XSSFPivotTable.addDataColumn should be called addColumnLabel XSSFPivotTable.addColumnLabel should be called addValue As it stands these method names are out of harmony with the Excel GUI for manipulating dimensions in a Pivot Table. The proposed method renaming would bring the GUI and the api into harmony. Much confusion is to be had under the current naming scheme.
*** This bug has been marked as a duplicate of bug 59705 ***