Polymorphism with the core Java classes. We use polymorphism all the time in the core Java classes. One very simple example is when we instantiate the ArrayList class declaring the List interface ...

In Java, polymorphism results in code that is more concise and easier to maintain. This tutorial provides an overview of the four types of Java polymorphism, but our focus is subtype polymorphism.

LSP example in Java. The calcArea method in the Main class takes a Rectangle as an argument. However, a Square inherits from Rectangle and thus it is a special type of Rectangle, so we can legally ...