PropertyResourceBundle

public class PropertyResourceBundle
extends ResourceBundle

java.lang.Object
   ↳ java.util.ResourceBundle
     ↳ java.util.PropertyResourceBundle


PropertyResourceBundle is a concrete subclass of ResourceBundle that manages resources for a locale using a set of static strings from a property file. See ResourceBundle for more information about resource bundles.

Unlike other types of resource bundle, you don't subclass PropertyResourceBundle. Instead, you supply properties files containing the resource data. ResourceBundle.getBundle will automatically look for the appropriate properties file and create a PropertyResourceBundle that refers to it. See ResourceBundle.getBundle for a complete description of the search and instantiation strategy.

The following example shows a member of a resource bundle family with the base name "MyResources". The text defines the bundle "MyResources_de", the German member of the bundle family. This member is based on PropertyResourceBundle, and the text therefore is the content of the file "MyResources_de.properties" (a related example shows how you can add bundles to this family that are implemented as subclasses of ListResourceBundle). The keys in this example are of the form "s1" etc. The actual keys are entirely up to your choice, so long as they are the same as the keys you use in your program to retrieve the objects from the bundle. Keys are case-sensitive.

 # MessageFormat pattern
 s1=Die Platte \"{1}\" enthält {0}.

 # location of {0} in pattern
 s2=1

 # sample disk name
 s3=Meine Platte

 # first ChoiceFormat choice
 s4=keine Dateien

 # second ChoiceFormat choice
 s5=eine Datei

 # third ChoiceFormat choice
 s6={0,number} Dateien

 # sample date
 s7=3. März 1996
 

Inherited fields

Public constructors

PropertyResourceBundle(InputStream stream)

Creates a property resource bundle from an InputStream.

PropertyResourceBundle(Reader reader)

Creates a property resource bundle from a Reader.

Public methods

Enumeration<String> getKeys()

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

Object handleGetObject(String key)

Gets an object for the given key from this resource bundle.

Protected methods

Set<String> handleKeySet()

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

Inherited methods

Public constructors

PropertyResourceBundle

Added in API level 1
public PropertyResourceBundle (InputStream stream)

Creates a property resource bundle from an InputStream. This constructor reads the property file in UTF-8 by default. If a MalformedInputException or an UnmappableCharacterException occurs on reading the input stream, then the PropertyResourceBundle instance resets to the state before the exception, re-reads the input stream in ISO-8859-1 and continues reading. If the system property java.util.PropertyResourceBundle.encoding is set to either "ISO-8859-1" or "UTF-8", the input stream is solely read in that encoding, and throws the exception if it encounters an invalid sequence. Other encoding values are ignored for this system property. The system property is read and evaluated when initializing this class. Changing or removing the property has no effect after the initialization.

Parameters
stream InputStream: an InputStream that represents a property file to read from.

Throws
IOException if an I/O error occurs
NullPointerException if stream is null
IllegalArgumentException if stream contains a malformed Unicode escape sequence.
MalformedInputException if the system property java.util.PropertyResourceBundle.encoding is set to "UTF-8" and stream contains an invalid UTF-8 byte sequence.
UnmappableCharacterException if the system property java.util.PropertyResourceBundle.encoding is set to "UTF-8" and stream contains an unmappable UTF-8 byte sequence.

PropertyResourceBundle

Added in API level 1
public PropertyResourceBundle (Reader reader)

Creates a property resource bundle from a Reader. Unlike the constructor PropertyResourceBundle(InputStream), there is no limitation as to the encoding of the input property file.

Parameters
reader Reader: a Reader that represents a property file to read from.

Throws
IOException if an I/O error occurs
NullPointerException if reader is null
IllegalArgumentException if a malformed Unicode escape sequence appears from reader.

Public methods

getKeys

Added in API level 1
public Enumeration<String> getKeys ()

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

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

handleGetObject

Added in API level 1
public Object handleGetObject (String key)

Gets an object for the given key from this resource bundle. Returns null if this resource bundle does not contain an object for the given key.

Parameters
key String: the key for the desired object

Returns
Object the object for the given key, or null

Protected methods

handleKeySet

Added in API level 9
protected Set<String> handleKeySet ()

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

Returns
Set<String> a Set of the keys contained only in this ResourceBundle