences = Preferences.userRoot();
userPreferences.put("COUNTRY", country);
userPreferences.put("LANG", lang);
return new Locale(lang, country);
ClassclassFor(Object obj)
Returns the class for the given Object. 
Class<?> c = null;
try {
    c = Class.forName(obj.getClass().getCanonicalName());
} catch (ClassNotFoundException e) {
    e.printStackTrace();
    c = Preferences.class;
return c;
...
voidclearPreference(Object context)
clear Preference 
try {
    prefs = Preferences.userRoot().node(context.getClass().getName());
    prefs.clear();
} catch (BackingStoreException e) {
    e.printStackTrace();
voidcount(Preferences preferences, String preferenceName)
count 
int count = preferences.getInt(preferenceName, 0);
preferences.putInt(preferenceName, count + 1);
PreferencescreateNode(String path)
Get node path, create if not already existing. 
assert !path.startsWith("/");
return Preferences.userRoot().node(path);
booleanhasEnv(String key, String value)
has Env 
if (value == null || "".equals(value.trim())) {
    return false;
Preferences preferences = Preferences.systemRoot().node("/ice_water");
return value.equalsIgnoreCase(preferences.get(key, "_null_mode_"));
voidinitEnv(String key, String value)
init Env 
Preferences preferences = Preferences.systemRoot().node("/ice_water");
if (key == null || "".equals(key.trim())) {
    key = "dev_java_mode";
preferences.put(key, value);
booleankeyExists(String className, String prefName)
note that this method is not guaranteed to return an accurate answer if the key in question is nullable. 
final Preferences prefs = userNodeForClass(className);
return prefs.get(prefName, null) != null;
voidreadAllReg(String path)
read All Reg 
Preferences prefsdemo = Preferences.systemRoot().node(path);
try {
    String[] regkeys = prefsdemo.keys();
    for (String key : regkeys) {
        String value = prefsdemo.get(key, null);
        System.out.println(value);
} catch (Exception e) {
...