getLong
Absolute get method for reading a long value.
Reads eight bytes starting at index and composes them into a long value according to the current byte order. The index is in byte units.
Return
The long value at the given index.
Parameters
index
The index from which the long will be read.
Throws
if there are fewer than 8 bytes available starting at index.
Relative get method for reading a long value.
Reads the next eight bytes at this buffer's current position, composing them into a long value according to the current byte order, and then increments the position by eight.
Return
The long value at the current position.
Throws
If there are fewer than eight bytes remaining in this buffer.