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 ...

Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...

Instances are the foundation of object-oriented programming. Static methods are ones that aren't passed in any instance variables. As such, if you move static methods and static variables into a ...

Guava provides a nice approach for building safer and more readable common methods via its Objects class. Although I’ll use the new java.util.Objects class instead for JDK 7 projects, Guava’s ...

Finally, we learned that everything in Java is an object, except primitive data types. Because so much of this programming style involves objects and classes, we will now look at each of these ...