sos.koa
Class Hex

java.lang.Object
  sos.koa.Hex

public class Hex

extends java.lang.Object

Some static helper methods for dealing with hexadecimal notation.

Version:

$Id: Hex.java,v 1.2 2004/05/04 19:51:52 martijno Exp $

Author:

Martijn Oostdijk (martijno@cs.kun.nl)

Constructor Summary

private

Hex() This private constructor makes it impossible to create instances of this class.

Method Summary

static java.lang.String	bytesToHexString(byte[] text) Converts a byte array to capitalized hexadecimal text.
static java.lang.String	bytesToHexString(byte[] text, int offset, int length) Converts part of a byte array to capitalized hexadecimal text.
static java.lang.String	byteToHexString(int n) Converts the byte n to capitalized hexadecimal text.
private static int	hexCharToInt(char c) Interprets the character c as hexadecimal digit.
static byte[]	hexStringToBytes(java.lang.String text) Converts the hexadecimal string in text to a byte array.
static short	hexStringToShort(java.lang.String text)
static java.lang.String	intToHexString(int n) Converts the integer n to capitalized hexadecimal text.
static java.lang.String	shortToHexString(int n) Converts the short n to capitalized hexadecimal text.

Methods inherited from class java.lang.Object

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

Constructor Detail

Hex

private Hex()

This private constructor makes it impossible to create instances of this class.

Method Detail

byteToHexString

public static java.lang.String byteToHexString(int n)

Converts the byte n to capitalized hexadecimal text.

Parameters:

n - The byte to convert.

Returns:

Capitalized hexadecimal text representation of n.

shortToHexString

public static java.lang.String shortToHexString(int n)

Converts the short n to capitalized hexadecimal text.

Parameters:

n - The short to convert.

Returns:

Capitalized hexadecimal text representation of n.

intToHexString

public static java.lang.String intToHexString(int n)

Converts the integer n to capitalized hexadecimal text.

Parameters:

n - The integer to convert.

Returns:

Capitalized hexadecimal text representation of n.

bytesToHexString

public static java.lang.String bytesToHexString(byte[] text)

Converts a byte array to capitalized hexadecimal text.

Parameters:

text - The byte array to convert.

Returns:

Capitalized hexadecimal text representation of text.

bytesToHexString

public static java.lang.String bytesToHexString(byte[] text,
                                                int offset,
                                                int length)

Converts part of a byte array to capitalized hexadecimal text. Conversion starts at index offset until (excluding) index offset+length.

Parameters:

text - The byte array to convert.

offset - Where to start.

length - How many bytes to convert.

Returns:

Capitalized hexadecimal text representation of text.

hexStringToShort

public static short hexStringToShort(java.lang.String text)
                              throws java.lang.NumberFormatException

Throws:

java.lang.NumberFormatException

hexStringToBytes

public static byte[] hexStringToBytes(java.lang.String text)
                               throws java.lang.NumberFormatException

Converts the hexadecimal string in text to a byte array. If text has an odd number of characters, a 0 is inserted at the beginning.

Parameters:

text - The string to convert.

Returns:

The byte array representation of the hexadecimal string in text.

Throws:

java.lang.NumberFormatException

hexCharToInt

private static int hexCharToInt(char c)
                         throws java.lang.NumberFormatException

Interprets the character c as hexadecimal digit.

Parameters:

c - A character from 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F.

Returns:

The decimal-hexadecimal digit interpretation of c.

Throws:

java.lang.NumberFormatException