Here you can find the source of tohex(byte b)
private static String tohex(byte b)
//package com.java2s; /*//w ww. j a va2 s . c o m * Copyright 2013 Krzysztof Otrebski (otros.systems@gmail.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 tohex(byte b) { if (b == 0) return "0"; else if (b == 1) return "1"; else if (b == 2) return "2"; else if (b == 3) return "3"; else if (b == 4) return "4"; else if (b == 5) return "5"; else if (b == 6) return "6"; else if (b == 7) return "7"; else if (b == 8) return "8"; else if (b == 9) return "9"; else if (b == 10) return "a"; else if (b == 11) return "b"; else if (b == 12) return "c"; else if (b == 13) return "d"; else if (b == 14) return "e"; else if (b == 15) return "f"; throw new IllegalArgumentException("we should never be here"); } }