Apache POI evaluate formula

Question

I have some formulas in cells of my sheet, and I want to evaluate them after I insert some values. Ex :

My formula is =SUM(B1,B2)

Before values

Answer 1

Perhaps XSSFFormulaEvaluator.evaluateAllFormulaCells(XSSFWorkbook wb) ?

(or more specifically: evaluateFormulaCell(Cell cell).)

If it doesn't work: what version of POI are you using? Formulas in XSSF are supported from v3.5.

Also, try to use XSSFCreationHelper to instantiate your Formula Evaluator as suggested by the POI docs.