Using generics results in more robust code and avoids ClassCastExceptions in your Java programs ... code fragment creates a list of strings based on an array list. It then upcasts this list ...

We will focus on the relationship between polymorphism and Java inheritance. The main thing to keep in mind is that polymorphism requires an inheritance or an interface implementation. You can see ...

As you can see in the following var examples, the left-hand side of the assignment does not reference a Java types such as long, double or ArrayList ... the contrast between the explicit type ...