Here's how to make classes, fields, methods, constructors, and objects work together in your Java programs.

Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your 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.

Within Java, dynamic-loading is typically achieved by calling the forName method on the class java.lang.Class; however, when Class.forName is called from within an Extension, strange errors can occur.

Compile-Time Polymorphism in Java occurs when multiple methods in the same class have the same name but different parameters. The method that is executed is determined at compile-time based on the ...

I encountered multiple compilation errors when using the generated Java classes from the schema.json file for Admin API, which was fetched using the method described in Issue #65. These errors require ...

We discuss how to work with directories, sub-directories, and traverse them using Java and the DirectoryStream method. Learn more.