Class java.util.Properties 
All Packages  Class Hierarchy  This Package  Previous  Next  Index

Class java.util.Properties 

java.lang.Object
|
   +----java.util.Dictionary
|
           +----java.util.Hashtable
|
                   +----java.util.Properties
public class Properties
extends Hashtable
Persistent properties class. This class is basically a hashtable that can be saved/loaded from a stream. If a property is not found, a property list containing defaults is searched. This allows arbitrary nesting.

Variable Index

o defaults

Constructor Index

o Properties()
Creates an empty property list.
o Properties(Properties)
Creates an empty property list with specified defaults.

Method Index

o getProperty(String)
Gets a property with the specified key.
o getProperty(String, String)
Gets a property with the specified key and default.
o list(PrintStream)
List properties, for debugging
o load(InputStream)
Loads properties from an InputStream.
o propertyNames()
Enumerates all the keys.
o save(OutputStream, String)
Save properties to an OutputStream.

Variables

o defaults 
protected Properties defaults

Constructors

o Properties 
public Properties()
Creates an empty property list.
o Properties 
public Properties(Properties defaults)
Creates an empty property list with specified defaults.
Parameters:
defaults - the defaults

Methods

o load 
public synchronized void load(InputStream in) throws IOException
Loads properties from an InputStream.
Parameters:
in - the input stream
Throws: IOException
Error when reading from input stream.
o save 
public synchronized void save(OutputStream out,
String header)
Save properties to an OutputStream. Use the header as a comment at the top of the file.
o getProperty 
public String getProperty(String key)
Gets a property with the specified key. If the key is not found in this property list, tries the defaults. This method returns null if the property is not found.
Parameters:
key - the hashtable key
o getProperty 
public String getProperty(String key,
String defaultValue)
Gets a property with the specified key and default. If the key is not found in this property list, tries the defaults. This method returns defaultValue if the property is not found.
o propertyNames 
public Enumeration propertyNames()
Enumerates all the keys.
o list 
public void list(PrintStream out)
List properties, for debugging 
All Packages  Class Hierarchy  This Package  Previous  Next  Index