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Class Hashtable

public class netscape.util.Hashtable
    extends java.lang.Object
    implements java.lang.Cloneable,
               netscape.util.Codable
{
    /* Constructors
     */
    public Hashtable();
    public Hashtable(int);

    /* Methods
     */
    public void clear();
    public Object clone();
    public boolean contains(Object);
    public boolean containsKey(Object);
    public int count();
    public void decode(Decoder);
    public void describeClassInfo(ClassInfo);
    public Enumeration elements();
    public Object[] elementsArray();
    public Vector elementsVector();
    public void encode(Encoder);
    public void finishDecoding();
    public Object get(Object);
    public boolean isEmpty();
    public Enumeration keys();
    public Object[] keysArray();
    public Vector keysVector();
    public Object put(Object, Object);
    public Object remove(Object);
    public int size();
    public String toString();
}

Constructors

Hashtable

  public Hashtable()

Constructs an empty Hashtable. The Hashtable will grow on demand as more elements are added.

Hashtable

  public Hashtable(int initialCapacity)

Constructs a Hashtable capable of holding at least initialCapacity elements before needing to grow.

Methods

  public Object clone()

Creates a shallow copy of the Hashtable. The table itself is cloned, but none of the keys or elements are copied.

Overrides:

clone in class Object

  public int count()

Returns the number of elements in the Hashtable.

  public int size()

Returns the number of elements in the Hashtable.

  public boolean isEmpty()

Returns true if there are no elements in the Hashtable.

  public Enumeration keys()

Returns an Enumeration of the Hashtable's keys.

See Also:

elements

  public Enumeration elements()

Returns an Enumeration of the Hashtable's elements.

See Also:

keys

  public Vector keysVector()

Returns a Vector containing the Hashtable's keys.

  public Vector elementsVector()

Returns a Vector containing the Hashtable's elements.

  public Object[] keysArray()

Returns an Object array containing the Hashtable's keys.

  public Object[] elementsArray()

Returns an Object array containing the Hashtable's elements.

  public boolean contains(Object element)

Returns true if the Hashtable contains the element. This method is slow -- O(n) -- because it must scan the table searching for the element.

  public boolean containsKey(Object key)

Returns true if the Hashtable contains the key key.

  public Object get(Object key)

Returns the element associated with the key. This method returns null if the Hashtable does not contain key. Hashtable hashes and compares key using hashCode() and equals().

  public Object remove(Object key)

Removes key and the element associated with it from the Hashtable. Returns the element associated with key, or null if key was not present.

  public Object put(Object key,
                    Object element)

Places the key/element pair in the Hashtable. Neither key nor element may be null. Returns the old element associated with key, or null if the key was not present.

  public void clear()

Removes all keys and elements from the Hashtable.

  public String toString()

Returns a string serialization of the Hashtable using the Serializer.

Overrides:

toString in class Object

See Also:

Serializer

  public void describeClassInfo(ClassInfo info)

Describes the Hashtable class' information.

See Also:

describeClassInfo

  public void encode(Encoder encoder) throws CodingException

Encodes the Hashtable instance. All the keys and elements must be Codable.

See Also:

encode

  public void decode(Decoder decoder) throws CodingException

Decodes the Hashtable instance.

See Also:

decode

  public void finishDecoding() throws CodingException

Finishes the Hashtable's decoding.

See Also:

finishDecoding

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