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.

Java developers use the interface language feature to abstract class interfaces, ... C.java:15: error: reference to CONSTANT is ambiguous int CONSTANT2 = CONSTANT; ...

However, seasoned Java developers know that sometimes the simplest of language constructs can turn out to be the most powerful, as is the case with object models designed with abstract classes and ...