![]() ![]() A class which does more than a single task may be a good candidate to split and ensure that it performs a single task or responsibility. The single responsibility makes a class more robust. Martin) is defined as “Every class should have a single responsibility, and that responsibility should be entirely encapsulated by the class. ![]() The Single Responsibility Principle (term coined by Robert C. Single Responsibility Principle (SRP) and Strategy Design Pattern ![]() In other words proper Strategy pattern implementation satisfies the open-closed principle. This ensures that classes are closed for modification and open for extension. Also, the classes can switch between behaviors by changing the specific implementation used with very less or no code change. The behavior can be changed without breaking the classes that use it. This decouples the behavior and the class that uses this behavior. When design follows strategy pattern, the algorithmic behavior is separated out and implemented in separate interfaces and encapsulating subclasses. Strategy Pattern and Open-Closed Principle Single Responsibility Principle (SRP) and Strategy Design Pattern.Strategy Pattern and Open-Closed Principle.Suppose, we have created an interface named Conversion having three methods intToDouble(), intToChar(), and charToString(). Let's understand the principle through an example. The goal of the interface segregation principle is similar to the single responsibility principle. We should not force the client to use the methods that they do not want to use. Because the implementation classes use only the methods that are required. The principle states that the larger interfaces split into smaller ones. Hence, substituting the class Student with StudentBMI class may result in unexpected behavior. Therefore, the Student class (base class) cannot be replaced by StudentBMI class (derived class). The above classes violated the Liskov substitution principle because the StudentBMI class has extra constraints i.e. We should design the classes to preserve the property unless we have a strong reason to do otherwise. It extends the open-close principle and also focuses on the behavior of a superclass and its subtypes. In other words, if class A is a subtype of class B, then we should be able to replace B with A without interrupting the behavior of the program. It applies to inheritance in such a way that the derived classes must be completely substitutable for their base classes. The Liskov Substitution Principle (LSP) was introduced by Barbara Liskov. the approach would not affect the existing application. Similarly, we can add more vehicles by making another subclass extending from the vehicle class. By using the single responsibility principle, we can separate these functionalities into three separate classes to fulfill the goal of the principle. Hence, the Student class has three responsibilities to print the details of students, calculate percentages, and database. Suppose, Student is a class having three methods namely printDetails(), calculatePercentage(), and addStudent(). Let's understand the single responsibility principle through an example. It precise the code and the code can be easily maintained. Implementation of multiple functionalities in a single class mashup the code and if any modification is required may affect the whole class. The single responsibility principle states that every Java class must perform a single functionality. Let's explain the principles one by one in detail. ![]() In this section, we will discuss SOLID principles in Java with proper example. It also ensures that the software is modular, easy to understand, debug, and refactor. These five principles have changed the world of object-oriented programming, and also changed the way of writing software. In Java, SOLID principles are an object-oriented approach that are applied to software structure design. ![]()
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