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

Java, PostgreSQL and JDBC tutorial The first thing you'll learn in this PostgreSQL and Java Database Connectivity (JDBC) tutorial is that most developers simply call it Postgres. The two terms are ...

Learn how to connect to the Cassandra database and perform basic CRUD operations using CQL and the Cassandra Java Driver.

Get to know the Java persistence standard based on Hibernate and learn how to use JPA to store and manage Java objects in a relational or NoSQL database.