Java Supplier interface tutorial. As you can see, the code for the class that implements Java’s Supplier interface is fairly simple. The only requirements are the class declaration and the ...

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 ...

Writing pure functions in Java. Listing 1 presents the source code to an example application, DaysInMonth, that is written using an an anonymous inner class and a functional interface.This ...

Anticipating such patterns, Oracle provides the java.util.function package of commonly-used functional interfaces. For example, this package’s Predicate<T> functional interface can be used in ...