Java Convert via ByteBuffer hexStringToBytes(String hexString)

Description

hex String To Bytes

License

Apache License

Declaration

public static ByteBuffer hexStringToBytes(String hexString) 

Method Source Code

//package com.java2s;
/**/*from  w w w. j  a  v  a  2  s  .  com*/
 *  Copyright 2011 LiveRamp
 *
 *  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.
 */

import java.nio.ByteBuffer;

public class Main {
    public static ByteBuffer hexStringToBytes(String hexString) {
        hexString = hexString.replaceAll("\\W+", "");
        if (hexString.length() % 2 != 0) {
            throw new RuntimeException("Input string's size must be even.");
        }
        byte[] result = new byte[hexString.length() / 2];
        for (int i = 0; i < hexString.length(); i += 2) {
            result[i / 2] = (byte) Integer.valueOf(hexString.substring(i, i + 2), 16).intValue();
        }
        return ByteBuffer.wrap(result);
    }
}

Related

1. hexDump(byte... b)
2. hexDump(byte[] buffer)
3. hexStrToStr(String hexStr)
4. hexToAscii(byte[] src)
5. hexToBytes(String hexStr)
6. hexToBytes(String hexString)