For 2, what's required is a module system. OSGi provides such a mechanism but it's not "official". Each OSGi bundle has its own classloader. Java 8 was suppose

For 2, what's required is a module system. OSGi provides such a mechanism but it's not "official". Each OSGi bundle has its own classloader. Java 8 was supposed to provide modules but they were scrapped so in the meantime, OSGi is the only option.