java設計模式大全 Design pattern samples in Java(最經典最全的資料)__Java

Design pattern samples in Java. Build status:

Introduction

Design patterns are formalized best practices that the programmer can use to solve common problems when designing an application or system.

Design patterns can speed up the development process by providing tested, proven development paradigms.

Reusing design patterns helps to prevent subtle issues that can cause major problems, and it also improves code readability for coders and architects who are familiar with the patterns. List of Design Patterns Creational Patterns

Creational design patterns abstract the instantiation process. They help make a system independent of how its objects are created, composed, and represented. Abstract Factory Builder Factory Method Prototype Property Singleton Multiton Object Pool Structural Patterns

Structural patterns are concerned with how classes and objects are composed to form larger structures. Adapter Bridge Composite Decorator Facade Flyweight Proxy Service Locator Servant Event Aggregator Behavioral Patterns

Behavioral patterns are concerned with algorithms and the assignment of responsibilites between objects. Chain of responsibility Command Interpreter Iterator Mediator Memento Observer State Strategy Template method Visitor Null Object Intercepting Filter Specification Dependency Injection Concurrency Patterns

Concurrency patterns are those types of design patterns that deal with the multi-threaded programming paradigm. Double Checked Locking Thread Pool Presentation Tier Patterns

Presentation Tier patterns are the top-most level of the application, this is concerned with translating tasks and results to something the user can understand. Model-View-Controller Model-View-Presenter Flux Architectural Patterns

An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture within a given context. Data Access Object Service Layer Integration Patterns

Integration patterns are concerned with how software applications communicate and exchange data. Tolerant Reader Idioms

A programming idiom is a means of expressing a recurring construct in one or more programming languages. Generally speaking, a programming idiom is an expression of a simple task, algorithm, or data structure that is not a built-in feature in the programming language being used, or, conversely, the use of an unusual or notable feature that is built into a programming language. What distinguishes idioms from patterns is generally the size, the idioms tend to be something small while the patterns are larger. Execute Around Poison Pill Callback Lazy Loading Double Dispatch Resource Acquisition Is Initialization Private Class Data Abstract Factory ↑

Intent: Provide an interface for creating families of related or dependent objects without specifying their concrete classes.

Applicability: Use the Abstract Factory pattern when a system should be independent of how its products are created, composed and represented a system should be configured with one of multiple families of products a family of related product objects is designed to be used together, and you need to enforce this constraint you want to provide a class library of products, and you want to reveal just their interfaces, not their implementations

Real world examples: