PivotTableCollection pivotTables = sheet.getPivotTables();

//Adding a PivotTable to the worksheet
int index = pivotTables.add("=A1:C8","E3","PivotTable2");

//Accessing the instance of the newly added PivotTable
PivotTable pivotTable = pivotTables.get(index);

//Unshowing grand totals for rows.
pivotTable.setRowGrand(false);

//Dragging the first field to the row area.
pivotTable.addFieldToArea(PivotFieldType.ROW,0);

//Dragging the second field to the column area.
pivotTable.addFieldToArea(PivotFieldType.COLUMN,1);

//Dragging the third field to the data area.
pivotTable.addFieldToArea(PivotFieldType.DATA,2);