Java Long to Byte Array longToBytes(long l)

Description

Converts primitive long type to byte array.

License

GNU General Public License

Parameter

Parameter	Description
l	Long value.

Return

Array of bytes.

Declaration

public static byte[] longToBytes(long l) 

Method Source Code

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

public class Main {
    /**/*w  w w. j a  v  a 2 s.c o m*/
     * Converts primitive {@code long} type to byte array.
     *
     * @param l Long value.
     * @return Array of bytes.
     */
    public static byte[] longToBytes(long l) {
        return toBytes(l, new byte[8], 0, 8);
    }

    /**
     * Converts primitive {@code long} type to byte array and stores it in specified
     * byte array.
     *
     * @param l Long 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 longToBytes(long l, byte[] bytes, int off) {
        toBytes(l, bytes, off, 8);

        return 8;
    }

    /**
     * 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. longToBytes(final long l)
2. longToBytes(final long val)
3. longToBytes(final long value)
4. longToBytes(long data)
5. longToBytes(long k, byte[] b, int i)
6. longToBytes(long l)
7. longToBytes(long l)
8. longToBytes(long l, byte[] arr, int startIdx)
9. longToBytes(long l, byte[] b)