Learn what a predicate interface is and how to use it in Java. Find out how to create your own custom predicate interface and combine it with other predicates.

How to use Java’s Function interface. For this Java Function interface example, we will provide a single method named “apply” that takes an Integer as an argument, squares it and returns the result as ...

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.

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 ...