org.jfree.util
Interfaces 
Configuration
ExtendedConfiguration
LogTarget
PublicCloneable
Classes 
AbstractObjectList
ArrayUtilities
AttributedStringUtilities
BooleanList
BooleanUtilities
ClassComparator
DefaultConfiguration
ExtendedConfigurationWrapper
HashNMap
LineBreakIterator
Log
Log.SimpleMessage
LogContext
ObjectList
ObjectTable
ObjectUtilities
PaintList
PaintUtilities
PrintStreamLogTarget
ReadOnlyIterator
ResourceBundleSupport
Rotation
ShapeList
ShapeUtilities
SortedConfigurationWriter
SortOrder
StringUtils
StrokeList
TableOrder
UnitType
WaitingImageObserver
Exceptions 
StackableException
StackableRuntimeException