Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....//Instantiate a new workbook Workbook workbook = new Workbook ( "book1.xls"...first worksheet Cells cells = workbook . getWorksheets (). get (...