Here's a quick JDBC with HSQLDB tutorial to get you up and running with Java database connectivity and the popular HyperSQL database.

Java objects in a relational database context are defined as entities. Entities are objects that are placed in tables where they occupy columns and rows, thereby outliving their existence in the ...

In this second half of the Java persistence with JPA and Hibernate tutorial, we move past concepts and start writing code that persists data to and from a relational database using JPA with Hibernate.