Java basics: syntax, variables, loops, methods.
OOP (Classes, Objects, Inheritance, Polymorphism, Encapsulation).
Collections Framework (List, Set, Map).
Exception handling.
File I/O & Streams.
Multithreading & Concurrency.
JDBC (Java Database Connectivity).
Frameworks (Spring, Hibernate).
REST APIs with Spring Boot.
Deployment (Tomcat, Docker, Cloud).
Java Fundamentals: The Java Language.
Spring Boot Fundamentals.
HackerRank (Java track) – Great for interview prep.
LeetCode (Java problems) – For competitive programming & DSA.
Codeforces / CodeChef – Problem-solving in Java.
Java EE: Building Enterprise Applications.
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