Public static void main()

[rohan yadav]

Is it always necessary to pass argument to public static void main() . i have run program throug eclipse and it says that it cant find main().

code:
class First()
{
public static void main()
{
System.out.println("Hello");
}
}

Whats the problem?
And is it necessary to pass argument(String[] args) to main()? If yes, then why?

[Vijitha Kumara]

i have run program throug eclipse and it says that it cant find main().
code:
class First()
{
public static void main()
{
System.out.println("Hello");
}
}
Whats the problem?
And is it necessary to pass argument(String[] args) to main()? If yes, then why?

No. Your main method's signature is wrong. You should add "(String[] args)" part as well, JVM will look for this signature when you execute the class.

[Anshul Agrawal]

The real answer is, of course, that this is just how they chose to do it. A non-static main() would have worked just as well; the JVM could create an instance of main()'s class to call it if it needed to. But since the JVM is designed to expect a static method, that's what you must use.

[Nitish Bangera]

May be the question is wrong. It is not necessary to pass arguments to public static void main() but it is mandatory to have a parameter of the String object i.e String[] or as of Java5 a var-arg String parameter i.e String...

[Vijitha Kumara]

Anshul Agrawal wrote:... A non-static main() would have worked just as well; the JVM could create an instance of main()'s class to call it if it needed to.

That would be an additional work for the JVM

[Atwal Usha]

Well, definitely the main method in Java needs to have a parameter which should be either String[] or String...(Java 5 onwards) and this is because that is the signature for the main method that the JVM expects.