Removes all resource bundles from the cache that have been loaded using the caller's class loader.

  Removes all resource bundles from the cache that have been loaded
using the caller's class loader.
Since: 1.6
See Also: ResourceBundle.Control.getTimeToLive(String,Locale),

  Removes all resource bundles from the cache that have been loaded using the given class loader.

  Removes all resource bundles from the cache that have been loaded
using the given class loader.
Parameters:
- loader - the class loader
Throws:
- NullPointerException - if loader is null
Since: 1.6
See Also: ResourceBundle.Control.getTimeToLive(String,Locale),

  Determines whether the given key is contained in this ResourceBundle or its parent bundles.

  Determines whether the given key is contained in
this ResourceBundle or its parent bundles.
Returns: true if the given key is contained in this ResourceBundle or its parent bundles; false otherwise.
Parameters:
- key - the resource key
Throws:
- NullPointerException - if key is null
Since: 1.6

  Gets a resource bundle using the specified base name, the default locale, and the caller's class loader.

  Gets a resource bundle using the specified base name, the default locale,
and the caller's class loader. Calling this method is equivalent to calling

getBundle(baseName, Locale.getDefault(), this.getClass().getClassLoader()),

except that getClassLoader() is run with the security
privileges of ResourceBundle.
See getBundle
for a complete description of the search and instantiation strategy.
Returns: a resource bundle for the given base name and the default locale
Parameters:
- baseName - the base name of the resource bundle, a fully qualified class name
Throws:
- java.lang.NullPointerException - if baseName is null
- MissingResourceException - if no resource bundle for the specified base name can be found

  Gets a resource bundle using the specified base name and locale, and the caller's class loader.

  Gets a resource bundle using the specified base name and locale,
and the caller's class loader. Calling this method is equivalent to calling

getBundle(baseName, locale, this.getClass().getClassLoader()),

except that getClassLoader() is run with the security
privileges of ResourceBundle.
See getBundle
for a complete description of the search and instantiation strategy.
Returns: a resource bundle for the given base name and locale
Parameters:
- baseName - the base name of the resource bundle, a fully qualified class name
- locale - the locale for which a resource bundle is desired
Throws:
- NullPointerException - if baseName or locale is null
- MissingResourceException - if no resource bundle for the specified base name can be found

  Gets a resource bundle using the specified base name, locale, and class loader.

  Gets a resource bundle using the specified base name, locale, and class loader.

Conceptually, getBundle uses the following strategy for locating and instantiating resource bundles:

getBundle uses the base name, the specified locale, and the default locale (obtained from Locale.getDefault) to generate a sequence of candidate bundle names. If the specified locale's language, country, and variant are all empty strings, then the base name is the only candidate bundle name. Otherwise, the following sequence is generated from the attribute values of the specified locale (language1, country1, and variant1) and of the default locale (language2, country2, and variant2):

• baseName + "_" + language1 + "_" + country1 + "_" + variant1
• baseName + "_" + language1 + "_" + country1
• baseName + "_" + language1
• baseName + "_" + language2 + "_" + country2 + "_" + variant2
• baseName + "_" + language2 + "_" + country2
• baseName + "_" + language2
• baseName

Candidate bundle names where the final component is an empty string are omitted. For example, if country1 is an empty string, the second candidate bundle name is omitted.

getBundle then iterates over the candidate bundle names to find the first one for which it can instantiate an actual resource bundle. For each candidate bundle name, it attempts to create a resource bundle:

• First, it attempts to load a class using the candidate bundle name. If such a class can be found and loaded using the specified class loader, is assignment compatible with ResourceBundle, is accessible from ResourceBundle, and can be instantiated, getBundle creates a new instance of this class and uses it as the result resource bundle.
• Otherwise, getBundle attempts to locate a property resource file. It generates a path name from the candidate bundle name by replacing all "." characters with "/" and appending the string ".properties". It attempts to find a "resource" with this name using ClassLoader.getResource. (Note that a "resource" in the sense of getResource has nothing to do with the contents of a resource bundle, it is just a container of data, such as a file.) If it finds a "resource", it attempts to create a new PropertyResourceBundle instance from its contents. If successful, this instance becomes the result resource bundle.

If no result resource bundle has been found, a MissingResourceException is thrown.

Once a result resource bundle has been found, its parent chain is instantiated. getBundle iterates over the candidate bundle names that can be obtained by successively removing variant, country, and language (each time with the preceding "_") from the bundle name of the result resource bundle. As above, candidate bundle names where the final component is an empty string are omitted. With each of the candidate bundle names it attempts to instantiate a resource bundle, as described above. Whenever it succeeds, it calls the previously instantiated resource bundle's setParent method with the new resource bundle, unless the previously instantiated resource bundle already has a non-null parent.

getBundle caches instantiated resource bundles and may return the same resource bundle instance multiple times.

The baseName argument should be a fully qualified class name. However, for compatibility with earlier versions, Sun's Java SE Runtime Environments do not verify this, and so it is possible to access PropertyResourceBundles by specifying a path name (using "/") instead of a fully qualified class name (using ".").

Example:
The following class and property files are provided:

     MyResources.class
     MyResources.properties
     MyResources_fr.properties
     MyResources_fr_CH.class
     MyResources_fr_CH.properties
     MyResources_en.properties
     MyResources_es_ES.class
 

The contents of all files are valid (that is, public non-abstract subclasses of ResourceBundle for the ".class" files, syntactically correct ".properties" files). The default locale is Locale("en", "GB").

Calling getBundle with the shown locale argument values instantiates resource bundles from the following sources:

• Locale("fr", "CH"): result MyResources_fr_CH.class, parent MyResources_fr.properties, parent MyResources.class
• Locale("fr", "FR"): result MyResources_fr.properties, parent MyResources.class
• Locale("de", "DE"): result MyResources_en.properties, parent MyResources.class
• Locale("en", "US"): result MyResources_en.properties, parent MyResources.class
• Locale("es", "ES"): result MyResources_es_ES.class, parent MyResources.class

The file MyResources_fr_CH.properties is never used because it is hidden by MyResources_fr_CH.class. Likewise, MyResources.properties is also hidden by MyResources.class.
Returns: a resource bundle for the given base name and locale
Parameters:
- baseName - the base name of the resource bundle, a fully qualified class name
- locale - the locale for which a resource bundle is desired
- loader - the class loader from which to load the resource bundle
Throws:
- java.lang.NullPointerException - if baseName, locale, or loader is null
- MissingResourceException - if no resource bundle for the specified base name can be found
Since: 1.2

  Returns a resource bundle using the specified base name, target locale, class loader and control.

  Returns a resource bundle using the specified base name, target locale, class loader and control. Unlike the getBundle factory methods with no control argument, the given control specifies how to locate and instantiate resource bundles. Conceptually, the bundle loading process with the given control is performed in the following steps.

1. This factory method looks up the resource bundle in the cache for the specified baseName, targetLocale and loader. If the requested resource bundle instance is found in the cache and the time-to-live periods of the instance and all of its parent instances have not expired, the instance is returned to the caller. Otherwise, this factory method proceeds with the loading process below.
2. The control.getFormats method is called to get resource bundle formats to produce bundle or resource names. The strings "java.class" and "java.properties" designate class-based and property-based resource bundles, respectively. Other strings starting with "java." are reserved for future extensions and must not be used for application-defined formats. Other strings designate application-defined formats.
3. The control.getCandidateLocales method is called with the target locale to get a list of candidate Locales for which resource bundles are searched.
4. The control.newBundle method is called to instantiate a ResourceBundle for the base bundle name, a candidate locale, and a format. (Refer to the note on the cache lookup below.) This step is iterated over all combinations of the candidate locales and formats until the newBundle method returns a ResourceBundle instance or the iteration has used up all the combinations. For example, if the candidate locales are Locale("de", "DE"), Locale("de") and Locale("") and the formats are "java.class" and "java.properties", then the following is the sequence of locale-format combinations to be used to call control.newBundle.

   Locale	format
   Locale("de", "DE")	java.class
   Locale("de", "DE")	java.properties
   Locale("de")	java.class
   Locale("de")	java.properties
   Locale("")	java.class
   Locale("")	java.properties

5. If the previous step has found no resource bundle, proceed to Step 6. If a bundle has been found that is a base bundle (a bundle for Locale("")), and the candidate locale list only contained Locale(""), return the bundle to the caller. If a bundle has been found that is a base bundle, but the candidate locale list contained locales other than Locale(""), put the bundle on hold and proceed to Step 6. If a bundle has been found that is not a base bundle, proceed to Step 7.
6. The control.getFallbackLocale method is called to get a fallback locale (alternative to the current target locale) to try further finding a resource bundle. If the method returns a non-null locale, it becomes the next target locale and the loading process starts over from Step 3. Otherwise, if a base bundle was found and put on hold in a previous Step 5, it is returned to the caller now. Otherwise, a MissingResourceException is thrown.
7. At this point, we have found a resource bundle that's not the base bundle. If this bundle set its parent during its instantiation, it is returned to the caller. Otherwise, its parent chain is instantiated based on the list of candidate locales from which it was found. Finally, the bundle is returned to the caller.

During the resource bundle loading process above, this factory method looks up the cache before calling the control.newBundle method. If the time-to-live period of the resource bundle found in the cache has expired, the factory method calls the control.needsReload method to determine whether the resource bundle needs to be reloaded. If reloading is required, the factory method calls control.newBundle to reload the resource bundle. If control.newBundle returns null, the factory method puts a dummy resource bundle in the cache as a mark of nonexistent resource bundles in order to avoid lookup overhead for subsequent requests. Such dummy resource bundles are under the same expiration control as specified by control.

All resource bundles loaded are cached by default. Refer to control.getTimeToLive for details.

The following is an example of the bundle loading process with the default ResourceBundle.Control implementation.

Conditions:

• Base bundle name: foo.bar.Messages
• Requested Locale: Locale.ITALY
• Default Locale: Locale.FRENCH
• Available resource bundles: foo/bar/Messages_fr.properties and foo/bar/Messages.properties

First, getBundle tries loading a resource bundle in the following sequence.

• class foo.bar.Messages_it_IT
• file foo/bar/Messages_it_IT.properties
• class foo.bar.Messages_it
• file foo/bar/Messages_it.properties
• class foo.bar.Messages
• file foo/bar/Messages.properties

At this point, getBundle finds foo/bar/Messages.properties, which is put on hold because it's the base bundle. getBundle calls control.getFallbackLocale("foo.bar.Messages", Locale.ITALY) which returns Locale.FRENCH. Next, getBundle tries loading a bundle in the following sequence.

• class foo.bar.Messages_fr
• file foo/bar/Messages_fr.properties
• class foo.bar.Messages
• file foo/bar/Messages.properties

getBundle finds foo/bar/Messages_fr.properties and creates a ResourceBundle instance. Then, getBundle sets up its parent chain from the list of the candiate locales. Only foo/bar/Messages.properties is found in the list and getBundle creates a ResourceBundle instance that becomes the parent of the instance for foo/bar/Messages_fr.properties.
Returns: a resource bundle for the given base name and locale
Parameters:
- baseName - the base name of the resource bundle, a fully qualified class name
- targetLocale - the locale for which a resource bundle is desired
- loader - the class loader from which to load the resource bundle
- control - the control which gives information for the resource bundle loading process
Throws:
- NullPointerException - if baseName, targetLocale, loader, or control is null
- MissingResourceException - if no resource bundle for the specified base name can be found
- IllegalArgumentException - if the given control doesn't perform properly (e.g., control.getCandidateLocales returns null.) Note that validation of control is performed as needed.
Since: 1.6

  Returns a resource bundle using the specified base name, target locale and control, and the caller's class loader.

  Returns a resource bundle using the specified base name, target
locale and control, and the caller's class loader. Calling this
method is equivalent to calling

 getBundle(baseName, targetLocale, this.getClass().getClassLoader(),
           control),
 

except that getClassLoader() is run with the security
privileges of ResourceBundle. See getBundle for the
complete description of the resource bundle loading process with a
ResourceBundle.Control.
Returns: a resource bundle for the given base name and a Locale in locales
Parameters:
- baseName - the base name of the resource bundle, a fully qualified class name
- targetLocale - the locale for which a resource bundle is desired
- control - the control which gives information for the resource bundle loading process
Throws:
- NullPointerException - if baseName, locales or control is null
- MissingResourceException - if no resource bundle for the specified base name in any of the locales can be found.
- IllegalArgumentException - if the given control doesn't perform properly (e.g., control.getCandidateLocales returns null.) Note that validation of control is performed as needed.
Since: 1.6

  Returns a resource bundle using the specified base name, the default locale and the specified control.

  Returns a resource bundle using the specified base name, the
default locale and the specified control. Calling this method
is equivalent to calling

 getBundle(baseName, Locale.getDefault(),
           this.getClass().getClassLoader(), control),
 

except that getClassLoader() is run with the security
privileges of ResourceBundle. See getBundle for the
complete description of the resource bundle loading process with a
ResourceBundle.Control.
Returns: a resource bundle for the given base name and the default locale
Parameters:
- baseName - the base name of the resource bundle, a fully qualified class name
- control - the control which gives information for the resource bundle loading process
Throws:
- NullPointerException - if baseName or control is null
- MissingResourceException - if no resource bundle for the specified base name can be found
- IllegalArgumentException - if the given control doesn't perform properly (e.g., control.getCandidateLocales returns null.) Note that validation of control is performed as needed.
Since: 1.6

  Returns an Enumeration of the keys contained in this ResourceBundle and its parent bundles.

  Returns an Enumeration of the keys contained in
this ResourceBundle and its parent bundles.
Returns: an Enumeration of the keys contained in this ResourceBundle and its parent bundles.
See Also: ResourceBundle.keySet(),

  Returns the locale of this resource bundle.

  Returns the locale of this resource bundle. This method can be used after a
call to getBundle() to determine whether the resource bundle returned really
corresponds to the requested locale or is a fallback.
Returns: the locale of this resource bundle

  Gets an object for the given key from this resource bundle or one of its parents.

  Gets an object for the given key from this resource bundle or one of its parents.
This method first tries to obtain the object from this resource bundle using
handleGetObject.
If not successful, and the parent resource bundle is not null,
it calls the parent's getObject method.
If still not successful, it throws a MissingResourceException.
Returns: the object for the given key
Parameters:
- key - the key for the desired object
Throws:
- NullPointerException - if key is null
- MissingResourceException - if no object for the given key can be found

  Gets a string for the given key from this resource bundle or one of its parents.

  Gets a string for the given key from this resource bundle or one of its parents.
Calling this method is equivalent to calling

(String) getObject(key).

Returns: the string for the given key
Parameters:
- key - the key for the desired string
Throws:
- NullPointerException - if key is null
- MissingResourceException - if no object for the given key can be found
- ClassCastException - if the object found for the given key is not a string

  Gets a string array for the given key from this resource bundle or one of its parents.

  Gets a string array for the given key from this resource bundle or one of its parents.
Calling this method is equivalent to calling

(String[]) getObject(key).

Returns: the string array for the given key
Parameters:
- key - the key for the desired string array
Throws:
- NullPointerException - if key is null
- MissingResourceException - if no object for the given key can be found
- ClassCastException - if the object found for the given key is not a string array

  Returns a Set of the keys contained only in this ResourceBundle.

  Returns a Set of the keys contained
only in this ResourceBundle.
Returns: a Set of the keys contained only in this ResourceBundle
Since: 1.6
See Also: ResourceBundle.keySet(),

  Returns a Set of all keys contained in this ResourceBundle and its parent bundles.

  Returns a Set of all keys contained in this
ResourceBundle and its parent bundles.
Returns: a Set of all keys contained in this ResourceBundle and its parent bundles.
Since: 1.6

  Sets the parent bundle of this bundle.

  Sets the parent bundle of this bundle.
The parent bundle is searched by getObject
when this bundle does not contain a particular resource.
Parameters:
- parent - this bundle's parent bundle.