Thread: One Simple Question

Originally Posted by Shivafeb17

If I have class1, class2 and class3...Why cannot I use the file name of the class that contains the main()?

You can compile any blasted, bloomin' thing you want.

However to execute a Java application program, you need a public class with a public static void main(String [] args){} method. Like it or not, that is the rule.

To start execution with that main() method in that class, the file must be named according to the name of that public class (with a .java extension).

Reference: Java Tutorial Essentials, Part 1, Lesson 1: Compiling and Running a Simple Program

Still puzzled?

Then create a file with whatever classes and methods you want. Give the file whatever name suits your fancy.

Try to compile it.

If it compiles successfully, try to execute something in it.

If it doesn't work, look at the compiler error message(s) and if you still don't get it, show the exact, entire code and show the exact, complete message(s) and ask about whatever you don't understand.



Cheers!

Z

Correct me if I'm wrong, do you want to know why

public static void main(String Args[]) { }

is needed?

As Zaphod_b said:

You can compile any blasted, bloomin' thing you want.

But in order to actually execute something at all, you'll have to include a main class somewhere. This is because Java executes the lines within the main first and foremost. Without it, stupid Java won't know where to start.