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.

A great deal of Java programming -- from conditional statements to iterative loops -- deals with the evaluation of true or false values. When you work with the JDK's Streams API and Lambda functions, ...

But in this case, we are interested in all the classes that implement a given interface. No such information is available via Java Reflection.