Java File Write via ByteBuffer write24BitInteger(int integer, ByteOrder order)

Description

write Bit Integer

License

Open Source License

Declaration

public static byte[] write24BitInteger(int integer, ByteOrder order) 

Method Source Code

//package com.java2s;
/* //from  w  w  w .j  av  a  2 s  .c  o  m
 * SynaticMC
 * Copyright (C) 2016 Sander Gielisse
 *
 *     This program 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.
 *
 *     This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.DataOutputStream;
import java.io.IOException;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Arrays;

public class Main {
    public static byte[] write24BitInteger(int integer, ByteOrder order) {
        ByteBuffer tmp = ByteBuffer.allocate(4);
        tmp.order(order);
        tmp.putInt(integer);

        // loose the first or last byte, we want only 3 bytes
        if (order == ByteOrder.BIG_ENDIAN) {
            return subArray(tmp.array(), 1, 4);
        } else if (order == ByteOrder.LITTLE_ENDIAN) {
            return subArray(tmp.array(), 0, 3);
        }
        throw new UnsupportedOperationException("Unknown ByteOrder " + order);
    }

    public static void write24BitInteger(int integer, ByteOrder order, DataOutputStream outputStream)
            throws IOException {
        byte[] data = write24BitInteger(integer, order);
        for (byte b : data) {
            outputStream.writeByte(b);
        }
    }

    public static byte[] subArray(byte[] array, int start, int end) {
        return Arrays.copyOfRange(array, start, end);
    }
}

Related

1. newWriteableBuffer(int capacity)
2. write(File file, String content, String encoding)
3. write(InputStream source, File target)
4. write(Path file, String content)
5. write(SeekableByteChannel channel, long start, byte[] bytes)
6. writeByte(WritableByteChannel channel, byte value)
7. writeBytes(Path file, byte[] bytes)
8. writeComment(File zipFile, String comment)
9. writeDataLengthsToHeader(FileOutputStream fpo)