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

As the cornerstone of adjusting microgrid output, the electrical load interface unit is difficult to continuously output desired dynamics under various uncertainties. To handle the problem, a variable ...

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.

Describe the bug We use a URL to display Lottie. The URL seems to work most of the time but It gives NullPointerException sometimes here are the logs: Fatal Exception: java.lang.NullPointerException ...

This post explains how to call a method in Java. Learn how to define methods, call them from other classes, and pass arguments!

Many developers get intimidated when they look at all the new APIs that accept lambda expressions as arguments, and wonder how they’ll ever figure out which Java function to use and what the proper ...

Also known as the Java 8 Predicate -- which stems from the JDK version where functional programming was introduced to developers -- this simple interface defines five methods, although only the Java ...