Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications ... additional variables as part of its implementation. These variables are known ...

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 ...

When no explicitly defined constructors exist, Java's virtual machine makes object creation possible by providing a default constructor to developers who want to create instances of the class in their ...