JExcel

JExcel is a library (API) to read, write, display, and modify Excel files with .xls or .xlsx formats. API can be embedded with Java Swing and AWT.

JExcel support is discontinued as of May 31, 2020.

Some features
Some main features are as follows:
 * Automate Excel application, workbooks, spreadsheets, etc.
 * Embed workbooks in a Java Swing application as ordinary Swing component
 * Add event listeners to workbooks and spreadsheets
 * Add event handlers to handle the behavior of workbook and spreadsheet events
 * Add native peers to develop custom functionality.

Usage
Primary usage is handling Excel files through its API.

Example
Sample code for reading/writing workbook attributes, setting password, and saving MS Excel 2003 format, might look like as follows: