# Polymorphism

Using one declared type to work with objects that provide different implementations.

## What is **Polymorphism** in Java?

**Polymorphism** — Using one declared type to work with objects that provide different implementations.

```java
class Alert {
    String text() {
        return "Alert";
    }
}

class EmailAlert extends Alert {
    @Override
    String text() {
        return "Email";
    }
}
```

Level: Journeyman · [More Java terms at this level](https://www.ask-codey.com/glossary/subjects/java/journeyman)

Updated: September 27, 2026

## In other subjects

- [Polymorphism in C#](https://www.ask-codey.com/glossary/polymorphism-c-sharp)
- [Polymorphism in JavaScript](https://www.ask-codey.com/glossary/polymorphism-javascript)
- [Polymorphism in OOP](https://www.ask-codey.com/glossary/polymorphism-oop)

Source: https://www.ask-codey.com/glossary/polymorphism-java