Here you can find the source of printHexString(byte[] b)
public static String printHexString(byte[] b)
//package com.java2s; public class Main { public static String printHexString(byte[] b) { String str = ""; for (int i = 0; i < b.length; i++) { String hex = Integer.toHexString(b[i] & 0xFF); if (hex.length() == 1) { hex = '0' + hex; }//from w ww . ja v a 2s .c o m str += hex.toUpperCase(); } return str; } }