gov.nih.nlm.nls.lvg.Util
Class Bit

java.lang.Object
  gov.nih.nlm.nls.lvg.Util.Bit

public class Bit
extends java.lang.Object

This class provides methods of bit operations.

History:

Version:

V-2006p

Author:

NLM NLS Development Team

Constructor Summary

Bit()

Method Summary

static int	Add(int b1, int b2) Add two integers bitwise.
static long	Add(long b1, long b2) Add two long bitwise.
static boolean	Contain(long container, long item) Determine if a long (container) contains another long (item).
static long	Minus(long b1, long b2) Minus two long bitwise.

Methods inherited from class java.lang.Object

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

Constructor Detail

Bit

public Bit()

Method Detail

Add

public static int Add(int b1,
                      int b2)

Add two integers bitwise. This operation is a bitwise exclusive or operation.

Parameters:

b1 - the first integer to be added

b2 - the second integer to be added

Returns:

result of bidwise addition of two integers.

Minus

public static long Minus(long b1,
                         long b2)

Minus two long bitwise. This operation is a bitwise operation. It take off bit if both bit are 1. keep the same as the first input, otherwise.

Parameters:

b1 - the first long to be deducted

b2 - the second long to deduct

Returns:

result of bidwise minus of two longs.

Add

public static long Add(long b1,
                       long b2)

Add two long bitwise. This operation is a bitwise exclusive or operation.

Parameters:

b1 - the first long to be added

b2 - the second long to be added

Returns:

result of bidwise addition of two longs.

Contain

public static boolean Contain(long container,
                              long item)

Determine if a long (container) contains another long (item). Contains means all bits with value of 1 in item is also 1 in the container Exclusive and is used for this bitwise contain operation.

Parameters:

container - the long container

item - the long containee

Returns:

true and false if container contains or not contain item.