How to dynamically load a jar in runtime (Not for reflection)

Question

I'm using some vendor's SDK that works fine if the JAR is provided by me. I want to dynamically load the JAR from a custom path that will be provided in properties file / system environment variable. And load the this JAR, just before executing the class that wraps the SDK code.

I've started to write the following code: But I'm not sure which method will actually load the class. Maybe I'm not using the right API for that? (Using dynamic class path with a script is not an option here, I know . . .)

public void load(String path) {
        String className = getClassName();
        if (Utils.isNullOrEmpty(path)) {
            return;
        }
        if (initialized) {
            System.out.println("Already loaded classe " + className);
            return;
        }
        try {
            System.out.println("path = " + path);
            URL[] jars = new URL[]{new URL("file", "", path)};
            System.out.println("url = " + jars[0]);
            try (URLClassLoader classLoader = URLClassLoader.newInstance(jars)) {
                classLoader.loadClass(className);
                System.out.println("classLoader.loadClass(getClassName()) worked");
                Class.forName(className);
                System.out.println("Class.forName(getClassName()) worked");
                ClassLoader.getSystemClassLoader().loadClass(className);
                System.out.println("ClassLoader.getSystemClassLoader().loadClass(getClassName()) worked");

                initialized = true;
                log.debug("Succeeded loading class ");
            } catch (IOException e) {
                log.error("Failed to load SDK from path: {}. Error: {}", path, e.getMessage());
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
                System.out.println("Error to load: " + e.getMessage());
            }




        } catch (MalformedURLException e) {
            System.out.println("Failed to load SDK from path: {}. Error: {} " + path + e.getMessage());
        }
    }

I've tried to use the Java ClassLoader which I'm not sure is the right API here, a colleague insists that it is. (I think that it's only for Reflection use) I've found also a link about Java agent which I haven't tried yet.

I saw other similar questions, but I want to make sure this ClassLoader is not the right method for our use. And if so I'll try something else. Thanks