Additional Notes
How do reference type and runtime type affect method execution?
Track: Java
Topic: Core Java
Focus: Upcasting and Dynamic Dispatch
Java: Upcasting and Dynamic Dispatch
Answer
The reference type determines accessible methods; the runtime type determines the executed method.
In Java, the reference type controls which methods are accessible at compile-time, but the actual method body that runs is determined by the object’s runtime type. For example, if `Product p = new Book();`, calling `p.display()` will execute `Book`'s `display()` method if it overrides `Product`'s `display`.
In Java, the reference type controls which methods are accessible at compile-time, but the actual method body that runs is determined by the object’s runtime type. For example, if `Product p = new Book();`, calling `p.display()` will execute `Book`'s `display()` method if it overrides `Product`'s `display`.
Topics: Core Java Java Upcasting and Dynamic Dispatch