# Polymorphism with Interfaces

Using an interface as a variable's type lets you treat an object as just one of its roles, such as treating a Teenager as a Student or a team as a list of Athletes.

![Cheat sheet: Polymorphism with Interfaces](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/549709d2d5684a54bd487dbcd53d0fb7.webp)

- Category: Java
- Level: Freelancer
- Tags: java, OOP
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/what-is-polymorphism-polymorphism-with-interfaces-cheat-sheet