Java Utililty Methods Long to Byte Array

List of utility methods to do Long to Byte Array

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Description

The list of methods to do Long to Byte Array are organized into topic(s).

Method

byte[]longToBytes(long n)
long To Bytes 
return longToBytes(n, new byte[8], 0);
byte[]longToBytes(long n)
Converts a long value to a cooresponding 8-byte array starting with the most significant byte. 
byte[] b = new byte[8];
for (int i = 0; i < 64; i += 8) {
    b[i >> 3] = (byte) ((n >> (56 - i)) & 0xff);
return b;
voidlongToBytes(long n, byte b[], int offset)
long To Bytes 
for (int i = 0; i < 8; i++) {
    b[offset + i] = (byte) (n & 0xff);
    n = n >> 8;
byte[]longToBytes(long num)
long To Bytes 
byte[] bytes = new byte[8];
for (int i = 0; i < 8; i++) {
    bytes[i] = (byte) (0xff & (num >> (i * 8)));
return bytes;
byte[]longToBytes(long num, byte[] data, int index)
long To Bytes 
for (int i = 0; i < 8; i++) {
    data[index + i] = (byte) (num >> (56 - i * 8));
return data;
byte[]longToBytes(long number)
Converts a long number to a byte array 
byte[] ret = new byte[8];
ret[0] = (byte) ((number >>> 8 * 7) & 0xFF);
ret[1] = (byte) ((number >> 8 * 6) & 0xFF);
ret[2] = (byte) ((number >> 8 * 5) & 0xFF);
ret[3] = (byte) ((number >> 8 * 4) & 0xFF);
ret[4] = (byte) ((number >>> 8 * 3) & 0xFF);
ret[5] = (byte) ((number >> 8 * 2) & 0xFF);
ret[6] = (byte) ((number >> 8 * 1) & 0xFF);
...
byte[]longToBytes(long v)
long To Bytes 
byte[] data = new byte[8];
int offset = 0;
data[offset++] = (byte) ((v >> 56) & 0xFF);
data[offset++] = (byte) ((v >> 48) & 0xFF);
data[offset++] = (byte) ((v >> 40) & 0xFF);
data[offset++] = (byte) ((v >> 32) & 0xFF);
data[offset++] = (byte) ((v >> 24) & 0xFF);
data[offset++] = (byte) ((v >> 16) & 0xFF);
...
byte[]longToBytes(long v)
Javascript doesn't support long data type, so it has to be converted to double before converting it to byte[]. 
return doubleToBytes((double) v);
voidlongToBytes(long v, byte[] b)
long To Bytes 
assert b.length >= 8;
b[0] = (byte) ((v >>> 56) & 0xFF);
b[1] = (byte) ((v >>> 48) & 0xFF);
b[2] = (byte) ((v >>> 40) & 0xFF);
b[3] = (byte) ((v >>> 32) & 0xFF);
b[4] = (byte) ((v >>> 24) & 0xFF);
b[5] = (byte) ((v >>> 16) & 0xFF);
b[6] = (byte) ((v >>> 8) & 0xFF);
...
voidlongToBytes(long v, byte[] bytes)
long To Bytes 
longToBytes(v, bytes, 0);