Learn how to use the Command pattern to encapsulate requests as objects that you can execute alone or in sequence in your Java programs.

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

This post explains how to use classes in Java to build objects and organize your code. Also learn: constructors, static methods, and more!

In Java, printf is recommended as a replacement for calls to the print or println methods. How do you format output with Java printf? To format text based output with the Java printf method, follow ...

This post explains how to use for loops in Java. Including advanced tricks like nested for loops, break, continue, and labels!