I’ve been trying to set up my own REST API for a school project. I decided to use Apache Derby as a database and I want to connect it with my web service, but apparently, I always get this error message: java.sql.SQLException: No suitable driver found for jdbc:derby://localhost:1527/supermarketdb.

When I look at the error message, it also tells me that this code can’t be executed:

public UserService() {
    try {
        con = DriverManager.getConnection("jdbc:derby://localhost:1527/supermarketdb", "root", "adminadmin123"); 
    } catch (SQLException e) {
        e.printStackTrace();
    }  
}

I don’t know why this keeps happening… The Derby JDBC driver JAR file is located in “Referenced Libraries”. By the way, I use NetBeans 22, Apache Derby, JDK 13, and Maven .