Class Properties2

java.lang.Object
java.util.Dictionary<String,Object>
java.util.Hashtable<String,Object>
com.sun.interview.Properties2
All Implemented Interfaces:
Serializable, Cloneable, Map<String,Object>
public class Properties2 extends Hashtable<String,Object>
The Properties class represents a persistent set of properties. The Properties can be saved to a stream or loaded from a stream. Each key and its corresponding value in the property list is a string.

A property list can contain another property list as its "defaults"; this second property list is searched if the property key is not found in the original property list.

This class is similar to java.util.Properties, but has upgraded capabilities.

See Also:

  • Field Details

    • defaults

      protected Properties2 defaults
      A property list that contains default values for any keys not found in this property list.

  • Constructor Details

    • Properties2

      public Properties2()
      Creates an empty property list with no default values.

    • Properties2

      public Properties2(Properties2 defaults)
      Creates an empty property list with the specified defaults.
      Parameters:
      defaults - the defaults.

  • Method Details

    • load

      public void load(Properties source)

    • load

      public void load(Reader in) throws IOException
      Reads a property list from an input stream.
      Parameters:
      in - the input stream.
      Throws:
      IOException - if an error occurred when reading from the input stream.

    • save

      public void save(Writer out, String header)
      Stores this property list to the specified output stream. The string header is printed as a comment at the beginning of the stream.
      Parameters:
      out - an output stream.
      header - a description of the property list.

    • getProperty

      public String getProperty(String key)
      Searches for the property with the specified key in this property list. If the key is not found in this property list, the default property list, and its defaults, recursively, are then checked. The method returns null if the property is not found.
      Parameters:
      key - the property key.
      Returns:
      the value in this property list with the specified key value.
      See Also:

    • getProperty

      public String getProperty(String key, String defaultValue)
      Searches for the property with the specified key in this property list. If the key is not found in this property list, the default property list, and its defaults, recursively, are then checked. The method returns the default value argument if the property is not found.
      Parameters:
      key - the hashtable key.
      defaultValue - a default value.
      Returns:
      the value in this property list with the specified key value.
      See Also:

    • propertyNames

      public Enumeration<String> propertyNames()
      Returns an enumeration of all the keys in this property list, including the keys in the default property list.
      Returns:
      an enumeration of all the keys in this property list, including the keys in the default property list.
      See Also:

    • list

      public void list(PrintWriter out)
      Prints this property list out to the specified output stream. This method is useful for debugging.
      Parameters:
      out - an output stream.