Converts a byte array to a hex string. - Java java.lang

Java examples for java.lang:byte Array Convert

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Description

Converts a byte array to a hex string.

Demo Code

/*******************************************************************************
 * Copyright 2014 Katja Hahn//www  . j a  va 2  s  . c o  m
 * 
 * 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.
 ******************************************************************************/
//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(byteToHex(array));
    }

    /**
     * Converts a byte array to a hex string.
     * <p>
     * Every single byte is shown in the string, also prepended zero bytes.
     * Single bytes are delimited with a space character.
     * 
     * @param array
     *            byte array to convert
     * @return hexadecimal string representation of the byte array
     */
    public static String byteToHex(byte[] array) {
        StringBuilder buffer = new StringBuilder();
        for (int i = 0; i < array.length; i++) {
            if ((array[i] & 0xff) < 0x10) {
                buffer.append("0");
            }
            buffer.append(Integer.toString(array[i] & 0xff, 16) + " ");
        }
        return buffer.toString().trim();
    }
}

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