If you are running a compiled .class file manually, include the JAR in your classpath: java -cp ".;postgresql-42.7.3.jar" MyMainClass Use code with caution. 4. Verifying the Connection

This guide will walk you through the official download methods, version selection, and implementation steps to get your database connection up and running. 1. Where to Download the PostgreSQL JAR

Right-click your project and go to or Build Path . Select Libraries and click the "+" icon.

Yes, it is released under the BSD License and is free for both personal and commercial use.

You will see a list of available versions. Typically, you should choose the Current Version (e.g., PostgreSQL JDBC 42.7.x) unless your project requires an older Java environment.

Most modern applications use JDBC 4.2. If you are on a very old legacy system (Java 7 or below), you may need to scroll down to the "Legacy Versions" section.

Once you have downloaded the PostgreSQL JAR, you need to make it accessible to your project. In an IDE (IntelliJ or Eclipse)