What are the different ways to implement polymorphism in Java?

In Java, there are three primary ways to achieve polymorphism:

1. Method overloading is when multiple methods with the same name are defined in the same class, but with different parameter lists. The compiler will automatically choose the appropriate method to be called based on the actual parameters passed.
2. Method overriding: Subclasses can rewrite methods inherited from the parent class, and at runtime call the appropriate method based on the object’s actual type. The overridden method must have the same name and parameter list.
3. Interface Polymorphism is achieved by using interfaces. A single interface can be implemented by multiple classes, allowing different implementations to be called by using a reference variable of the interface type.