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

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 ...

The Java Iterator is an all-purpose interface that simplifies looping through a collection of objects. Java's ListIterator provides all the functionality of the Iterator interface, with four ...

The following fails on Java 17 and works on 11 and 16: ...

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

Nested interfaces with static methods (static method interfaces) Many developers believe that nesting a class in an interface violates object-oriented programming and the purpose for an interface.

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 ...