Java’s interface language feature confuses many Java newbies. Many mistakenly assume that interfaces only sidestep Java’s failure to support multiple implementation inheritance. In reality ...

Polymorphism and Java inheritance. ... The main thing to keep in mind is that polymorphism requires an inheritance or an interface implementation. You can see this in the example below, ...

Sealed classes make Java an even more powerful and expressive language and set the stage for even more sophisticated techniques such as pattern matching, which we'll explore in a subsequent article. A ...

The original definition uses the word extension, which in Java implies inheritance. However, inheritance isn't the best way to implement the open-closed principle in Java. Open-closed principle ...