// Create a new workbook Workbook workbook = new Workbook(); IWorksheet worksheet = workbook.getWorksheets().get(0); IRange rangeB1 = worksheet.getRange("B1"); rangeB1.setValue("The ShrinkToFit property is applied"); rangeB1.setShrinkToFit(true); // Save to an excel file workbook.save("ShrinkToFit.xlsx");