edu.northwestern.at.utils
Class XBitSet

java.lang.Object
  java.util.BitSet
      edu.northwestern.at.utils.XBitSet

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

public class XBitSet
extends java.util.BitSet

An enhanced bitset.

See Also:

Serialized Form

Field Summary

static XBitSet

EMPTY_SET The empty set.

Constructor Summary

XBitSet()
Constructs a new empty bitset.

XBitSet(int nbits)
Constructs a new empty bitset with enough room for nbits bits.

XBitSet(int[] bits)
Constructs a new bitset from an array.

XBitSet(int nbits, int[] bits)
Constructs a new bitset with enough room for nbits bits from an array.

Method Summary

int	count() Gets the number of elements in the bitset.
IntIterator	iterator() Gets an iterator over the bitset.
XBitSet	or(XBitSet bitSet) Or another XBitSet with this one.
void	set(int bitIndex, boolean value) Sets the bit at a specificed index to a specified value.

Methods inherited from class java.util.BitSet

and, andNot, cardinality, clear, clear, clear, clone, equals, flip, flip, get, get, hashCode, intersects, isEmpty, length, nextClearBit, nextSetBit, or, set, set, set, size, toString, xor

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

EMPTY_SET

public static final XBitSet EMPTY_SET

The empty set.

Constructor Detail

XBitSet

public XBitSet()

Constructs a new empty bitset.

XBitSet

public XBitSet(int nbits)

Constructs a new empty bitset with enough room for nbits bits.

Parameters:

nbits - The initial size of the bitset.

XBitSet

public XBitSet(int[] bits)

Constructs a new bitset from an array.

Parameters:

bits - An array of the initial bits to set.

XBitSet

public XBitSet(int nbits,
               int[] bits)

Constructs a new bitset with enough room for nbits bits from an array.

Parameters:

nbits - The initial size of the bitset.

bits - An array of the initial bits to set.

Method Detail

count

public int count()

Gets the number of elements in the bitset.

Returns:

The number of elements.

iterator

public IntIterator iterator()

Gets an iterator over the bitset.

The behavior of the iterator is unspecified if the underlying bitset is modified while the iteration is in progress.

Returns:

The iterator.

or

public XBitSet or(XBitSet bitSet)

Or another XBitSet with this one.

Returns:

This bitset ORed with the specified bitset.

set

public void set(int bitIndex,
                boolean value)

Sets the bit at a specificed index to a specified value.

Overrides:

set in class java.util.BitSet

Parameters:

bitIndex - Bit index.

value - The boolean value to set.