Java Utililty Methods ByteBuffer to Long

assert (buffer.capacity() - buffer.position() >= 4);
byte[] data = new byte[4];
data[3] = buffer.get();
data[2] = buffer.get();
data[1] = buffer.get();
data[0] = buffer.get();
return ((data[0] << 24) & 0xff000000l) | ((data[1] << 16) & 0x00ff0000l) | ((data[2] << 8) & 0x0000ff00l)
        | (data[3] & 0x000000ffl);
...

return getUInt(buffer, buffer.capacity(), DEFAULT_BYTE_ORDER);

return 0xFFFFFFFFL & (long) buffer.getInt();

int i[] = new int[n];
for (int k = 0; k < i.length; k++) {
    i[k] = getUInt16(b);
return i;

int first = 0xff & buffer.get();
int second = 0xff & buffer.get();
if (buffer.order() == ByteOrder.LITTLE_ENDIAN) {
    return (first << 8 | second);
} else {
    return (first | second << 8);

int first = 0xff & buffer.get();
int second = 0xff & buffer.get();
if (buffer.order() == ByteOrder.LITTLE_ENDIAN) {
    return (first << 8 | second);
} else {
    return (first | second << 8);

return (b.getInt() & 0xFFFFFFFFL);

short s[] = new short[n];
for (int k = 0; k < s.length; k++) {
    s[k] = getUInt8(b);
return s;

return bb.getInt() & 0xffffffffL;

if ((buf.position() + length) <= buf.limit() && length <= 8) {
    long r = 0;
    for (int i = 0; i < length; i++) {
        r |= (((long) buf.get() & 0xff) << (i << 3));
    return r;
return 0;
...