Next, open com.javaworld.sample.helloworld.Activator.java in the Eclipse Java editor. You will notice that you are now able to access the HelloService interface but not the HelloServiceImpl class.

According to the Java Enhancement Proposal 445: …these changes allow us to write Hello, World! with no access modifiers, no static modifiers, and no String[] parameter, so the introduction of these ...

The first thing to do is create a com.javaworld.sample.osgi.spring.contact.Contact.java class, which we’ll use to carry data from ContactDAO to the HelloWorld bundle, as shown in Listing 3.