org.apache.xalan.xsltc.runtime

Class Hashtable


public class Hashtable
extends java.lang.Object

The main hash-table implementation

Constructor Summary

Hashtable()
Constructs a new, empty hashtable with a default capacity and load factor.
Hashtable(int initialCapacity)
Constructs a new, empty hashtable with the specified initial capacity and default load factor.
Hashtable(int initialCapacity, float loadFactor)
Constructs a new, empty hashtable with the specified initial capacity and the specified load factor.

Method Summary

void
clear()
Clears this hashtable so that it contains no keys.
boolean
contains(Object value)
Tests if some key maps into the specified value in this hashtable.
boolean
containsKey(Object key)
Tests if the specified object is a key in this hashtable.
Enumeration
elements()
Returns an enumeration of the values in this hashtable.
Object
get(Object key)
Returns the value to which the specified key is mapped in this hashtable.
boolean
isEmpty()
Tests if this hashtable maps no keys to values.
Enumeration
keys()
Returns an enumeration of the keys in this hashtable.
Object
put(Object key, Object value)
Maps the specified key to the specified value in this hashtable.
Object
remove(Object key)
Removes the key (and its corresponding value) from this hashtable.
int
size()
Returns the number of keys in this hashtable.
String
toString()
Returns a rather long string representation of this hashtable.

Constructor Details

Hashtable

public Hashtable()
Constructs a new, empty hashtable with a default capacity and load factor.

Hashtable

public Hashtable(int initialCapacity)
Constructs a new, empty hashtable with the specified initial capacity and default load factor.

Hashtable

public Hashtable(int initialCapacity,
                 float loadFactor)
Constructs a new, empty hashtable with the specified initial capacity and the specified load factor.

Method Details

clear

public void clear()
Clears this hashtable so that it contains no keys.

contains

public boolean contains(Object value)
Tests if some key maps into the specified value in this hashtable. This operation is more expensive than the containsKey method.

containsKey

public boolean containsKey(Object key)
Tests if the specified object is a key in this hashtable.

elements

public Enumeration elements()
Returns an enumeration of the values in this hashtable. Use the Enumeration methods on the returned object to fetch the elements sequentially.

get

public Object get(Object key)
Returns the value to which the specified key is mapped in this hashtable.

isEmpty

public boolean isEmpty()
Tests if this hashtable maps no keys to values.

keys

public Enumeration keys()
Returns an enumeration of the keys in this hashtable.

put

public Object put(Object key,
                  Object value)
Maps the specified key to the specified value in this hashtable. Neither the key nor the value can be null.

The value can be retrieved by calling the get method with a key that is equal to the original key.


remove

public Object remove(Object key)
Removes the key (and its corresponding value) from this hashtable. This method does nothing if the key is not in the hashtable.

size

public int size()
Returns the number of keys in this hashtable.

toString

public String toString()
Returns a rather long string representation of this hashtable. Handy for debugging - leave it here!!!

Copyright B) 2005 Apache XML Project. All Rights Reserved.