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Factory Pattern Using Java 8 Lambda Expressions — Best Practice
Explore the Factory Design Pattern and its implementation using Java 8 Lambda expressions
Introduction
In this article, we will explore the Factory Design Pattern and its implementation using Java 8 Lambda expressions. The Factory Pattern falls under the Creational Design Pattern category, providing a structured way to instantiate objects dynamically.
Definition of Factory Design Pattern
“Define an interface for creating an object, but let subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.” — Head First Design Patterns
We will first implement the Factory Pattern without lambda expressions, then see how we can simplify it using Java 8 Lambda Expressions and Method References.
Factory Design Pattern: Traditional Implementation (Without Lambda Expressions)
Step 1: Create an Interface (Shape.java
)
public interface Shape {
void draw();
}