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.

The difference between abstract classes and interfaces has long vexed Java developers. Find out how Java 8's default methods introduce both new complexity and new options to that familiar ...

The key difference, however, is that when the Predicate interface runs, a true or false value must be returned. Here is a lambda expression and Predicate example: Predicate<Integer> lambdaPredicate = ...