org.apache.poi.util
Interfaces 
DelayableLittleEndianOutput
FixedField
Internal
LittleEndianConsts
LittleEndianInput
LittleEndianOutput
Classes 
ArrayUtil
BinaryTree
BitField
BitFieldFactory
BlockingInputStream
ByteField
CommonsLogger
DrawingDump
FontMetricsDumper
HexDump
HexRead
IntegerField
IntList
IntMapper
IOUtils
LittleEndian
LittleEndianByteArrayInputStream
LittleEndianByteArrayOutputStream
LittleEndianInputStream
LittleEndianOutputStream
LongField
NullLogger
POILogFactory
POILogger
ShortField
ShortList
StringUtil
StringUtil.StringsIterator
SystemOutLogger
TempFile
Exceptions 
LittleEndian.BufferUnderrunException
RecordFormatException