Java Integer to Byte Array intToByteArray(int i)

Description

converts an int to an array of bytes.

License

Apache License

Parameter

Parameter	Description
i	the int to convert.

Declaration

public static byte[] intToByteArray(int i) 

Method Source Code

//package com.java2s;
/**/*w  ww  .ja  va  2  s.  co m*/
 * Appia: Group communication and protocol composition framework library
 * Copyright 2006 University of Lisbon
 *
 * 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. 
 *
 * Initial developer(s): Alexandre Pinto and Hugo Miranda.
 * Contributor(s): See Appia web page for a list of contributors.
 */

public class Main {
    /**
     * converts an int to an array of bytes.
     * @param i the int to convert.
     */
    public static byte[] intToByteArray(int i) {
        byte[] ret = new byte[4];

        ret[0] = (byte) ((i & 0xff000000) >> 24);
        ret[1] = (byte) ((i & 0x00ff0000) >> 16);
        ret[2] = (byte) ((i & 0x0000ff00) >> 8);
        ret[3] = (byte) (i & 0x000000ff);

        return ret;
    }

    /**
     * Convert an int to a byte array and put the bytes in the given array.
     * @param i the int to convert.
     * @param a the byte array where to place the converted bytes
     * @param o the offset.
     */
    public static void intToByteArray(int i, byte[] a, int o) {
        a[o + 0] = (byte) ((i & 0xff000000) >> 24);
        a[o + 1] = (byte) ((i & 0x00ff0000) >> 16);
        a[o + 2] = (byte) ((i & 0x0000ff00) >> 8);
        a[o + 3] = (byte) (i & 0x000000ff);
    }
}

Related

1. intToByteArray(int a)
2. intToByteArray(int a)
3. intToByteArray(int bytes)
4. intToByteArray(int data)
5. intToByteArray(int i)
6. intToByteArray(int input)
7. intToByteArray(int integer)
8. intToByteArray(int integer)
9. intToByteArray(int piValueToConvert, boolean pbBigEndian)