Here you can find the source of byteToHex(byte b)
static public String byteToHex(byte b)
//package com.java2s; public class Main { static public String byteToHex(byte b) { char hexDigit[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; char[] array = { hexDigit[(b >> 4) & 0x0f], hexDigit[b & 0x0f] }; return new String(array); }//from w ww . j ava 2s. c om }