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.

Key Takeaways Java 10 introduces a shiny new feature: type inference for local variables. For local variables, you can now use a special reserved type name “var” instead of actual type.

Value types are intended to be a third form of data type available in some future version of Java, to complement the currently-existing two: primitive types, and object references.