Java tutorial
//package com.java2s; //License from project: Open Source License public class Main { public static String Bytes2HexString(byte[] b) { String ret = ""; for (int i = 0; i < b.length; i++) { String hex = Integer.toHexString(b[i] & 0xFF); if (hex.length() == 1) { hex = "0" + hex; } ret += hex.toUpperCase() + " "; } return ret; } }