| ArraySeekableByteChannel | Read-only, seekable, byte-array backed channel. |
| ByteArray | Primitive reader for straight-up little-endian byte arrays. |
| ByteBufferUtil | Utility methods for ByteBuffers. |
| ChannelHelper | Helper for Channels, in particular, SeekableByteChannels. |
| ChannelUtil | Utility methods for Channels, in particular, SeekableByteChannels. |
| DirectByteArrayOutputStream | Extend ByteArrayOutputStream to provide direct access to the underlying byte array. |
| DirectoryEnumerator | List (full in-memory enumeration) or iterate over a directory contents, with support for recursion and file filters (regex). |
| DummyInputStream | Dummy reader class: all read operations return 0, and the number of bytes being read is tracked. |
| DummyOutputStream | Dummy writer class: does not write, simply count the number of bytes being written. |
| EndianUtil | Byte array to/from primitives with endianness support. |
| FileMonitor | |
| IO | File manipulation routines. |
| LEDataInputStream | Little-endian version of a DataInputStream. |
| LEDataOutputStream | Little-endian version of a DataOutputStream. |
| NoopInputStream | A no-operation filter stream. |
| NoopOutputStream | A no-operation filter stream. |
| RotatingFileOutputStream | Output stream whose sinks are a series of files. |
| StreamWrappers | Convenient stream wrappers for to encrypt or compress data. |
| SubSeekableByteChannel | An seekable channel presenting a region of another seekable channel. |
| Endianness | An enumeration, ser-compatible version of ByteOrder. |