Java is now introducing the concept of unnamed classes to further simplify the language for beginners and small programs.

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.

In Java, nested classes are categorized as either static member classes or inner classes. Inner classes are non-static member classes, local classes, or anonymous classes.

Java would become easier for students to learn under a proposal to introduce flexible main methods and anonymous main classes to the language.