Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs. Abstract classes and ...

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 ...

Imagine you are an expert object-oriented Java developer who meticulously crafts code the way an artist cares for their masterpiece. You believe clean code is an absolute necessity. Classes with clear ...

Java is one of the most highly sought after programming languages, not to mention one of the two official languages for Android development. In this Java beginner course, we’ll go over the basics to ...

Due to Java’s Reflection API we have been able to inspect and alter program execution at runtime. In particular, we can observe interfaces/classes/methods and fields at runtime without knowing their ...