Java Design Patterns: A Hands-On Experience with Real-World Examples

© The Author(s), under exclusive license to APress Media, LLC, part of Springer Nature 2022

V. SarcarJava Design Patternshttps://doi.org/10.1007/978-1-4842-7971-7_21

21. Strategy Pattern

Vaskaran Sarcar¹  

(1)

Garia, Kolkata, India

 

This chapter covers the Strategy pattern. It is also known as the Policy pattern.

GoF Definition

It defines a family of algorithms, encapsulates each one, and makes them interchangeable. The Strategy pattern lets the algorithm vary independently from the clients that use it.

Concept

A client can select an algorithm from a set of algorithms dynamically at runtime. This pattern also provides a simple way to use the selected algorithm.

You know that an object can have states and behaviors. And some of these behaviors may vary among ...