Topic 1: Object-Oriented Programming (OOP) in Java

Topic 2: Java Collections Framework (JCF)

Topic 3: Generics in Java

Topic 4: Multithreading & Concurrency in Java

Topic 5: Java 8+ Features — Lambdas, Streams, and Optionals

Topic 6: Exception Handling & Best Practices in Java

Topic 7: JVM Internals & Garbage Collection