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

Use Java assertions to test your assumptions about program correctness and check them in your code.

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!