1.    Introduction to Java
2.    Java Development Environment Setup
3.    Variables and Data Types
4.    Operators
5.    Control Flow Statements (if-else, switch-case, loops)
6.    Arrays
7.    Object-Oriented Programming (OOP) Concepts
8.    Classes and Objects
9.    Constructors
10.    Methods and Functions
11.    Inheritance
12.    Polymorphism
13.    Encapsulation
14.    Abstraction
15.    Packages and Import Statements
16.    Access Modifiers (public, private, protected)
17.    Interfaces
18.    Abstract Classes
19.    Exception Handling
20.    Checked and Unchecked Exceptions
21.    Try-Catch-Finally Blocks
22.    Exception Propagation
23.    Custom Exception Classes
24.    Strings and String Manipulation
25.    Regular Expressions (Regex)
26.    Collections Framework
•    Lists (ArrayList, LinkedList)
•    Sets (HashSet, TreeSet)
•    Maps (HashMap, TreeMap)
•    Queues (PriorityQueue)
27.    Generics
28.    Iterators
29.    Autoboxing and Unboxing
30.    Enumerations (Enums)
31.    File I/O (Input/Output)
32.    Streams (Byte Streams and Character Streams)
33.    Serialization and Deserialization
34.    Concurrency
•    Threads
•    Synchronization
•    Thread Pools
•    Executors
•    Concurrent Collections
35.    Java Memory Management
•    Stack vs Heap
•    Garbage Collection
•    Finalize Method
36.    Annotations
37.    Reflection
38.    Java I/O (Input/Output) API
39.    Networking (Socket Programming)
40.    JDBC (Java Database Connectivity)
41.    JavaFX Basics (GUI Programming)
42.    Event Handling
43.    Layout Management
44.    JavaFX Controls
45.    CSS Styling in JavaFX
46.    Basic Java Applets
47.    Lambda Expressions
48.    Stream API
49.    Optional Class
50.    Module System (Java 9 and later)