Q: I’ve been asked to extend my company’s Java-based spreadsheet software to read and write Excel spreadsheets. Can you recommend an open source Java library that will help me with this task?

Another option for writing an Excel file is to write the output in CSV (comma-separated value) format. You can also read a CSV file from a Java application.

The Java input/output (I/O) facilities provide a simple, standardized API for reading and writing character and byte data from various data sources. This article explores the I/O classes ...