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

    Methods inherited from class java.lang.Object

    equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
  • Constructor Details

    • 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 Details

    • 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.
    • 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