Setting Formulas in Excel with Apache POI

Setting Formulas in Excel with Apache POI

Learn how to set and evaluate Excel formulas in Java with Apache POI. In this quick tutorial, we're going to talk about how we can set formulas in a Microsoft Excel spreadsheet using Apache POI through a simple example.

1. Overview

In this quick tutorial, we're going to talk about how we can set formulas in a Microsoft Excel spreadsheet **using [Apache POI**](https://poi.apache.org/)through a simple example.

2. Apache POI

Apache POI is a popular open-source Java library that provides programmers with APIs to create, modify, and display MS Office files.

It uses Workbook to represent an Excel file and its elements. A Cell in an Excel file can have different types such as FORMULA.

In order to see Apache POI in action, we're going to set a formula to subtract the sum of the values in columns A and B in an Excel file. The linked file contains the data below:

data java excel

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