In Java, polymorphism results in code that is more concise and easier ... You’ll also learn about downcasting and runtime-type identification, and you’ll get a first look at covariant return ...

We will focus on the relationship between polymorphism ... while also improving your code. In this video, you can follow along while Rafael debugs and explains the Java polymorphism challenge ...

but as implemented in Java 8 and beyond, functional-style code is lazy—and that laziness makes for efficient operations because the runtime isn’t doing unnecessary work. Subramaniam ...