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Jul 5, 2022 · Learn the object-oriented principle of cohesion, which refers to how a class is designed with a single, well-focused purpose. See examples of high and low cohesion, and the benefits and drawbacks of each.
Cohesion in Java. In this section, we will discuss about cohesion in Java. Cohesion defines how the classes in Java are designed. Cohesion in Java is the principle of Object-Oriented programming. Cohesion is closely related to ensuring that the purpose for which a class is getting created in Java is well-focused and single.
- Introduction
- Table of Contents
- What Is Cohesion?
- Benefits of High Cohesion
- Example: Low Cohesion vs High Cohesion
- Real-World Examples of Cohesion
- Conclusion
- GeneratedCaptionsTabForHeroSec
Cohesion is a measure of how closely related and focused the responsibilities of a single module or class are. In Object-Oriented Programming (OOP), a highly cohesive class is one that performs a single task or a group of related tasks, making the class easier to maintain and understand. High cohesion often correlates with low coupling, leading to ...
What is Cohesion?Benefits of High CohesionTypes of CohesionExample: Low Cohesion vs High CohesionCohesion refers to the degree to which the elements inside a module or class belong together. It describes how well the methods and properties of a class are related to each other. High cohesion means that a class is responsible for only one thing or a group of related things, while low cohesion means that a class has many unrelated responsibilitie...
Improved Maintainability: High cohesion makes classes easier to maintain and update because each class has a clear and focused responsibility.Enhanced Readability: Classes with high cohesion are easier to understand and reason about.Increased Reusability: Highly cohesive classes are more likely to be reused in different parts of an application or in different projects.Simplified Testing: Testing is easier for highly cohesive classes since they perform a single task or a group of related tasks.Example of Low Cohesion
In a class with low cohesion, responsibilities are scattered and unrelated, making the class difficult to maintain and understand.
Example of High Cohesion
In a class with high cohesion, responsibilities are related and focused, making the class easier to maintain and understand.
Explanation
1. LowCohesionClass: Contains methods that perform unrelated tasks such as calculating salary, printing reports, and sending emails. This makes the class difficult to understand and maintain. 2. High Cohesion Example: Responsibilities are divided into separate classes: Employee, SalaryCalculator, ReportPrinter, and EmailService. Each class has a single responsibility, making the code more modular and easier to maintain.
Example 1: Library System
In a library system, you can have classes like Book, LibraryMember, LibraryCatalog, and LoanService. Each class has a specific responsibility, such as managing book details, handling member information, maintaining the catalog, and managing book loans, respectively.
Example 2: E-commerce System
In an e-commerce system, you can have classes like Product, ShoppingCart, Order, and PaymentProcessor. Each class is responsible for a specific part of the system.
Cohesion is a critical concept in software design that affects the maintainability, readability, and reusability of a system. High cohesion within classes leads to a more modular and understandable codebase, making it easier to manage and extend. By focusing on creating highly cohesive classes, developers can build robust and scalable software syst...
Learn what cohesion is and how it affects the design and quality of Java classes. See examples of low and high cohesion, types of cohesion, and real-world applications of cohesion.
Jul 3, 2024 · Coupling refers to how much one part of a system relies on another, with lower coupling being better for flexibility. Cohesion is about how closely related and focused the responsibilities of a single module are, with higher cohesion being better for clarity and functionality.
Cohesion refers to what the class (or module) can do. Low cohesion would mean that the class does a great variety of actions - it is broad, unfocused on what it should do. High cohesion means that the class is focused on what it should be doing, i.e. only methods relating to the intention of the class.
Learn the concepts of coupling and cohesion in Java, and how they affect the design and quality of a class. See examples of tight and loose coupling, and low and high cohesion, with code and output.
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Dive into the principles of Java software design as we demystify coupling and cohesion. In this video, explore the delicate balance between the two, understand how they impact code quality, and...
