Complete Java Tutorial Roadmap for Beginners to Advanced

1. Java Fundamentals (Beginner Level)

1. Introduction to Java
2. Features of Java
3. JDK, JRE, and JVM
4. Java Program Structure
5. How Java Code Executes
6. Variables and Data Types
7. Operators
8. Input and Output
9. Type Casting
10. Conditional Statements
11. Looping Statements
12. Break and Continue
13. Arrays and Multi-dimensional Arrays
14. Strings and String Methods

2. Object-Oriented Programming in Java

1. Classes and Objects
2. Constructors and Types
3. Methods and Method Overloading
4. this and super keywords
5. Inheritance Types
6. Method Overriding
7. Access Modifiers
8. Polymorphism Concepts
9. Encapsulation and Getters/Setters
10. Abstraction using Abstract Classes
11. Interfaces and Multiple Inheritance
12. Default and Static Methods in Interfaces

3. Core Java Advanced Concepts

1. Exception Handling
2. try, catch, finally
3. throw and throws
4. Custom Exceptions
5. Collections Framework Overview
6. List, Set, Map Interfaces
7. ArrayList, LinkedList
8. HashSet, TreeSet
9. HashMap, LinkedHashMap, TreeMap
10. Iterator and ListIterator
11. Comparable and Comparator
12. Generics in Java
13. Wildcards
14. File Handling (FileReader, FileWriter)
15. Buffered Streams
16. Serialization and Deserialization
17. Java I/O Streams (Byte and Character Streams)

4. Java 8 and Later Features

1. Lambda Expressions
2. Functional Interfaces
3. Predicate, Function, Consumer, Supplier Interfaces
4. Streams API
5. Method References
6. Optional Class
7. Date and Time API
8. Default and Static Methods in Interfaces

5. Multithreading and Concurrency

1. Thread Basics
2. Creating Threads (Thread Class, Runnable Interface)
3. Thread Lifecycle
4. Thread Priority
5. Synchronization
6. Locks and Monitors
7. Deadlock, Livelock, Race Condition
8. Executor Framework
9. Callable and Future
10. ThreadPoolExecutor
11. ScheduledExecutorService
12. Concurrent Collections (ConcurrentHashMap, CopyOnWriteArrayList)

6. JDBC (Java Database Connectivity)

1. JDBC Architecture
2. Database Drivers
3. Establishing a Connection
4. Statements and PreparedStatement
5. CRUD Operations
6. Transactions
7. Batch Processing

7. Java Networking

1. Introduction to Sockets
2. ServerSocket and Client Socket
3. URL and HttpURLConnection
4. Java HTTP Client (Java 11+)

8. Java GUI Development

1. Basics of AWT
2. Swing Components
3. Event Handling
4. JavaFX Introduction

9. Build Tools and Project Setup

1. Maven Overview
2. pom.xml Structure
3. Gradle Overview
4. Project Directory Structure
5. Dependency Management

10. Unit Testing in Java

1. Introduction to JUnit
2. Test Lifecycle
3. Assertions
4. Testing Exceptions
5. Mocking with Mockito

11. JVM Internals and Performance

1. JVM Architecture
2. Class Loaders
3. Bytecode Execution
4. JIT Compiler
5. Garbage Collection
6. Heap, Stack, Metaspace
7. JVM Tuning Basics

12. Design Patterns in Java

1. Singleton
2. Factory
3. Builder
4. Prototype
5. Adapter
6. Decorator
7. Strategy
8. Observer

13. Java Backend Development

1. Servlets and JSP
2. Request and Response Model
3. Session Management
4. Spring Framework Overview
5. Spring Core
6. Spring MVC
7. Spring Boot
8. Spring Data JPA
9. Spring Security
10. Spring Cloud for Microservices

14. Java Projects for Practice

Beginner Projects

1. Calculator
2. Student Management System
3. Basic Notepad Application

Intermediate Projects

1. Expense Tracker
2. Employee Management System
3. Chat Application (Socket Programming)

Advanced Projects

1. E-commerce Backend Using Spring Boot
2. Hospital Management System
3. Microservices-Based Application

15. Java Interview Preparation

1. Core Java Interview Questions
2. OOP Concept Questions
3. Collections and Generics Questions
4. Exception Handling Questions
5. Multithreading Questions
6. JVM and GC Questions
7. Spring Boot Interview Questions
8. SQL and Database Questions
9. Coding Questions