Can a main method in Java return something?

Question

I went through an interview recently and they ask me two questions in core Java.

Q 1.

Can we write a java class with:

public static int main(String[] args){      System.out.println("Hello"); 

I answered: No. The compiler won't compile it as it is expecting the return type of main to be int, though we can overload it.

Q 2: The next question I was unable to answer.

Write a program so that your Java main method could return something.

I.e. how can you make public static void main([] args) to return something?

Can any body help me to answer this?

Answer 1

Q 1. Can we write a java class with : public static int main(String[] args){

Yes, you can but you can't run that Java class.

Example class:

class MainTest {          public static int main(String[] args) {                 return 1;         } } 

You will receive an error message when trying to run it:

Error: Main method must return a value of type void in class MainTest, please  define the main method as:    public static void main(String[] args) 

Q 2: Next question I unable to answer. He asked write a program so that your java main method could return something.

You can use System#exit(int) to quit your program with a specific exit code which can be interpreted by the operating system.