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

Sealed classes in Java let developers limit the creation and use of subclasses and preserve the class hierarchy. Here is how sealed classes in Java work.

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

The first line of code that new developers encounter when they write their first Java program typically includes a call to System.out.println (). If you’ve ever written a Java program, the following ...

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