To set up some kind of database running on your development environment, we use Apache Derby database. Apache Derby is a light weight in memory database, which is easy to setup and takes less resources, and is also perfect for testing out new concepts and trying out things that we are doing right now.
To download Apache Derby, hit over the Apache Derby website at http://db.apache.org/derby/derby_downloads.html, and download the latest release. Once the downloaded ZIP file is extracted, we will have some important folder named
lib folder as shown:
lib folder contains the jar ...