Java main() Method Interview Questions with Answers

Looking for a simple and complete guide to Java’s main() method interview questions? You’re in the right place!

In this article, we’ll explore some of the most commonly asked questions about the main() method in Java. Whether you’re a fresher preparing for your first interview or an experienced developer brushing up, these questions will help you feel confident and interview-ready.

1. Why is the main() method public and static?

Let’s start with static.

The JVM calls the main() method to start your program. But here’s the catch — it doesn’t create an object of your class. So, the method must be static. That way, JVM can call it directly using the class name.

If it were non-static, the JVM would have to instantiate your class. But what if your class had multiple constructors?

public class MainMethodDemo {

    public MainMethodDemo(int a) { }

    public MainMethodDemo(String[] args) { }

    public void main(String[] args) {
        // Not static!
    }
}

JVM won’t know which constructor to pick — and it can’t just guess! That’s why main() must be static.

Now, why is it public?

Because the JVM is outside your class. If main() isn’t public, JVM won’t be able to access it. Simple as that!

2. Can we overload the main() method in Java?