Can there exist two main methods in a Java program

Question

Can there exist two main methods in a Java program? Only by the difference in their arguments like:

public static void main(String[] args)

and second can be

public static void main(StringSecond[] args)

If it is possible,which Method will be used as the entry point? How to identify this? please help.

Answer 1

the possibility of two main(String[] args) methods within the same scope create confusion for the JVM. It fails to use them as overloaded methods. So the signatures in terms of parameters) must be different.

Answer 2

The below code in file "Locomotive.java" will compile and run successfully, with the execution results showing

2<SPACE>

As mentioned in above post, the overload rules still work for the main method. However, the entry point is the famous psvm (public static void main(String[] args))

public class Locomotive {
    Locomotive() { main("hi");}

    public static void main(String[] args) {
        System.out.print("2 ");
    }

    public static void main(String args) {
        System.out.print("3 " + args);
    }
}

Answer 3

Only public static void main(String[] args) counts. This is the only signature considered to be the true main() (as the program entry point, I mean).

Answer 4

In Java, you can have just one public static void main(String[] args) per class. Which mean, if your program has multiple classes, each class can have public static void main(String[] args). See JLS for details.