org.jfree.data.time
Interfaces 
TimePeriod
Classes 
Day
DynamicTimeSeriesCollection
FixedMillisecond
Hour
Millisecond
Minute
Month
Quarter
RegularTimePeriod
Second
SimpleTimePeriod
TimePeriodValue
TimePeriodValues
TimePeriodValuesCollection
TimeSeries
TimeSeriesCollection
TimeSeriesDataItem
Week
Year
Exceptions 
TimePeriodFormatException