Learn the four types of polymorphism in Java, then start using subtype polymorphism to execute different forms of the same Java method.

In the following var examples, it’s not difficult for the reader to logically infer the type of each variable. Furthermore, the contrast between the explicit type declaration and the use of the var ...

Type erasure in Java generics programming can cause a variety of problems in your code. Fortunately, there are ways to work around them.