Rajesh Kushwah

As a Java developer, you would be working with one of the most popular and widely used programming languages, especially in enterprise environments. Here are some key areas related to being a Java developer:

1. Core Java
Object Oriented Programming OOP: Java is based on OOP principles Encapsulation, Inheritance, Polymorphism, Abstraction, and mastering these is crucial.
Memory Management: Understanding the Java memory model, garbage collection, heap vs. stack memory, and how the JVM works.
Multithreading & Concurrency: Java provides powerful tools like threads, the ExecutorService, and other concurrency utilities.
Collections Framework: Mastering the List, Map, Set, and their implementations is vital for any Java project.
Exception Handling: Proper usage of try, catch, finally, and custom exceptions is essential to build resilient applications.
2. Java Frameworks
Spring Framework: Spring is one of the most widely used frameworks for building web and enterprise applications. Key ar