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.
-
defaults
-
-
Properties()
- Creates an empty property list.
-
Properties(Properties)
- Creates an empty property list with specified defaults.
-
getProperty(String)
- Gets a property with the specified key.
-
getProperty(String, String)
- Gets a property with the specified key and default.
-
list(PrintStream)
- List properties, for debugging
-
load(InputStream)
- Loads properties from an InputStream.
-
propertyNames()
- Enumerates all the keys.
-
save(OutputStream, String)
- Save properties to an OutputStream.
defaults
protected Properties defaults
Properties
public Properties()
- Creates an empty property list.
Properties
public Properties(Properties defaults)
- Creates an empty property list with specified defaults.
- Parameters:
- defaults - the defaults
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.
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.
getProperty
public String getProperty(String key)
- Gets a property with the specified key. If the key is not
found in this property list, try the defaults. This method
returns null if the property is not found.
- Parameters:
- key - the hashtable key
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, try the defaults.
This method returns def if the property is not found.
propertyNames
public Enumeration propertyNames()
- Enumerates all the keys.
list
public void list(PrintStream out)
- List properties, for debugging
All Packages Class Hierarchy This Package Previous Next Index