Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

The other types of variables in Java are: byte – stores whole numbers from -128 to 127; short – stores numbers from -32,768 to 32,767; int – stores whole numbers from -2,147,483,648 to ...

Abstract classes and interfaces in Java serve fundamentally different purposes. ... Constant variables in Java. Another rule to remember is that an interface can only contain constant variables.