PHASE 1: Core Java Mastery

PHASE 2: System Design in Java

PHASE 3: Spring

PHASE 4: Microservices with Spring Boot

PHASE 5: Java Testing (JUnit 5, Mockito, Integration Testing, TestContainers)

PHASE 6: Java Performance Tuning & Profiling

Mandatory

Mandatory

Optional

Optional

Optional

Optional

mindmap
  root("Java Learning Path")
    ("PHASE 1: Core Java")
      ("Object-Oriented Programming")
        ("Abstraction")
        ("Encapsulation")
        ("Inheritance")
        ("Polymorphism")
      ("Collections Framework")
        ("Lists")
        ("Sets")
        ("Maps")
        ("Queues")
      ("Generics")
        ("Generic Classes")
        ("Bounded Types")
        ("Wildcards")
      ("Multithreading")
        ("Thread Creation")
        ("Synchronization")
        ("Thread Pools")
        ("Concurrency Utilities")
    ("PHASE 2: System Design")
      ("Design Patterns")
        ("Creational Patterns")
          ("Singleton")
          ("Factory")
          ("Builder")
        ("Structural Patterns")
          ("Adapter")
          ("Decorator")
        ("Behavioral Patterns")
          ("Strategy")
          ("Observer")
    ("PHASE 3: Spring")
      ("Spring Core")
        ("IoC & DI")
        ("Bean Lifecycle")
        ("Bean Scopes")
        ("AOP")
    ("PHASE 4: Microservices")
      ("Spring Boot")
      ("Eureka")
      ("Feign")
      ("Resilience4j")
      ("Config Server")
    ("PHASE 5: Testing")
      ("JUnit 5")
      ("Mockito")
      ("Integration Testing")
      ("TestContainers")
    ("PHASE 6: Performance")
      ("JVM Tuning")
      ("GC Analysis")
      ("Profiling Tools")
      ("Memory Model")
      ("Performance Bottlenecks")

Reference

https://www.youtube.com/watch?v=PymbRTMb4hY&list=PL78RhpUUKSweClRi_l05UgfE3053-zkRf