Package ubic.basecode.dataStructure

Class BitUtil

java.lang.Object

ubic.basecode.dataStructure.BitUtil

public class BitUtil
extends Object

Based on code from: Derby - Class org.apache.derbyTesting.unitTests.util.BitUtil

Author:

paul

Constructor Summary

Constructors

Constructor	Description
BitUtil()

Method Summary

Modifier and Type	Method	Description
static boolean[]	asBools(byte[] bytes)
static byte[]	clear(byte[] bytes, int position)	Clear the bit at the specified position
static int	count(byte[] bytes)
static boolean	get(byte[] bytes, int position)	Check to see if the specified bit is set
static String	prettyPrint(byte[] bytes)
static byte[]	set(byte[] bytes, int position)	Set the bit at the specified position

Methods inherited from class java.lang.Object

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

Constructor Detail

BitUtil

public BitUtil()

Method Detail

asBools

public static boolean[] asBools(byte[] bytes)

clear

public static byte[] clear(byte[] bytes,
                           int position)

Clear the bit at the specified position

Parameters:

bytes - the byte array

position - the bit to clear, starting from zero

Returns:

the byte array with the cleared bit

Throws:

IndexOutOfBoundsException - on bad position

count

public static int count(byte[] bytes)

Parameters:

bytes -

Returns:

The number of '1' bits.

get

public static boolean get(byte[] bytes,
                          int position)

Check to see if the specified bit is set

Parameters:

bytes - the byte array

position - the bit to check, starting from zero

Returns:

true/false

Throws:

IndexOutOfBoundsException - on bad position

prettyPrint

public static String prettyPrint(byte[] bytes)

Parameters:

bytes -

Returns:

set

public static byte[] set(byte[] bytes,
                         int position)

Set the bit at the specified position

Parameters:

bytes - the byte array

position - the bit to set, starting from zero

Returns:

the byte array with the set bit

Throws:

IndexOutOfBoundsException - on bad position