net.cscott.jutil

Class HashEnvironment<K,V>

public class HashEnvironment<K,V> extends AbstractMap<K,V> implements Environment<K,V>

A HashEnvironment is an Environment using a HashMap as the backing store.

Version: $Id: HashEnvironment.java,v 1.2 2004/01/13 21:40:19 cananian Exp $

Author: C. Scott Ananian

Constructor Summary
	HashEnvironment() Creates a `HashEnvironment`.
<K2 extends K,V2 extends V>	HashEnvironment(Map<K2,V2> m) Creates a `HashEnvironment` with all the mappings in the given map.

Method Summary
void	clear() Clears all mappings.
boolean	containsKey(Object key) Returns `true` if this map contains a mapping for the specified key.
MapSet<K,V>	entrySet() The `Set` returned by this method is really a `MapSet`.
V	get(Object key) Returns the value to which this map maps the specified key.
Environment.Mark	getMark()
static void	main(String[] argv) Self-test function.
V	put(K key, V value) Associates the specified value with the specified key in this map.
V	remove(Object key) Removes the mapping for this key from this map if present.
int	size() Returns the number of key-value mappings in this map.
void	undoToMark(Environment.Mark m)