Java Integer to Byte Array intToBytes(int i)

Description

Converts primitive int type to byte array.

License

GNU General Public License

Parameter

Parameter	Description
i	Integer value.

Return

Array of bytes.

Declaration

public static byte[] intToBytes(int i) 

Method Source Code

//package com.java2s;
// Copyright (C) GridGain Systems Licensed under GPLv3, http://www.gnu.org/licenses/gpl.html

public class Main {
    /**/*from w  w  w  .j  a  v a 2 s .c om*/
     * Converts primitive {@code int} type to byte array.
     *
     * @param i Integer value.
     * @return Array of bytes.
     */
    public static byte[] intToBytes(int i) {
        return toBytes(i, new byte[4], 0, 4);
    }

    /**
     * Converts primitive {@code int} type to byte array and stores it in specified
     * byte array.
     *
     * @param i Integer value.
     * @param bytes Array of bytes.
     * @param off Offset in {@code bytes} array.
     * @return Number of bytes overwritten in {@code bytes} array.
     */
    public static int intToBytes(int i, byte[] bytes, int off) {
        toBytes(i, bytes, off, 4);

        return 4;
    }

    /**
     * Converts primitive {@code long} type to byte array and stores it in specified
     * byte array. The highest byte in the value is the first byte in result array.
     *
     * @param l Unsigned long value.
     * @param bytes Bytes array to write result to.
     * @param offset Offset in the target array to write result to.
     * @param limit Limit of bytes to write into output.
     * @return Number of bytes overwritten in {@code bytes} array.
     */
    private static byte[] toBytes(long l, byte[] bytes, int offset, int limit) {
        assert bytes != null;
        assert limit <= 8;
        assert bytes.length >= offset + limit;

        for (int i = limit - 1; i >= 0; i--) {
            bytes[offset + i] = (byte) (l & 0xFF);
            l >>>= 8;
        }

        return bytes;
    }
}

Related

1. intToBytes(int i)
2. intToBytes(int i)
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7. intToBytes(int i)
8. IntToBytes(int i)
9. intToBytes(int i, byte[] data, int[] offset)