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

Learn how to use synchronous and asynchronous callbacks in Java—including callbacks with lambda expressions, CompletableFuture, and more.

JShell provides an interactive shell for quickly prototyping, debugging, and learning Java and Java APIs. In this article, we’ll take a comprehensive look at JShell, understanding all its ...

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 ...

We discuss how to work with directories, sub-directories, and traverse them using Java and the DirectoryStream method. Learn more.

There is a reason why Java method modifiers exist. If you call public methods internally and don't understand why, your developers could face major class issues.

I have an interface that returns a class containing common classes. But where do I define the class? What I want is something like: public interface Foo { String getName(); FooType getFoo(int a ...