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

Get started with polymorphism in Java and how to do method invocation in polymorphic method calls.

A team of computer scientists has developed a videogame called CodeSpells that teaches people how to code in Java. The game was tested on a group of 10- to 12-year-old girls who had never done any ...