Java Hex to Byte Array convertHexStringToByteArray(String hexString)

Description

convert Hex String To Byte Array

License

Apache License

Declaration

public static byte[] convertHexStringToByteArray(String hexString) 

Method Source Code

//package com.java2s;
/*/*from w ww.ja  va  2s . c o  m*/
 * Copyright 2010 Bruno de Carvalho
 *
 * 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[] convertHexStringToByteArray(String hexString) {
        if ((hexString.length() % 2) != 0) {
            throw new IllegalArgumentException("Invalid hex string (length % 2 != 0)");
        }

        byte[] array = new byte[hexString.length() / 2];
        for (int i = 0, arrayIndex = 0; i < hexString.length(); i += 2, arrayIndex++) {
            array[arrayIndex] = Integer.valueOf(hexString.substring(i, i + 2), 16).byteValue();
        }

        return array;
    }
}

Related

1. convertHexAsciiToByteArray(byte[] bytes)
2. convertHEXString2ByteArray(String value)
3. convertHexStringToByteArray(String s)
4. convertHexStringToByteArray(String str, int numBytes, int numCharsPerByte)
5. convertHexStringToByteNoSpace(String s)
6. convertHexStringToBytes(String hex)