Readers have returned quite a bit of feedback concerning, “Abstract Classes Vs. Interfaces” from April 2001. A recurring request asks to see a complete example of using interfaces and abstract ...

There are numerous examples of online forums and blogs discussing the differences between interfaces and abstract classes in Java. These include, but are not limited to, JavaWorld’s Abstract ...

This example will show you four different ways to implement this functional interface in your code — starting with how to use an actual class, and how to create very concise code with a lambda ...

Any class that supports this interface will need to supply ... Since we cannot create the interface automatically when an example of ITER is created, we specify the AUTOCREATE='N' option. The iterator ...

Using the abstract reader interface enables you to read from many different types of objects as well. For example, consider the following class, which uses SCL lists to maintain data: class lst ...

It should only be called by other classes via the classes' public interface. Class calls might not be the first and foremost software programming design principle, but it seems to be the one that I ...