Java Byte Array to Hex bytesToHex(byte[] bytes, int groupSize)

Description

bytes To Hex

License

Apache License

Declaration

public static String bytesToHex(byte[] bytes, int groupSize) 

Method Source Code

//package com.java2s;
/*/*from w w  w  . j  a v a  2s  .c o m*/
 * Copyright 2005-2014 Red Hat, Inc.
 * Red Hat licenses this file to you under the Apache License, version
 * 2.0 (the "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *    http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 */

public class Main {
    private static final char[] hexArray = "0123456789ABCDEF".toCharArray();

    public static String bytesToHex(byte[] bytes, int groupSize) {
        if (bytes == null) {
            return "null";
        } else {
            char[] hexChars = new char[bytes.length * 2 + numberOfGroups(bytes, groupSize)];
            int outPos = 0;
            for (int j = 0; j < bytes.length; j++) {
                if (j > 0 && j % groupSize == 0) {
                    hexChars[outPos++] = ' ';
                }
                int v = bytes[j] & 0xFF;
                hexChars[outPos++] = hexArray[v >>> 4];
                hexChars[outPos++] = hexArray[v & 0x0F];
            }
            return new String(hexChars);
        }
    }

    private static int numberOfGroups(byte[] bytes, int groupSize) {
        int groups = bytes.length / groupSize;

        if (bytes.length % groupSize == 0) {
            groups--;
        }

        return groups;
    }
}

Related

1. bytesToHex(byte[] bytes)
2. bytesToHex(byte[] bytes)
3. bytesToHex(byte[] bytes)
4. bytesToHex(byte[] bytes)
5. bytesToHex(byte[] bytes, byte[] hex, int offset)
6. bytesToHex(byte[] bytes, int size, char delim)
7. bytesToHex(byte[] data)
8. bytesToHex(byte[] data)
9. bytesToHex(byte[] data)