Java tutorial
//package com.java2s; /* * Copyright (C) 2008 The Android Open Source Project * * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php * * 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 { private static String toHexadecimalString(byte[] value) { StringBuffer sb = new StringBuffer(); int len = value.length; for (int i = 0; i < len; i++) { int num = ((int) value[i]) & 0xff; if (num < 0x10) { sb.append('0'); } sb.append(Integer.toHexString(num)); if (i < len - 1) { sb.append(':'); } } return sb.toString().toUpperCase(Locale.US); } }