When you write an application, it's common to require data storage. Sometimes you're storing assets your application needs to function, and other times you're storing user data, including preferences and save data. One way to store data is in a database, and in order to communicate between your code and a database, you need a database binding or connector for your language. For Java, a common database connector is JDBC (Java database connectivity.)
1. Install Java
2. Install JDBC with Maven
JDBC is an API, imported into your code with the statement
import java.sql.*, but for it to be useful you must have a database driver and a database installed for it to interact with. The database driver you use and the database you want to communicate with must match: to interact with MySQL, you need a MySQL driver, to interact with SQLite3, you must have the SQLite3 driver, and so on.
<dependency> <groupId>org.postgresql</groupId> <artifactId>postgresql</artifactId> <version>42.5.0</version> </dependency>
3. Install the database
You have to install the database you want to connect to through JDBC. There are several very good open source databases, but I had to choose one for this article, so I chose PostgreSQL.
To install PostgreSQL on Linux, use your software repository. On Fedora, CentOS, Mageia, and similar:
$ sudo dnf install postgresql postgresql-server
On Debian, Linux Mint, Elementary, and similar:
$ sudo apt install postgresql postgresql-contrib
If you're not using PostgreSQL, the same general process applies:
Find the JDBC driver for your database of choice and include it in your
Install the database (server and client) on your development OS.
Three steps and you're ready to start writing code.