Java tutorial
//package com.java2s; /******************************************************************************* * Copyright 2013-2015 alladin-IT GmbH * * 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. ******************************************************************************/ import java.util.Locale; public class Main { public static String byteArrayToHexString(final byte[] b) { if (b == null || b.length == 0) return null; final StringBuffer sb = new StringBuffer(b.length * 3 - 1); for (final byte element : b) { if (sb.length() > 0) sb.append(':'); final int v = element & 0xff; if (v < 16) sb.append('0'); sb.append(Integer.toHexString(v)); } return sb.toString().toUpperCase(Locale.US); } }