Design pattern use cases in java libraries and packages

inputStream in java io package is implemented using Decorator pattern.There will be lot more,please share those. This knowledge can give more hold on design patterns same time good understanding of design pattern implementation in java. Below are the list of design patterns.

1.Creational Design Pattern

Factory Pattern

Abstract Factory Pattern

Singleton Pattern

Prototype Pattern

Builder Pattern.

2. Structural Design Pattern

Adapter Pattern

Bridge Pattern

Composite Pattern

Decorator Pattern

Facade Pattern

Flyweight Pattern

Proxy Pattern

3. Behavioral Design Pattern

Chain Of Responsibility Pattern

Command Pattern

Interpreter Pattern

Iterator Pattern

Mediator Pattern

Memento Pattern

Observer Pattern

State Pattern

Strategy Pattern

Template Pattern

Visitor Pattern