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 ...

For example, suppose package physics contains a Math class that’s identical to java.lang‘s Math class in that it implements the same PI constant and trigonometric methods.

Single responsibility example in Java. Here's a simple example of a Java class that correctly observes the single responsibility principle. Imagine a number guessing game where each time it is played ...