com.google.common.io
Interfaces 
ByteArrayDataInput
ByteArrayDataOutput
ByteProcessor
InputSupplier
LineProcessor
OutputSupplier
Classes 
ByteStreams
CharStreams
Closeables
CountingInputStream
CountingOutputStream
FileBackedOutputStream
Files
Flushables
LimitInputStream
LineReader
LittleEndianDataInputStream
LittleEndianDataOutputStream
NullOutputStream
PatternFilenameFilter
Resources