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. 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 Products
class ConcreteProductA implements Product {
    public void use() { System.out.println("Using Product A"); }
}

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

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

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

This code defines a factory that creates different products based on the input type.

What are the benefits of using the factory pattern?

The factory pattern promotes loose coupling, enhances code maintainability, and allows for easier testing and scalability.