Here you can find the source of toHex(byte[] bytes)
| Parameter | Description |
|---|---|
| bytes | the byte array. |
public static final String toHex(byte[] bytes)
//package com.java2s; /*//from w ww.j a va 2 s. c o m * Copyright (c) 2011 Petter Holmstr?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. */ public class Main { private static final char[] HEX_DIGITS = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; /** * Converts the byte array into a hexadecimal string. * * @param bytes * the byte array. * @return the hexadecimal string */ public static final String toHex(byte[] bytes) { // Algorithm is copied from // http://forums.xkcd.com/viewtopic.php?f=11&t=16666&p=553936. final char[] out = new char[bytes.length * 2]; for (int i = 0; i < bytes.length; i++) { out[2 * i] = HEX_DIGITS[bytes[i] < 0 ? 8 + (bytes[i] + 128) / 16 : bytes[i] / 16]; // append sign bit for negative bytes out[2 * i + 1] = HEX_DIGITS[bytes[i] < 0 ? (bytes[i] + 128) % 16 : bytes[i] % 16]; } return new String(out); // char sequence to string } }