Core Java

Strong fundamentals are the foundation of great Java developers. These tutorials cover essential concepts—from the static keyword and memory management to object-oriented principles and serialization.

Core Java Articles

Frequently Asked Questions (FAQ)

I'm completely new to Java. Where should I start?

Start with "Gentle Introduction to Programming with Java" to understand basic syntax and concepts. Then move to " Understanding the Main Method" to see how Java programs execute.

Why is understanding hashCode() and equals() important?

Collections like HashMap and HashSet rely on these methods to store and retrieve objects correctly. Implementing them wrong causes subtle bugs that are hard to debug.

What's the difference between final, finally, and finalize?

They're completely different. 'final' makes variables constant, 'finally' is a try-catch block for cleanup code, and ' finalize()' is deprecated for garbage collection. Our article clarifies all three.

Is Java pass-by-value or pass-by-reference?

Java is always pass-by-value, but this confuses many developers when dealing with objects. Our tutorial explains exactly what happens when you pass objects to methods.

Do I need to learn serialization in modern Java?

While JSON is more common for data exchange, serialization is still used for caching, session management, and deep copying objects. Understanding it helps you appreciate why JSON libraries exist.

Should I use static methods everywhere?

No. Static methods are useful for utility functions but overusing them leads to code that's hard to test and maintain. Our article explains when static makes sense.