InfoWorld

Java tip: Fields and methods in Java

The Java tutorial Java 101: Classes and objects in Java introduces the fundamentals of Java classes and objects, including how to declare classes, describe attributes via fields, describe behaviors ...
InfoWorld

Static classes and inner classes in Java

Nested classes are classes that are declared as members of other classes or scopes. Nesting classes is one way to better organize your code. For example, say you have a non-nested class (also known as ...

[Java] Resolve your confusion between 'Interface vs Abstract Class' once and for all! A versatile mental model for the workplace

So, which one should I actually use: an interface or an abstract class?It's a massive wall that everyone hits at least once while learning Java. That is the 'Interface vs Abstract Class' problem.When ...
InfoQ

Java Feature Spotlight: Sealed Classes

The release of Java SE 15 in Sept 2020 will introduce "sealed classes" (JEP 360) as a preview feature. A sealed class is a class or interface which restricts which other classes or interfaces may ...