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. Abstract classes ...

They are regular Java interfaces that comply with all of the traditional rules of syntax. However, they also work with lambda expressions, which is where functional interfaces really shine. Here is ...

Using generics results in more robust code and avoids ClassCastExceptions in your Java programs. This in-depth tutorial introduces you to generics and their types and methods.

Here’s an example of the UnaryOperator in action using a String as the unary type: UnaryOperator<String> extensionAdder = (String text) -> { return text + ".txt";} ; The move into functional ...