Package Summary Overview Summary

### class:PropertyResourceBundle [NONE]
-                                                                                     public class PropertyResourceBundle
      extends ResourceBundle
  > `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
API Note: `PropertyResourceBundle` can be constructed either from an `InputStream` or a `Reader`, which represents a property file. Constructing a `PropertyResourceBundle` instance from an `InputStream` requires that the input stream be encoded 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. If "ISO-8859-1" is specified, characters that cannot be represented in ISO-8859-1 encoding must be represented by Unicode Escapes as defined in section 3.3 of The Java™ Language Specification whereas the other constructor which takes a `Reader` does not have that limitation. 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. Implementation Requirements: The implementation of a `PropertyResourceBundle` subclass must be thread-safe if it's simultaneously used by multiple threads. The default implementations of the non-abstract methods in this class are thread-safe. Since: 1.1 See Also: `ResourceBundle`, `ListResourceBundle`, `Properties`

### constructor:<init>(java.io.InputStream) [NONE]
- #### PropertyResourceBundle
                                                                                                      public PropertyResourceBundle​(InputStream stream)
                             throws IOException
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` - 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.

### constructor:<init>(java.io.Reader) [NONE]
- #### PropertyResourceBundle
                                                                                                      public PropertyResourceBundle​(Reader reader)
                             throws IOException
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` - 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`. Since: 1.6

### method:getKeys() [NONE]
- #### getKeys
                                                                                                      public Enumeration<String> getKeys()
Returns an `Enumeration` of the keys contained in this `ResourceBundle` and its parent bundles. Specified by: `getKeys` in class `ResourceBundle` Returns: an `Enumeration` of the keys contained in this `ResourceBundle` and its parent bundles. See Also: `ResourceBundle.keySet()`

### method:handleKeySet() [NONE]
- #### handleKeySet
                                                                                                      protected Set<String> handleKeySet()
Returns a `Set` of the keys contained only in this `ResourceBundle`. Overrides: `handleKeySet` in class `ResourceBundle` Returns: a `Set` of the keys contained only in this `ResourceBundle` Since: 1.6 See Also: `ResourceBundle.keySet()`