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.

Kotlin was designed to bring more flexibility and flow to programming in the JVM. Here's an in-depth look at how Kotlin makes working with classes and objects easier and introduces coroutines to ...

He has led software development projects to build enterprise-class software applications and has extensive experience with Java and Perl. He is the author of several Java books, including one called ...