JExcel is a library for integrating Microsoft Excel into Swing applications and for working with Excel workbooks and worksheets from Java programs. JExcel functionality can be divided into the following main parts: # Automation of an Excel application, workbooks, worksheets, etc. This is the core functionality of the JExcel library that allows working with Excel applications, workbooks, worksheets, ranges and cells. # Embedding a workbook in a Java Swing application.