compile time constant and final variable

[Harsha Subbarayappa]

Can anyone please explain

what is the diff between initializing final variable in same line where it is declared and initializing in other line inside a method.

 
 
//constant expression required (case : x)

class SwitchExample{
	public static void main(String args[]){
		final int x; // final int x = 5; (works fine)
		x = 5;

		int i = 5;

		switch(i){
			case 2:
				System.out.println("two");
				break;
			case 3:
				System.out.println("three");
				break;
			case x:
				System.out.println("five");
				break;

			default:
				System.out.println("don't know");

		}
	}
}


  

[Wouter Oet]

A compile time constant is a final variable with a value at compile time (e.g. final int i=5;). A final variable is a variable that can only be assigned once. But that doesn't have to mean that is has a value at compile time (e.g. final int i; i=5);

The switch statement only accepts the first.

[Ankit Garg]

You can go through a tutorial like this to get info on the difference between the two...

[Harsha Subbarayappa]

it's the link to the same page....

[Ankit Garg]

Harsha Subbarayappa wrote:it's the link to the same page....

Oops, its fixed now

[Harsha Subbarayappa]

Thank you very much.