why is the System.out.println(); line displaying error when i type void method in it?

[Vishal Hegde]

class Demo
{
public static void display()
{
int a[];
}
public static void main(String args[])
{
System.out.println(display()); //"error:void notallowed here why is that so??"
}
}

[Jelle Klap]

A method declared void doesn't return any kind of value, so it's not a valid argument to the println() method, or any other method for that matter.
What would you expect this code fragment to do?

[Vishal Hegde]

i was atleast expectting a runtime exception as array a not initialised

[Jelle Klap]

You'd need to get the code to compile before ever being able to see a RuntimeException, wouldn't you
As for the initialization of the local variable "a", you are correct to say that it never will be initialized, but it doesn't matter, because it is never used.
As soon as you try to access the variable "a" inside the display() method, the compiler will let you know that variable "a" still needs to be initialized.
Try it.

[Vishal Hegde]

yes true sorry how silly of me RunTime Exception comes before compilation