How do I implement the Factory Pattern in Java?

How do I implement the Factory Pattern in Java?

The Factory Pattern is a creational design pattern that provides an interface for creating objects in a superclass, but allows subclasses to alter the type of objects that will be created. Would you like a code example?

Yes, please provide a code example.

Sure! Here's a simple example:

// Product interface
interface Product {
    void use();
}

// Concrete Product A
class ProductA implements Product {
    public void use() {
        System.out.println("Using Product A");
    }
}

// Concrete Product B
class ProductB implements Product {
    public void use() {
        System.out.println("Using Product B");
    }
}

// Factory class
class ProductFactory {
    public static Product createProduct(String type) {
        if (type.equals("A")) {
            return new ProductA();
        } else if (type.equals("B")) {
            return new ProductB();
        }
        return null;
    }
}

// Usage
public class Main {
    public static void main(String[] args) {
        Product product = ProductFactory.createProduct("A");
        product.use(); // Output: Using Product A
    }
}

What are the advantages of using the Factory Pattern?

The Factory Pattern promotes loose coupling by eliminating the need to bind application-specific classes into your code. It also enhances code maintainability and scalability.