jodd-joy/src/main/java/jodd/joy/JoyScanner.java
@Override
	public JoyScanner scanClasspathOf(final Class applicationClass) {
		requireNotStarted(classScanner);
		appClasses.add(applicationClass);
		return this;
	}
@Override
	public JoyScanner scanClasspathOf(final Class applicationClass) {
		requireNotStarted(classScanner);
		appClasses.add(applicationClass);
		return this;
	}
Defines class and it's classloader to scan. This is not required in Java8
and would not hurt anything if called. However, for Java9, you should
pass <i>any</i> user-application class, so Jodd can figure out the real
class path to scan.