the strategy design pattern deals with how the classes interact with each other. This article explains strategy design pattern in Java with class diagrams and example code. Introduction – Strategy Design Pattern is a behavioral design pattern among the Gang Of Four(GOF) Article on GOF Patterns & their types Design Patterns. This article describes the idea in brief with an example on how to implementation it in Java. Strategy pattern In the Strategy Pattern, the behavior of a class or its algorithm can be changed at runtime. Wikipedia says. Strategy pattern allows choosing the best suited algorithm at runtime. In computer programming, the strategy pattern (also known as the policy pattern) is a behavioral software design pattern that enables selecting an algorithm at runtime. There are many java design patterns that we can use in our java based projects. I.e. A Strategy Pattern says that "defines a family of functionality, encapsulate each one, and make them interchangeable". Using design patterns promotes reusability that leads to more robust and highly maintainable code. This real-world code demonstrates the Strategy pattern which encapsulates sorting algorithms in the form of sorting objects. Programmatic Example This allows clients to dynamically change sorting strategies including Quicksort, Shellsort, and Mergesort. Trang chủ Design pattern Hướng dẫn Java Design Pattern – Strategy. Overview. This pattern is used to handle the software algorithms, manage interactions and responsibilities among objects to achieve a specific task. Hướng dẫn Java Design Pattern – Strategy. The strategy pattern is a behavioral design pattern that enables selecting an algorithm at runtime — Wikipedia public void processSpeeding (int speed); } Now we have two kinds of police officers. This type of design pattern is a behavioral pattern. It defines each behavior within its own class, eliminating the need for conditional statements. The policy object changes the execution algorithm of the context object. Strategy Pattern. Sunday, July 9, 2017 Strategy Design Pattern and Open Closed Principle in Java - Example Strategy design pattern is based upon open closed design principle, the 'O' of famous SOLID design principles. Strategy Pattern: Basic Idea. As, we’ve a clear picture of the strategy design pattern, let’s look into two examples in which we’ll work with the Java APIs to create real world use cases to better understand this pattern. Benefits: It provides a substitute to subclassing. Có một vài trường hợp, các lớp chỉ khác nhau về hành vi của chúng. Strategy Pattern Java Code Define a interface Strategy, which has one method processSpeeding () public interface Strategy { //defind a method for police to process speeding case. Step 1: Create an interface. Strategy design pattern is identified as a behavioral design pattern since it directly controls the object behaviors. The strategy design pattern (also known as the policy design pattern) is a behavioral design pattern that allows us to select an algorithm at runtime. The algorithms are interchangeable, meaning that they are substitutable for each other. SortStrategy.java Example for Strategy Design Pattern Implementation. Đăng vào 03/01/2019 Được đăng bởi GP Coder 11679 Lượt xem. The Strategy Pattern is also known as Policy. Design Patterns are already defined and provides industry standard approach to solve a recurring problem, so it saves time if we sensibly use the design pattern. The strategy design pattern is one of the common patterns found in the Java API library. This is very similar to another design pattern, called the State design pattern. The strategy pattern is also called the policy pattern. It's one of the popular pattern in the field of object-oriented analysis and design along with Decorator, Observer and Factory patterns. 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