org.apache.xalan.xsltc.runtime

Class Hashtable

java.lang.Object

org.apache.xalan.xsltc.runtime.Hashtable

public class Hashtable
extends Object

The main hash-table implementation

Constructor Summary

Constructors

Constructor and Description
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

Modifier and Type	Method and Description
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.
protected void	rehash() Rehashes the contents of the hashtable into a hashtable with a larger capacity.
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.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Hashtable

public Hashtable(int initialCapacity,
                 float loadFactor)

Constructs a new, empty hashtable with the specified initial capacity and the specified load factor.

Hashtable

public Hashtable(int initialCapacity)

Constructs a new, empty hashtable with the specified initial capacity and default load factor.

Hashtable

public Hashtable()

Constructs a new, empty hashtable with a default capacity and load factor.

Method Detail

size

public int size()

Returns the number of keys 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.

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.

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.

get

public Object get(Object key)

Returns the value to which the specified key is mapped in this hashtable.

rehash

protected void rehash()

Rehashes the contents of the hashtable into a hashtable with a larger capacity. This method is called automatically when the number of keys in the hashtable exceeds this hashtable's capacity and load factor.

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.

clear

public void clear()

Clears this hashtable so that it contains no keys.

toString

public String toString()

Returns a rather long string representation of this hashtable. Handy for debugging - leave it here!!!

Overrides:

toString in class Object