Put an integer into the given ByteBuffer at the given offset as a 3-byte integer. - Java java.nio

Java examples for java.nio:ByteBuffer Int

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Description

Put an integer into the given ByteBuffer at the given offset as a 3-byte integer.

Demo Code

/*//from  w ww . j a  v  a  2 s  .  co m
Copyright (c) 2005 Health Market Science, Inc.

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library 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
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
USA

You can contact Health Market Science at info@healthmarketscience.com
or at the following address:

Health Market Science
2700 Horizon Drive
Suite 200
King of Prussia, PA 19406
 */
//package com.java2s;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

public class Main {
    /**
     * Put an integer into the given buffer at the given offset as a 3-byte
     * integer.
     * @param buffer buffer into which to insert the int
     * @param val Int to convert
     */
    public static void put3ByteInt(ByteBuffer buffer, int val) {
        put3ByteInt(buffer, val, buffer.order());
    }

    /**
     * Put an integer into the given buffer at the given offset as a 3-byte
     * integer.
     * @param buffer buffer into which to insert the int
     * @param val Int to convert
     * @param order  the order to insert the bytes of the int
     */
    public static void put3ByteInt(ByteBuffer buffer, int val,
            ByteOrder order) {
        int pos = buffer.position();
        put3ByteInt(buffer, val, pos, order);
        buffer.position(pos + 3);
    }

    /**
     * Put an integer into the given buffer at the given offset as a 3-byte
     * integer.
     * @param buffer buffer into which to insert the int
     * @param val Int to convert
     * @param offset offset at which to insert the int
     * @param order  the order to insert the bytes of the int
     */
    public static void put3ByteInt(ByteBuffer buffer, int val, int offset,
            ByteOrder order) {

        int offInc = 1;
        if (order == ByteOrder.BIG_ENDIAN) {
            offInc = -1;
            offset += 2;
        }

        buffer.put(offset, (byte) (val & 0xFF));
        buffer.put(offset + (1 * offInc), (byte) ((val >>> 8) & 0xFF));
        buffer.put(offset + (2 * offInc), (byte) ((val >>> 16) & 0xFF));
    }
}

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