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**Fundamentos**

| # | Módulo | Contenido |
|---|---|---|
| 01 | [Lambdas](src/01-Lambdas/) | Funciones anónimas, interfaces funcionales, referencias a métodos |
| 02 | [Streams](src/02-Streams/) | Pipeline lazy, operaciones intermedias/terminales, ejercicios x30 |
| 03 | [Optional](src/03-Opcional/) | Optional.of/ofNullable, map/flatMap, orElse/orElseGet |
| 04 | [Genéricos](src/04-Genericos/) | Wildcards, bounded types, PECS |
| 05 | [Excepciones](src/05-Excepciones/) | Checked/unchecked, try-with-resources, custom exceptions |
| 06 | [Clases Abstractas](src/06-Clases-Abstractas/) | abstract vs interface, cuándo usar cada una |

**Colecciones**

| # | Módulo | Contenido |
|---|---|---|
| 07 | [Lista](src/07-Colecciones-Lista/) | ArrayList, LinkedList, Vector, Stack |
| 08 | [Mapa](src/08-Colecciones-Mapa/) | HashMap, LinkedHashMap, TreeMap, WeakHashMap |
| 09 | [Conjunto](src/09-Colecciones-Conjunto/) | HashSet, LinkedHashSet, TreeSet, EnumSet |
| 10 | [Cola](src/10-Colecciones-Cola/) | Queue, PriorityQueue, ArrayDeque, BlockingQueue |
| 11 | [Deque](src/11-Colecciones-Deque/) | ArrayDeque, ConcurrentLinkedDeque, LinkedList como Deque |
| 12 | [Concurrentes](src/12-Colecciones-Concurrentes/) | ConcurrentHashMap, CopyOnWriteArrayList, BlockingQueue |
| 13 | [Utilidades](src/13-Colecciones-Utilidades/) | Collections, Comparable, Comparator, Iterator, Iterable |

**Concurrencia**

| # | Módulo | Contenido |
|---|---|---|
| 14 | [Concurrencia](src/14-Concurrencia/) | synchronized, volatile, ReentrantLock, Semaphore, wait/notify |
| 15 | [Async](src/15-Concurrencia-Asincrona/) | ExecutorService, CompletableFuture, allOf, exceptionally |
| 16 | [Virtual Threads](src/16-Hilos-Virtuales/) | Java 21, carrier threads, pinning, I/O-bound vs CPU-bound |
| 17 | [Recolector de Basura](src/17-Recolector-de-Basura/) | Generaciones, G1GC, ZGC, stop-the-world, JVM flags |

**Principios y Patrones**

| # | Módulo | Contenido |
|---|---|---|
| 18 | [SOLID](src/18-SOLID/) | SRP, OCP, LSP, ISP, DIP con ejemplos de violación y corrección |
| 19 | [Patrones de Diseño](src/19-Patrones-de-Diseno/) | Singleton, Factory, Builder, Adapter, Decorator, Strategy, Observer |
| 20 | [AOP](src/20-AOP/) | Aspect, Pointcut, @Before, @Around, @AfterReturning, weaving |

**Spring**

| # | Módulo | Contenido |
|---|---|---|
| 21 | [Spring Core: IoC](src/21-Spring-Core-IoC/) | Inversion of Control, DI por constructor/setter/campo, @Qualifier |
| 22 | [Spring Core: Beans](src/22-Spring-Core-Beans/) | Ciclo de vida, @PostConstruct, @PreDestroy, scopes |
| 23 | [Spring Boot: Config](src/23-Spring-Boot-Config/) | application.yml, @Value, @ConfigurationProperties, precedencia |
| 24 | [Spring Boot: Starters](src/24-Spring-Boot-Starters/) | Autoconfiguración, @SpringBootApplication, @ConditionalOnMissingBean |
| 25 | [Spring Boot: Perfiles](src/25-Spring-Boot-Perfiles/) | @Profile, application-{env}.yml, SPRING_PROFILES_ACTIVE |
| 26 | [Spring Boot: Logging](src/26-Spring-Boot-Logging/) | SLF4J, Logback, niveles, MDC, logging estructurado |

**DevOps**

| # | Módulo | Contenido |
|---|---|---|
| 27 | [Docker](src/27-DevOps-Docker/) | Image, Container, Dockerfile, docker-compose |
| 28 | [Kubernetes](src/28-DevOps-Kubernetes/) | Pod, Deployment, Service, HPA, ConfigMap, Secret |
| 29 | [IaC](src/29-DevOps-IaC/) | Terraform (HCL, plan/apply), Ansible (playbooks, idempotencia) |
| 30 | [Pipelines](src/30-DevOps-Pipelines/) | GitHub Actions, Jenkins, GitLab CI |

**Herramientas**

| # | Módulo | Contenido |
|---|---|---|
| 31 | [Git](src/31-Herramientas-Git/) | merge vs rebase, stash, cherry-pick, fetch vs pull |
| 32 | [Maven](src/32-Herramientas-Maven/) | pom.xml, ciclo de vida, dependencias transitivas, perfiles |
| 33 | [Gradle](src/33-Herramientas-Gradle/) | DSL Kotlin/Groovy, Wrapper, compilación incremental |

**Spring Avanzado**

| # | Módulo | Contenido |
|---|---|---|
| 34 | [Spring MVC](src/34-Spring-MVC/) | DispatcherServlet, @RestController, @ControllerAdvice, @Valid, @ExceptionHandler |
| 35 | [JPA / Hibernate](src/35-JPA-Hibernate/) | Entidades, relaciones, fetch types, @Transactional, N+1, caché L2 |
| 36 | [Testing](src/36-Testing/) | JUnit 5, Mockito, @SpringBootTest, TDD, test doubles |
| 37 | [Spring Security](src/37-Spring-Security/) | SecurityFilterChain, JWT, BCrypt, @PreAuthorize, OAuth2 |

**Kafka y Arquitecturas**

| # | Módulo | Contenido |
|---|---|---|
| 38 | [Kafka](src/38-Kafka/) | Topics, particiones, producers, consumers, offsets, DLT, Saga |
| 39 | [Microservicios](src/39-Microservicios/) | Circuit Breaker, Saga, API Gateway, Outbox Pattern, Two-Phase Commit |
| 40 | [Arquitecturas](src/40-Arquitecturas/) | Hexagonal, Clean Architecture, CQRS, Event Sourcing, DDD |

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