Java tutorial
//package com.java2s; //License from project: Apache License public class Main { public static String parseByte2HexStr(byte buf[]) { StringBuilder stringBuilder = new StringBuilder(); for (byte b : buf) { String hex = Integer.toHexString(b & 0xFF); if (hex.length() == 1) { hex = '0' + hex; } stringBuilder.append(hex.toUpperCase()); } return stringBuilder.toString(); } }