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 ...

Use Java's packages and static imports to organize top-level types and simplify access to their static members.

Explore Java's latest feature, Pattern Matching for Switch. Understand its enhancements, including support for any reference type, new case labels, guarded patterns, and more!

Intro to Java Interfaces An interface is a reference type in Java. Interfaces are a completely abstract type that is used to specify a behavior that classes must implement.

Mainly, the problem is that the dash in a kebab-cased variable can be easily confused with a minus sign, which can make reading and troubleshooting difficult. To steer clear of any confusion or ...

This is not a primitive type in Java, but rather a reference type: in this case it “points” to a class that can have multiple values and methods. Once you have initialized an instance of a ...

Learn about the new Java 10 "var" type, and experiment using JShell with this hands-on tutorial on how to reduce boilerplate code using new type inference for local variables.