Java Hex Calculate toHex(final byte[] data, final int startPos, final int length)

Description

Returns the hexadecimal representation of a part of a byte array.

License

Open Source License

Parameter

Parameter	Description
data	byte array
startPos	start position
length	length of the relevant array portion

Return

hex representation

Declaration

public static String toHex(final byte[] data, final int startPos, final int length) 

Method Source Code

//package com.java2s;
/*/*w w  w  .j  a  v a  2  s  . c om*/
 * 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
 */

public class Main {
    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();
    }
}

Related

1. tohex(final byte[] bytes)
2. toHex(final byte[] bytes, final int offset, final int count)
3. toHex(final byte[] data)
4. toHex(final byte[] data)
5. toHex(final byte[] data)
6. toHex(final byte[] data, final String separator)
7. toHex(final byte[] input)
8. toHex(final byte[] value)
9. toHex(final char a, final int halfbyte)