*Java Developer Checklist (Beginner to Intermediate)* ✅ ☕ *Core Java Fundamentals* - [ ] Data Types, Variables, Operators - [ ] Control Statements (if, switch, loops) - [ ] Arrays & Strings - [ ] OOP Concepts (Class, Object, Inheritance, Polymorphism, Abstraction, Encapsulation) - [ ] Exception Handling (try-catch-finally, custom exceptions) - [ ] Java Collections (List, Set, Map, Queue) 🔁 *Intermediate Topics* - [ ] Generics - [ ] Multithreading & Concurrency - [ ] File I/O (BufferedReader, FileWriter, Scanner) - [ ] Lambda Expressions & Functional Interfaces - [ ] Java 8+ Features (Streams, Optional, Date/Time API) 🧪 *Practice & Tools* - [ ] Build Console-based Applications - [ ] Unit Testing with JUnit - [ ] Debugging in IDE (IntelliJ/Eclipse) - [ ] Version Control (Git + GitHub) 🌐 *Next Steps (Optional)* - [ ] Java with JDBC (Database Connection) - [ ] Java Web (Servlets/JSP or Spring Boot) - [ ] APIs & JSON Parsing - [ ] Maven or Gradle (Dependency Management) *React ❤️ for more*