Create packages, import packaged classes and interfaces into your programs, move packages, and encapsulate them in jar files.

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 ...

There are over 40 functional interfaces listed in the java.util.functions package, which can make the prospect of functional programming in Java a somewhat daunting task. However, on close inspection, ...

To create a Stack instance and validate the assertions defined, you need to implement the Stack interface. Listing 2 shows Java class StackImpl , which implements the Stack interface.