Java Byte Array to String by Charset stringToByteArray(String str, Charset charsetForEncoding, int lenOfByteArray, byte filler)

Description

Converts the given String into a byte array of given length using the given Charset for encoding.

License

Open Source License

Parameter

Parameter	Description
str	String to encode.
charsetForEncoding	Charset used for encoding.
lenOfByteArray	length of the resulting byte array.
filler	byte used for pedding if encoded string is shorter than given length.

Return

byte array containing the resulting encoded

Declaration

public static byte[] stringToByteArray(String str, Charset charsetForEncoding, int lenOfByteArray,
        byte filler) 

Method Source Code

//package com.java2s;
/*/*w w w.  j  av  a  2  s  .c  om*/
Copyright 2015 Rudolf Fiala
    
This file is part of Alpheus AFP Parser.
    
Alpheus AFP Parser is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
    
Alpheus AFP Parser is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with Alpheus AFP Parser.  If not, see <http://www.gnu.org/licenses/>
*/

import java.nio.charset.Charset;

public class Main {
    /**
     * Converts the given {@link String} into a byte array of given length using the given {@link
     * Charset} for encoding. If the encoded bytes of the given {@link String} is shorter than the
     * given length, the additional encoded bytes are filled with given byte filler. If the encoded
     * bytes of the given {@link String} is longer than the given length, the additional encoded bytes
     * are truncated.
     *
     * @param str                {@link String} to encode.
     * @param charsetForEncoding {@link Charset} used for encoding.
     * @param lenOfByteArray     length of the resulting byte array.
     * @param filler             byte used for pedding if encoded string is shorter than given
     *                           length.
     * @return byte array containing the resulting encoded {@link String}
     */
    public static byte[] stringToByteArray(String str, Charset charsetForEncoding, int lenOfByteArray,
            byte filler) {
        if (charsetForEncoding == null)
            charsetForEncoding = Charset.defaultCharset();
        byte[] encoded = str != null && str.length() > 0 ? str.getBytes(charsetForEncoding) : new byte[] {};
        byte[] result = new byte[lenOfByteArray];
        for (int i = 0; i < lenOfByteArray; i++) {
            if (i < encoded.length) {
                result[i] = encoded[i];
            } else {
                result[i] = filler;
            }
        }
        return result;
    }
}

Related

1. newString(final byte[] bytes, final Charset charset)
2. newString(final byte[] bytes, final Charset charset)
3. newStringFromSplit(CharsetDecoder decoder, CharsetDecoder utf8Decoder, String encoding, byte[] fieldBytes, int length)
4. parseBytes(byte[] encoded, Charset charset)
5. str(byte[] bytes, String charset)
6. toBytes(CharSequence str, String charsetName)
7. toBytes(String string, Charset charset)
8. toChars(byte[] b, String charset)
9. toCharSet(byte[] bytes, String fromCharsetName, String toCharsetName)