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Linux OS
DevOps
- What is DevOps
- DevOps: Introduction
- DevOps: Agile and Microservices
- Infrastructure as code (IaC)
- Immutable Infrastructure
- Software Lifecycle
- Documentation
- How to document: Quarto and Obsidian
- Network protocols
- Network: Basics
- Network: Client-server
- Network Protocols
- Network: DNS
- Network: API Rest
- Network: gRPC
- Network: Websocket
- Network: SMTP
- Network: Ping
- Network: UDP
- Network: webhook
- Network: SOAP
- Network: graphQL
- Version Control
- Git
- GitHub
- Idea and GitHub 2023
- Git and GitHub 2023 CLI
- IDEs
- IDE: Visual Code
- IDE: IntellJIdea
- DevOps tools
- Amazon Web Services AWS
- Docker
- Jenkins pipelines
- Kubernetes k8s
- Digital Ocean
- Nagios
- Ansible
- DevOps Laboratories
- Lab 1: chat App
- Lab 2: Spring Boot AWS AEB manually
- Lab 3: Spring Boot and AWS S3 publisher
- Lab 4: Spring Boot Docker/Jenkins
- Lab 5: k8s on Digital Ocean
- Lab 6: Spring Boot AWS codecommit
- DevOps readings
- DevOps Resources
MarkUp
- MarkUp Languages
- Introduction Markup
- HTML Markup
- Markdown Markup
- Markdown and HTML working together, good idea?
- Quarto Markdown
- Quarto Markdown: basics
- Quarto Markdown: creating
- Quarto Markdown: publishing
- Quarto Markdown: code & data
- Quarto Markdown: api rest call
- Quarto Markdown: OJS Cells
- Quarto Markdown: cheat-sheet
- Styling: CSS
- Cascade Style Sheet
- CSS: W3.css
- MarkUp Languages Laboratories
- Lab#MD01-1: Create and publish by Quarto
- MarkUp Languages readings
- MarkUp Languages Resources
Java SE
- What is Java SE
- Java Standard Edition: Basics
- Java Standard Edition: Principles
- Java Standard Edition: JVM
- Java MOOC Helsinki
- Java MOOC Helsinki Syllabus
- Java Create Project
- Java SE: Maven
- Java SE: Create Maven Project
- Java SE: Project push GitHub
- Java SE: JUnit and TDD
- Java Concepts
- Java SE: Class and Objects
- Java SE: Scope
- Java SE: static modifier
- Java SE: Coupling and DDD
- Java SE: Packages
- Java SE: Abstract/Interface
- Java SE: Java 8
- Java Principles
- Java SE: Encapsulation
- Java SE: Abstraction
- Java SE: Inherence
- Java SE: Polymorphism
- Java Design Patterns
- Java Patterns: UML
- Java Patterns: Types
- Singleton
- Factory
- Abstract Factory
- Builder
- Facade
- Bridge
- Decorator
- Composite
- Observer
- Strategy
- State
- Commander
- Java SE Laboratories
- Lab#SE00-1: Maven Person
- Lab#SE00-2: Maven Clinic
- Lab#SE00-3: Library Model
- Lab#SE00-4: Abstract/Interface Human
- Lab#SE01-1: Maven/Gradle Person and Account
- Lab#SE01-2: Maven/Gradle Person and Account stored in JSON
- Lab#SE02-1: Movie/Review, Model
- Lab#SE02-2: Movie/Review, CRUD Operations
- Lab#SE02-3: Movie/Review, factory
- Lab#SE02-4: Movie/Review, interactivity and coupling
- Lab#SE02-5: Movie/Review, simulate interactivity by console
- Lab#SE03-1: Library/Book, Core-Model
- Lab#SE03-2: Library/Book, Sprint Zero
- Lab#SE03-3: Library/Book, Expand Model
- Lab#SE04-1: healthyFood Restaurant, Core Model
- Java SE readings
- Java SE Resources
Spring
- Spring Legacy
- Spring Framework
- Spring MVC
- Springs Servlets
- Spring Boot Basics
- Spring Boot: fundamentals
- Spring Boot: create a Project
- Spring Boot: H2 DB and Thymeleaf
- Spring Boot: cycle
- Spring Boot Concepts
- Spring Boot: Dependency Injection
- Spring Boot: Annotations
- Spring Boot: Controller
- Spring Boot: View
- Spring Boot: Thymeleaf
- Spring Boot: Vaadin Flow
- Spring Boot: Vaadin Hilla
- Spring Boot: Model
- Spring Boot: Rest
- Spring Boot: Data & DB
- Spring Boot: JPA & DI
- Spring Boot: JPA Mappings
- Spring Boot: JPA Relationships
- Spring Boot: JPA Queries
- Spring Boot: JPA Inherence
- Spring Boot: Scaling
- Spring Boot Laboratories
- Lab#SB00-1: Library UML
- Lab#SB00-2: CRUD User
- Lab#SB00-3: LibraryManagement
- Lab#SB00-4: API Rest
- Lab#SB00-5: Rest & JPA-H2
- Lab#SB00-6: Rest & MongoDB
- Lab#SB00-7: Styling
- Lab#SB01-1: DataBase
- Lab#SB02-1: JPA Relationships
- Lab#SB03-1: APIs & cloud
- Lab#SB04-1: JPA Inherence
- Lab#SB05-1: API Rest
- Lab#SB06-1: employeeCourse
- Lab#SB07-1: monitor Book
- Lab#SB08-1: Restaurant UML
- Lab#SB08-2: Vaadin
- Lab#SB08-3: H2 and API Rest
- Lab#SB08-4: JPA
- Lab#SB08-5: Test API Rest
- Lab#SB09-1: SpringIO Conference
- Spring Boot readings
- Spring Boot Resources
ReactJS
- ReactJS: Principles
- React JS: Introduction
- React JS: render virtual DOM
- React JS: Create a React project
- React JS: Components
- React JS: JSX
- React JS: props and state
- JavaScript: web scripting
- JavaScript: basics
- JavaScript: functions
- JavaScript: objects
- JavaScript: variables
- JavaScript: flux control
- ES6: ECMAScript 6
- React JS ES6: arrow functions
- React JS ES6: import modules
- React JS ES6: array, data and key
- React JS ES6: destructuring
- React JS ES6: spread operator
- ReacJS 18: Hooks
- React JS: Rules of Hooks
- ReactJS: useState
- React JS: useReducer
- React JS: useRef
- React JS: useEffect
- React JS: useContext
- ReactJS: useMemo
- ReactJS: custom hooks
- ReactJS: Designing an App
- React JS App: async
- React JS App: events
- React JS App: router
- React JS App: conditional render
- React JS App: styling
- React JS: Laboratories
- Lab#RE01-1: API Rest Axios
- Lab#RE02-1: Router & Hooks
- Lab#RE03-1: to-do app
- Lab#RE03-2: HighCharts
- Lab#RE03-3: API Rest Mono
- Lab#RE03-4: API Rest Domains
- Lab#RE03-5: data management
- Lab#RE04-1: todo & server
- Lab#RE04-2: Spring Boot & ReactJS
- Lab#RE05-1: chat & websockets
- Lab#RE05-2: chat: backend
- Lab#RE05-3: chat & AWS
- Lab#RE05-4: chat: test ws AWS
- Lab#RE05-5: chat & front
- Lab#RE05-6: chat & ws: front
- Lab#RE06-1: healthyFood Restaurant
- Lab#RE06-1-PR: create a pull request
- Lab#RE07-1: traffic lights simulation
- React JS readings
- ReactJS Resources
SCRUM
Learning
- Vocabulary
- General Vocabulary
- SCRUM Vocabulary
- DevOps Vocabulary
- Java SE Vocabulay
- Spring Boot Vocabulary
- DataBase Vocabulary
- ReactJS Vocabulary
- Web Vocabulary
- Learning
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- Learning: tips
- Writing
- Taking Notes
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- Document
- Auto-Evaluate
- Books & Articles
- Books table
- Books cards
- Articles table
- Articles cards
Training
- IFCD0021-26 Docs
- IFCD0021-26 Official Docs
- IFCD0021-26 Sprint Backlog
- IFCD0021-26 Product Backlog
- IFCD0021-26 Calendar & Deliveries
- Archived
- IFCD044-26 Docs
- IFCD044 Docs
- IFCD044 Sprint Backlog
- IFCD044 Product Backlog
- IFCD0210-26 Docs
- IFCD0210 Official Docs
- IFCD0210 Calendar & Deliveries
- IFCD0210 Sprint Backlog
- IFCD0210 Product Backlog
- IFCD0021-1-25 Docs
- IFCD0021-1-25 Official Docs
- IFCD0021-1-25 Calendar & Deliveries
- IFCD0021-1-25 Sprint Backlog
- IFCD0021-1-25 Product Backlog
- IFCD0210-25 Docs
- IFCD0210 Official Docs
- IFCD0210 Calendar & Deliveries
- IFCD0210 Sprint Backlog
- IFCD0210 Product Backlog
- IFCT116-24 Docs
- IFCT116 Official Docs
- IFCT116 Calendar & Deliveries
- IFCT116 Sprint Backlog
- IFCT116 Product Backlog
- IFCD0021-24 Docs
- IFCD0021 Official Docs
- IFCD0021 Calendar & Deliveries
- IFCD0021 Sprint Backlog
- IFCD0021 Product Backlog
- IFCD0210-24 Docs
- IFCD0210 Official Docs
- IFCD0210 Calendar & Deliveries
- IFCD0210 Sprint Backlog
- IFCD0210 Product Backlog
- IFCD044 Docs
- IFCD044 Docs
- IFCD044 Sprint Backlog
- IFCD044 Product Backlog
- IFCT034PO Docs
- IFCT034PO Docs
- IFCT034PO Sprint Backlog
- IFCT034PO Product Backlog
- IFCD0210 Docs
- IFCD0210 Official Docs
- IFCD0210 Init Mail
- IFCD0210 Deliveries
- IFCD0210 Calendar
- IFCD0210 Sprint Backlog
- IFCD0210 Product Backlog
- IFCD0210 Projects Backlog
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Java Design Patterns
Composite

Java Standard Edition
What is Java SE
Java Create Project
Java Concepts
Java Principles
Java Design Patterns
- Java Patterns: UML
- Java Patterns: Types
- Creational
- Singleton
- Factory
- Abstract Factory
- Builder
- Structural
- Facade
- Bridge
- Decorator
- Composite
- Behavioral
- Observer
- Strategy
- State
- Commander
Java SE Laboratories
Java SE readings
- Java SE Resources

Java Design Patterns
Composite

Composite

Java Fundamentals and Patterns

javase

composite

design-patterns

concepts

What is the Composite Structural Design-Pattern

Author

Rafa C.

Published

Tuesday, June 1, 2021

Modified

Monday, November 2, 2026

Attribution 4.0 International (CC BY 4.0)

If you want to go far, walk slow / We love dukkha

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