This post explains how to use variables in Java. Learn the primitive types (and what that means) and just why variables are so important for any coding!

Java SE 10 (March 2018) introduced type inference for local variables. Java Language Architect Brian Goetz explains the feature.

Learn the four types of polymorphism in Java, then start using subtype polymorphism to execute different forms of the same Java method.

Covariance and contravariance might seem esoteric, but you'll need these concepts more than ever as the Java language evolves. Get started with type dependency in array types, generic types, and ...

The case for the Java var keyword Java has always had a weird syntax to declare variables. A manifest type declaration on the left side must polymorphically match up with the object type provided on ...