// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java // Load sample Excel file containing pivot table. Workbook wb = new Workbook("input.xlsx"); // Access second worksheet. Worksheet sheet = wb.getWorksheets().get(1); //Access PivotTable collection inside the worksheet PivotTableCollection pivots = sheet.getPivotTables(); // Access first pivot table PivotTable pivot = pivots.get(0); //Access Timeline collection inside the worksheet TimelineCollection timelines = sheet.getTimelines(); // Add timeline relating to pivot table int index = timelines.add(pivot, 15, 1, "Ship Date"); // Access the newly added timeline from timeline collection. Timeline timeline = timelines.get(index); wb.save("output.xlsx");