Erreur "java.lang.ClassNotFoundException: org.postgresql.Driver"

Question

I start a project with Java (8, SDK 21.0.2) on IntelliJ IDEA Community Edition 2022.1.1. MMy database is on PostgreSql (16). I created the class + method below, in order to test my database connexion :

import java.sql.*;


public class Connect {
    public static void main(String[] args) throws ClassNotFoundException {
        try {
            Connection connection = null;
            Class.forName("org.postgresql.Driver");
            connection = DriverManager.getConnection("jdbc:postgresql://localhost:PORT/DB", "USER", "PASSWORD");
            System.out.println("OK ! :)");
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
            System.out.println("KO ! :(");
        }
    }
}

I download the driver postgresql-42.7.3.jar, which I put in a repository "lib" within my project. On IntelliJ, I went in File > Project Structure > Modules > Dependencies > I added postgresql-42.7.3.jar. The way associated is exactly the same than the repository "lib" in my project. But when I write the command "java Connect.java", I got the error "Exception in thread "main" java.lang.ClassNotFoundException: org.postgresql.Driver". Have I missed something in the manual installation of the driver ? (I don't use Gradle or Maven) Thanks for your answers !

• I installed the drive as dependency of my project
• I installed the plugin DB Navigator on Intellij > I provided the informations about my database > the connexion test is successfull
• I wrote the absolute way of my driver in my environment variables