Writing a Java application (see Android) that consumes a JSON API usually involves mapping the JSON objects to Java classes for use in the software. This is a tedious and repetitive task to say ...

Create packages, import packaged classes and interfaces into your programs, move packages, and encapsulate them in jar files.

Classes and objects in Java must be initialized before they are used. You’ve previously learned that class fields are initialized to default values when classes are loaded, and that objects are ...

Java's default constructor lets developers create instances of classes when an explicitly defined constructor does not exist. Here's how it works.

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.