org.apache.catalina.util
Class HexUtils

java.lang.Object
  extended byorg.apache.catalina.util.HexUtils

public final class HexUtils
extends java.lang.Object

Library of utility methods useful in dealing with converting byte arrays to and from strings of hexadecimal digits.

Author:
Craig R. McClanahan

Field Summary
static int[] DEC
           
 
Constructor Summary
HexUtils()
           
 
Method Summary
static java.lang.String convert(byte[] bytes)
          Convert a byte array into a printable format containing a String of hexadecimal digit characters (two per byte).
static byte[] convert(java.lang.String digits)
          Convert a String of hexadecimal digits into the corresponding byte array by encoding each two hexadecimal digits as a byte.
static int convert2Int(byte[] hex)
          Convert 4 hex digits to an int, and return the number of converted bytes.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

DEC

public static final int[] DEC
Constructor Detail

HexUtils

public HexUtils()
Method Detail

convert

public static byte[] convert(java.lang.String digits)
Convert a String of hexadecimal digits into the corresponding byte array by encoding each two hexadecimal digits as a byte.

Parameters:
digits - Hexadecimal digits representation
Throws:
java.lang.IllegalArgumentException - if an invalid hexadecimal digit is found, or the input string contains an odd number of hexadecimal digits

convert

public static java.lang.String convert(byte[] bytes)
Convert a byte array into a printable format containing a String of hexadecimal digit characters (two per byte).

Parameters:
bytes - Byte array representation

convert2Int

public static int convert2Int(byte[] hex)
Convert 4 hex digits to an int, and return the number of converted bytes.

Parameters:
hex - Byte array containing exactly four hexadecimal digits
Throws:
java.lang.IllegalArgumentException - if an invalid hexadecimal digit is included


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