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

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

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.

The Java input/output (I/O) facilities provide a simple, standardized API for reading and writing character and byte data from various data sources. This article explores the I/O classes ...