Java tutorial
//package com.java2s; /* * Copyright (C) 2016 android@19code.com * * 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 String byte2Hex(byte[] b) { StringBuilder sb = new StringBuilder(); for (byte aB : b) { String s = Integer.toHexString(aB & 0xFF); if (s.length() == 1) { sb.append("0"); } //sb.append(s.toUpperCase()); sb.append(s); } return sb.toString(); } }