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 ...

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

As they exist outside the Java heap, the klasses do not require a Java object header, and they are not the same thing as the class objects used in reflection (which are genuine Java objects).