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In today’s fast-paced digital world, ensuring timely and reliable communication with users is crucial for businesses. Whether it’s a transaction alert, a promotional email, or an SMS notification, the need for a system that can handle massive volumes of messages efficiently is more important than ever. Enter the Scalable Notification System—a robust architecture designed to…
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Clean code is a philosophy that emphasizes writing code that is easy to read, understand, and maintain. In Java, clean code practices are crucial for creating software that is not only functional but also scalable and resilient to changes. Here’s a comprehensive strategy for achieving clean code in Java: 1. Meaningful Names Classes and Methods:…
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When writing Java code, maintaining clarity and precision in your imports is key to ensuring that your code is clean and easy to understand. Using wildcard imports (*) can obscure which classes are actually being used and make your code less maintainable. To prevent IntelliJ IDEA from automatically using wildcard imports, follow this guide to…
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High-level modules should not depend on low-level modules. Both should depend on abstractions. Example: Consider a Light class that directly controls a Switch. // Violation of DIP public class LightSwitch { private Light light; public LightSwitch(Light light) { this.light = light; } public void turnOn() { light.turnOn(); } public void turnOff() { light.turnOff(); } }…
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Clients should not be obligated to rely on interfaces they don’t utilize. Example: Consider an interface that imposes irrelevant methods on implementing classes. // Violation of ISP public interface Worker { void work(); void eat(); } public class HumanWorker implements Worker { public void work() { System.out.println(“Human working”); } public void eat() { System.out.println(“Human eating”);…
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Subtypes must be substitutable for their base types. Example: Consider a scenario with a base class Bird and a derived class Penguin. // Violation of LSP public class Bird { public void fly() { System.out.println(“Flying”); } } public class Penguin extends Bird { @Override public void fly() { throw new UnsupportedOperationException(“Penguins can’t fly”); } }…
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Software entities should be open for extension but closed for modification. Example: Let’s say you have a class that calculates the area of different shapes. // Violation of OCP public class AreaCalculator { public double calculateArea(Object shape) { if (shape instanceof Circle) { Circle circle = (Circle) shape; return Math.PI * circle.getRadius() * circle.getRadius(); }…
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A class should have only one reason to change. Example: Consider a class that handles both user data and its formatting. This violates SRP. // Violation of SRP public class User { private String name; private String email; public User(String name, String email) { this.name = name; this.email = email; } // Responsibility 1: Managing…
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The SOLID design principles in Java are a set of guidelines that help developers create robust, scalable, and maintainable software. These principles are foundational in object-oriented programming and play a critical role in ensuring that your codebase remains flexible and adaptable as it evolves. Let’s break down what SOLID means and why it’s essential: 1.…