Java Doc for CharBitSet.java in  » Development » PCJ » bak » pcj » set » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Development » PCJ » bak.pcj.set 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


bak.pcj.set.AbstractCharSet
   bak.pcj.set.CharBitSet

CharBitSet
public class CharBitSet extends AbstractCharSet implements CharSortedSet,Cloneable,Serializable(Code)
This class represents bit array based sets of char values. When a bit in the underlying array is set, the value having the same number as the bit is contained in the array. This implies that bit sets cannot contain negative values.

Implementation of CharSortedSet is supported from PCJ 1.2. Prior to 1.2, only CharSet was implemented.

Note: There is no growth policy involved with bit sets. The number of bits to use depends on the value of the largest element and not the size of the set. While sizes are predictable (they grow), a new maximum element is generally not predictable making it meaningless to grow the array at a specific rate.
author:
   Søren Bak
version:
   1.3 21-08-2003 19:54
since:
   1.0




Constructor Summary
public  CharBitSet(char maximum)
     Creates a new bit set with a specified maximum value.
public  CharBitSet()
     Creates a new empty bit set with a capacity of 64.
public  CharBitSet(CharCollection c)
     Creates a new bit set with the same elements as the specified collection.
public  CharBitSet(char[] a)
     Creates a new bit set with the same elements as the specified array.

Method Summary
public  booleanadd(char value)
    
public  voidclear()
    
public  Objectclone()
     Returns a clone of this bit set.
public  booleancontains(char value)
    
public  voidensureCapacity(int maximum)
     Ensures that this bit set can contain a specified maximum element without increasing the capacity.
public  charfirst()
    
public  CharSortedSetheadSet(char to)
    
public  booleanisEmpty()
    
public  CharIteratoriterator()
    
public  charlast()
    
public  booleanremove(char value)
    
public  intsize()
    
public  CharSortedSetsubSet(char from, char to)
    
public  CharSortedSettailSet(char from)
    
public  voidtrimToSize()
     Minimizes the memory used by this bit set.


Constructor Detail
CharBitSet
public CharBitSet(char maximum)(Code)
Creates a new bit set with a specified maximum value.
Parameters:
  maximum - the maximum value representable by the new bitset.
throws:
  IllegalArgumentException - if capacity is negative.



CharBitSet
public CharBitSet()(Code)
Creates a new empty bit set with a capacity of 64.



CharBitSet
public CharBitSet(CharCollection c)(Code)
Creates a new bit set with the same elements as the specified collection.
Parameters:
  c - the collection whose elements to add to the newbit set.
throws:
  NullPointerException - if c is null.
throws:
  IllegalArgumentException - if any of the elements of the specified collectionis negative.



CharBitSet
public CharBitSet(char[] a)(Code)
Creates a new bit set with the same elements as the specified array.
Parameters:
  a - the array whose elements to add to the newbit set.
throws:
  NullPointerException - if a is null.
throws:
  IllegalArgumentException - if any of the elements of the specified arrayis negative.
since:
   1.1




Method Detail
add
public boolean add(char value)(Code)

throws:
  IllegalArgumentException - if value is negative.



clear
public void clear()(Code)



clone
public Object clone()(Code)
Returns a clone of this bit set. a clone of this bit set.
since:
   1.1



contains
public boolean contains(char value)(Code)



ensureCapacity
public void ensureCapacity(int maximum)(Code)
Ensures that this bit set can contain a specified maximum element without increasing the capacity. If many elements are added, and the maximum element among those is known before they are added, this method may improve performance.
Parameters:
  maximum - the maximum element that this set should be ableto contain without increasing the capacity.
throws:
  IllegalArgumentException - if maximum is negative.



first
public char first()(Code)

since:
   1.2



headSet
public CharSortedSet headSet(char to)(Code)

since:
   1.2



isEmpty
public boolean isEmpty()(Code)



iterator
public CharIterator iterator()(Code)



last
public char last()(Code)

since:
   1.2



remove
public boolean remove(char value)(Code)



size
public int size()(Code)



subSet
public CharSortedSet subSet(char from, char to)(Code)

since:
   1.2



tailSet
public CharSortedSet tailSet(char from)(Code)

since:
   1.2



trimToSize
public void trimToSize()(Code)
Minimizes the memory used by this bit set. The underlying array is replaced by an array whose size corresponds to the maximum elements in this bit set. The method can be used to free up memory after many removals.



Methods inherited from bak.pcj.set.AbstractCharSet
public boolean equals(Object obj)(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)

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