org.apache.poi.hssf.record.formula.functions
Interfaces 
FreeRefFunction
Function
XYNumericFunction.Accumulator
Classes 
AggregateFunction
And
BooleanFunction
CalendarFieldFunction
Choose
Column
Columns
Count
Counta
Countif
DateFunc
Days360
Errortype
Even
False
FinanceFunction
Find
Hlookup
Hyperlink
If
Index
Indirect
Isblank
IsError
IsNa
Isref
LogicalFunction
Lookup
Match
MinaMaxa
Mode
MultiOperandNumericFunction
Na
Not
NotImplementedFunction
Now
Npv
NumericFunction
NumericFunction.MultiArg
NumericFunction.OneArg
NumericFunction.TwoArg
Odd
Offset
Or
Pi
Rand
Replace
Row
Rows
Substitute
Sumif
Sumproduct
Sumx2my2
Sumx2py2
Sumxmy2
T
TextFunction
Time
Today
True
Value
Vlookup
XYNumericFunction