Here you can find the source of fromHex(String hex)
public static String fromHex(String hex)
//package com.java2s; public class Main { public static String fromHex(String hex) { return new String(toByte(hex)); }/*from ww w .ja v a2 s . c om*/ private static byte[] toByte(String hexString) { int len = hexString.length() / 2; byte[] result = new byte[len]; for (int i = 0; i < len; i++) result[i] = Integer.valueOf( hexString.substring(2 * i, 2 * i + 2), 16).byteValue(); return result; } }