// 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");