Java tutorial
//package com.java2s; /* * Copyright 2002-2009 Team Jaru. * * 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 { public static String toHexString(byte b) { StringBuffer result = new StringBuffer(3); result.append(Integer.toString((b & 0xF0) >> 4, 16)); result.append(Integer.toString(b & 0x0F, 16)); return result.toString(); } public static String toHexString(byte[] bytes) { if (bytes == null) { return null; } StringBuffer result = new StringBuffer(); for (byte b : bytes) { result.append(Integer.toString((b & 0xF0) >> 4, 16)); result.append(Integer.toString(b & 0x0F, 16)); } return result.toString(); } public static String toHexString(byte[] bytes, int offset, int length) { if (bytes == null) { return null; } StringBuffer result = new StringBuffer(); for (int i = offset; i < offset + length; i++) { result.append(Integer.toString((bytes[i] & 0xF0) >> 4, 16)); result.append(Integer.toString(bytes[i] & 0x0F, 16)); } return result.toString(); } }