Java Byte Array Create toBytes(int i)

Description

Convert an integer value into an byte array.

License

Open Source License

Parameter

Parameter	Description
i	An integer value.

Return

A converted byte array.

Declaration

public static byte[] toBytes(int i) 

Method Source Code

//package com.java2s;
/*/* w w w .  j ava  2s  .  c  om*/
 * Copyright (c) 2015 NEC Corporation
 * All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this
 * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
 */

public class Main {
    /**
     * The number of octets in an integer value.
     */
    public static final int NUM_OCTETS_INTEGER = Integer.SIZE / Byte.SIZE;
    /**
     * The number of bits to be shifted to get the first octet in an integer.
     */
    private static final int INT_SHIFT_OCTET1 = 24;
    /**
     * The number of bits to be shifted to get the second octet in an integer.
     */
    private static final int INT_SHIFT_OCTET2 = 16;
    /**
     * The number of bits to be shifted to get the third octet in an integer.
     */
    private static final int INT_SHIFT_OCTET3 = 8;

    /**
     * Convert an integer value into an byte array.
     *
     * @param i  An integer value.
     * @return   A converted byte array.
     */
    public static byte[] toBytes(int i) {
        byte[] b = new byte[NUM_OCTETS_INTEGER];
        setInt(b, 0, i);
        return b;
    }

    /**
     * Set an integer value into the given byte array in network byte order.
     *
     * @param array  A byte array.
     * @param off    Index of {@code array} to store value.
     * @param value  An integer value.
     */
    public static void setInt(byte[] array, int off, int value) {
        int index = off;
        array[index++] = (byte) (value >>> INT_SHIFT_OCTET1);
        array[index++] = (byte) (value >>> INT_SHIFT_OCTET2);
        array[index++] = (byte) (value >>> INT_SHIFT_OCTET3);
        array[index] = (byte) value;
    }
}

Related

1. toBytes(int i)
2. toBytes(int i)
3. toBytes(int i)
4. toBytes(int i)
5. toBytes(int i)
6. toBytes(int integer)
7. toBytes(int integer)
8. toBytes(int intValue)
9. toBytes(int is)