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 ...

Developers who create a runnable Java class, be it for a ‘Hello World’ demonstration or to kick off a fully featured enterprise application, will enjoy the following technical benefits when using ...

See the Java 101 Java interfaces tutorial for a more in-depth introduction to using interfaces in your Java programs, including where and where not to use default, static, and private methods.

However, they must contain a main method that can be launched, a requirement enforced by the Java compiler. This new feature allows developers to write programs without explicit class declarations.

There is a reason why Java method modifiers exist. If you call public methods internally and don't understand why, your developers could face major class issues.