Package com.actelion.research.util

Class BitUtils

java.lang.Object

com.actelion.research.util.BitUtils

public class BitUtils
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
static long	MASK_FIRST_SHORT
static long	MASK_FOURTH_SHORT
static long	MASK_SEC_SHORT
static long	MASK_THIRD_SHORT

Constructor Summary

Constructors

Constructor	Description
BitUtils()

Method Summary

Modifier and Type	Method	Description
static int	bitCount(int x)	Deprecated. use Integer.bitCount() instead.
static int	bitCount(long x)
static boolean	isBitSet(int[] a, int i)
static boolean	isValidBitIndex(int[] data, int i)
static void	setBit(int[] data, int i)
static void	unsetBit(int[] data, int i)

Methods inherited from class java.lang.Object

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

Field Detail

MASK_FIRST_SHORT

public static final long MASK_FIRST_SHORT

See Also:

Constant Field Values

MASK_SEC_SHORT

public static final long MASK_SEC_SHORT

See Also:

Constant Field Values

MASK_THIRD_SHORT

public static final long MASK_THIRD_SHORT

See Also:

Constant Field Values

MASK_FOURTH_SHORT

public static final long MASK_FOURTH_SHORT

See Also:

Constant Field Values

Constructor Detail

BitUtils

public BitUtils()

Method Detail

bitCount

public static int bitCount(int x)

Deprecated.

use Integer.bitCount() instead.

The fastest Method (by Thomas Sander)

Parameters:

x -

Returns:

bitCount

public static int bitCount(long x)

setBit

public static void setBit(int[] data,
                          int i)

unsetBit

public static void unsetBit(int[] data,
                            int i)

isBitSet

public static boolean isBitSet(int[] a,
                               int i)

isValidBitIndex

public static boolean isValidBitIndex(int[] data,
                                      int i)