Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

If one changes the code (even outside of Together), then the class diagram is updated automatically. Together does support the other 8 UML diagrams, and where possible tries to keep these in sync. If ...

As I was thinking about the remaining differences between Java interfaces and abstract classes in a JDK 8 world, I decided to see what the Java Tutorial had to say on this.