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.

Get a deep dive into using method references in your Java programs, including stream operations, event listeners, and constructors and factories.

While languages like Ruby provide the pertinent information you need, why can't Java provide a decent, useable, toString() method right out of the box?

Quite often a Java Stream or other component needs an object passed to it in order to perform some type of calculation or process, but when the process is complete, nothing gets returned from the ...