Mega Code Archive
This class provides methods for working with hexadecimal representations of data
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/*
* JSwiff is an open source Java API for Macromedia Flash file generation
* and manipulation
*
* Copyright (C) 2004-2005 Ralf Terdic (contact@jswiff.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//package com.jswiff.util;
/**
* This class provides methods for working with hexadecimal representations of data.
*/
public class HexUtils {
private static final char[] HEX_DIGITS = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
'E', 'F'
};
/**
* Returns the hexadecimal representation of a byte array.
*
* @param data byte array
*
* @return hex representation
*/
public static String toHex(final byte[] data) {
return toHex(data, 0, data.length);
}
/**
* Returns the hexadecimal representation of a part of a byte array.
*
* @param data byte array
* @param startPos start position
* @param length length of the relevant array portion
*
* @return hex representation
*/
public static String toHex(
final byte[] data, final int startPos, final int length) {
StringBuffer b = new StringBuffer();
int endPos = startPos + length;
for (int i = startPos; i < endPos; i++) {
if (i > 0) {
b.append(' ');
}
int c = data[i];
b.append(HEX_DIGITS[(c & 0xF0) >> 4]);
b.append(HEX_DIGITS[(c & 0x0F) >> 0]);
}
return b.toString();
}
}
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