org.jboss.lang
Class NumberHelper

java.lang.Object
  org.jboss.lang.NumberHelper

public class NumberHelper
extends Object

Implementations of java.lang.Integer and other Number methods added in jdk5 Code from http://www.hackersdelight.org/HDcode.htm

Version:

$Revision: 227 $

Author:

Elias Ross

Constructor Summary

NumberHelper()

Method Summary

static int	bitCount(int i) http://www.hackersdelight.org/HDcode/pop.c
static int	bitCount(long i)
static int	highestOneBit(int i) http://www.hackersdelight.org/HDcode/flp2.c
static long	highestOneBit(long i)
static int	lowestOneBit(int i) http://www.topcoder.com/tc?module=Static&d1=tutorials&d2=bitManipulation
static long	lowestOneBit(long i)
static int	numberOfLeadingZeros(int i) http://www.hackersdelight.org/HDcode/nlz.c
static int	numberOfLeadingZeros(long i)
static int	numberOfTrailingZeros(int i) http://www.hackersdelight.org/HDcode/ntz.c
static int	numberOfTrailingZeros(long i)
static int	reverse(int i) http://www.hackersdelight.org/HDcode/reverse.c
static long	reverse(long i)
static int	reverseBytes(int i)
static long	reverseBytes(long i)
static int	rotateLeft(int i, int distance)
static long	rotateLeft(long i, int distance)
static int	rotateRight(int i, int distance)
static long	rotateRight(long i, int distance)
static int	signum(int i)
static int	signum(long i)

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberHelper

public NumberHelper()

Method Detail

highestOneBit

public static int highestOneBit(int i)

http://www.hackersdelight.org/HDcode/flp2.c

lowestOneBit

public static int lowestOneBit(int i)

http://www.topcoder.com/tc?module=Static&d1=tutorials&d2=bitManipulation

numberOfLeadingZeros

public static int numberOfLeadingZeros(int i)

http://www.hackersdelight.org/HDcode/nlz.c

numberOfTrailingZeros

public static int numberOfTrailingZeros(int i)

http://www.hackersdelight.org/HDcode/ntz.c

bitCount

public static int bitCount(int i)

http://www.hackersdelight.org/HDcode/pop.c

rotateLeft

public static int rotateLeft(int i,
                             int distance)

rotateRight

public static int rotateRight(int i,
                              int distance)

reverse

public static int reverse(int i)

http://www.hackersdelight.org/HDcode/reverse.c

signum

public static int signum(int i)

reverseBytes

public static int reverseBytes(int i)

highestOneBit

public static long highestOneBit(long i)

lowestOneBit

public static long lowestOneBit(long i)

numberOfLeadingZeros

public static int numberOfLeadingZeros(long i)

numberOfTrailingZeros

public static int numberOfTrailingZeros(long i)

bitCount

public static int bitCount(long i)

rotateLeft

public static long rotateLeft(long i,
                              int distance)

rotateRight

public static long rotateRight(long i,
                               int distance)

reverse

public static long reverse(long i)

signum

public static int signum(long i)

reverseBytes

public static long reverseBytes(long i)