For example, the standard class library provides a java.lang.Runnable interface with a single abstract void run() method. This functional interface’s declaration appears below: @FunctionalInterface ...

Don't be intimidated by the prospect of doing functional programming in Java. This step-by-step example will help you learn basic Java lambda syntax quickly and effectively.

Functional programming example: Collections Perhaps the most prominent example of where functional programming shines is in dealing with collections.

The functional Predicate interface gets used extensively by the Java 8 Streams API. Any developer who wants to master functional programming in Java will need to be comfortable with the Predicate ...