Java NIO MappedByteBuffer OutOfMemoryException

Question

I am really in trouble: I want to read HUGE files over several GB using FileChannels and MappedByteBuffers - all the documentation I found implies

Answer 1

The bigger the file, the less you want it all in memory at once. Devise a way to process the file a buffer at a time, a line at a time, etc.

MappedByteBuffers are especially problematic, as there is no defined release of the mapped memory, so using more than one at a time is essentially bound to fail.