problem in switch case

[Nittin singla]

In the following code, final int is considered as a constant but final Integer isnt considered so...So it results in a compile time error...Acc to me, final Integer is also a constant..Can someone please tell em the reason why compile time error comes?

final int iLoc = 3;
		final Integer iFour = 4;
		Integer iRef = 4;
		switch (iRef) {
		case 1:
		case iLoc:
		case 2 * iLoc:
		System.out.println("I am not OK.");
		default:
		System.out.println("You are OK.");
		case iFour:
		System.out.println("It’s OK.");
		}

[John Jai]

Nittin singla wrote:but final Integer isnt considered so...So it results in a compile time error...

Can you tell how you think it's not considered and wat is the error you receive

[John Jai]

Sorry nitin - i deciphered your question wrongly. Case does not allow wrapper ( or any other object). only primitives

[Henry Wong]

Nittin singla wrote:In the following code, final int is considered as a constant but final Integer isnt considered so...So it results in a compile time error...Acc to me, final Integer is also a constant..Can someone please tell em the reason why compile time error comes?

In addition to John's answer, a constant, specifically a compile time constant, is defined by the Java Language Specification. And in the current version of the specification, Integer instances are not to be considered as compile time constants.

Henry

[Rob Spoor]

Currently, Strings are the only non-primitive compile-time constants.