java.io
(description)
- Supports system input and output, and object serialization. to
the file system
java.nio
(description)
- Defines buffers for bulk memory operations. Buffers may
be allocated in direct memory for high performance.
java.nio.channels
(description)
- Defines channels, an abstraction for devices capable of
performing I/O operations; defines selectors for
multiplexed, non-blocking I/O