Classes and objects in Java must be initialized before they are ... The Java compiler outputs illegal forward reference when it encounters this scenario. Consider Listing 4. In some cases, you ...

Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications ... especially if you forget to document the main class. Also, you might forget ...

The default constructor in Java takes no arguments -- it simply initializes reference types ... virtual machine makes object creation possible by providing a default constructor to developers who want ...