Design Pattern Java Examples

This repository contains Java examples for creational, structural, and behavioral design patterns. Each pattern folder includes a short explanation and a Mermaid diagram showing the main participants or flow.

Review Notes

See PATTERN_REVIEW.md for follow-up notes about examples that could better match the intent of their design pattern.

Patterns

Category	Pattern	Doc
Creational	Abstract Factory	abstract-factory.md
Creational	Builder	builder.md
Creational	Factory Method	factory-method.md
Creational	Prototype	prototype.md
Creational	Simple Factory Method	simple-factory-method.md
Creational	Singleton	singleton.md
Structural	Adapter	adapter.md
Structural	Bridge	bridge.md
Structural	Composite	composite.md
Structural	Decorator	decorator.md
Structural	Facade	facade.md
Structural	Flyweight	flyweight.md
Structural	Proxy	proxy.md
Behavioral	Chain of Responsibility	chain-of-responsibility.md
Behavioral	Command	command.md
Behavioral	Interpreter	interpreter.md
Behavioral	Iterator	iterator.md
Behavioral	Mediator	mediator.md
Behavioral	Memento	memento.md
Behavioral	Observer	observer.md
Behavioral	State	state.md
Behavioral	Strategy	strategy.md
Behavioral	Template Method	template-method.md
Behavioral	Visitor	visitor.md

Structure

flowchart TB
    subgraph Creational
        direction TB
        C1[Abstract Factory]
        C2[Builder]
        C3[Factory Method]
        C4[Prototype]
        C5[Simple Factory Method]
        C6[Singleton]
        C1 ~~~ C2 ~~~ C3 ~~~ C4 ~~~ C5 ~~~ C6
    end

    subgraph Structural
        direction TB
        S1[Adapter]
        S2[Bridge]
        S3[Composite]
        S4[Decorator]
        S5[Facade]
        S6[Flyweight]
        S7[Proxy]
        S1 ~~~ S2 ~~~ S3 ~~~ S4 ~~~ S5 ~~~ S6 ~~~ S7
    end

    subgraph Behavioral
        direction TB
        B1[Chain of Responsibility]
        B2[Command]
        B3[Interpreter]
        B4[Iterator]
        B5[Mediator]
        B6[Memento]
        B7[Observer]
        B8[State]
        B9[Strategy]
        B10[Template Method]
        B11[Visitor]
        B1 ~~~ B2 ~~~ B3 ~~~ B4 ~~~ B5 ~~~ B6 ~~~ B7 ~~~ B8 ~~~ B9 ~~~ B10 ~~~ B11
    end

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