Polymorphism vs Strategy pattern

Question

What is the difference between the Strategy pattern and Polymorphism in Java?

I\'m confused that whatever is achieved via Strategy Pattern is

Answer 1

Polymorphism is a principle and Strategy is a design pattern

From oracle documentation page

The dictionary definition of polymorphism refers to a principle in biology in which an organism or species can have many different forms or stages. This principle can also be applied to object-oriented programming and languages like the Java language. Subclasses of a class can define their own unique behaviors and yet share some of the same functionality of the parent class.

Polymorphism can be achieved in compile time ( method overloading) and run time (method overriding).

Strategy_pattern

1. Defines a family of algorithms,
2. Encapsulates each algorithm, and
3. Makes the algorithms interchangeable within that family.

Strategy can use run-time polymorphism principle to achieve the desired functionality.

Strategy pattern had one more component called Context in it's URL diagram. Refer to below SE posts:

Real World Example of the Strategy Pattern

Does this Java Strategy pattern have a redundant Context class?

Few more useful articles:

strategy by sourcemaking