Here you can find the source of convertHexAsciiToByteArray(byte[] bytes)
public static byte[] convertHexAsciiToByteArray(byte[] bytes)
//package com.java2s; /**//from w w w . j a va 2 s . c o m * Copyright 2011 Adrian Stabiszewski, as@nfctools.org * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ public class Main { public static byte[] convertHexAsciiToByteArray(byte[] bytes) { return convertHexAsciiToByteArray(bytes, 0, bytes.length); } public static byte[] convertHexAsciiToByteArray(byte[] bytes, int offset, int length) { byte[] bin = new byte[length / 2]; for (int x = 0; x < length / 2; x++) { bin[x] = (byte) Integer.parseInt(new String(bytes, offset + (x * 2), 2), 16); } return bin; } }