README.md

Bridge Pattern

What is the Bridge Pattern?

The Bridge Pattern is a structural design pattern that lets you split a large class or a set of closely related classes into two separate hierarchies—abstraction and implementation—which can be developed independently of each other.

Implementation in This Project

This example demonstrates the Bridge pattern by drawing circles with different colors using different implementations:

• Shape: Abstraction class.
• Circle: Refined abstraction.
• DrawAPI: Implementor interface.
• RedCircle, GreenCircle: Concrete implementors.

Class Diagram

flowchart TD
    subgraph Client
        A["App.java"]
    end
    subgraph Abstraction
        B["Shape (abstract)"]
        C["Circle"]
    end
    subgraph Implementor
        D["DrawAPI (interface)"]
        E["RedCircle"]
        F["GreenCircle"]
    end
    A --> C
    C --> B
    C --> D
    D --> E
    D --> F
    E --> D
    F --> D

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Example Usage

Circle redCircle = new Circle(100, 100, 10, new RedCircle());
Circle greenCircle = new Circle(100, 100, 10, new GreenCircle());

redCircle.draw();
greenCircle.draw();

When to Use

• When you want to avoid a permanent binding between an abstraction and its implementation.
• When both the abstractions and their implementations should be extensible by subclassing independently.