Convert a byte array to hexadecimal - Java java.lang

Java examples for java.lang:byte Array Convert

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Description

Convert a byte array to hexadecimal

Demo Code

/******************************************************************************
 *   Copyright (c) 2014 VMware, Inc. All Rights Reserved.
 *   Licensed 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.// w w w  .j  a  v a2 s  .  com
 *****************************************************************************/
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        byte[] array = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        System.out.println(java.util.Arrays
                .toString(byteArrayToHexChars(array)));
    }

    final private static char[] hexRepresentation = "0123456789ABCDEF"
            .toCharArray();

    /**
     * Convert a byte array to hexadecimal
     * @param array an array of bytes
     * @return hex String representation of the input
     */
    public static char[] byteArrayToHexChars(final byte[] array) {
        char[] hexChars = new char[array.length * 2];
        int b;
        for (int i = 0; i < array.length; i++) {
            b = array[i] & 0xFF;
            hexChars[2 * i + 0] = hexRepresentation[b >>> 4];
            hexChars[2 * i + 1] = hexRepresentation[b & 0x0F];
        }
        return hexChars;
    }
}

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