If Statement Limitation?

[Karen Baog]

What is the limitation of using the if statement?
long longMaxValue;


if(longMaxValue >=9223372036854775807)
{
}

This would flag an error, stating that "integer number is too large" when the longMaxValue is declared type long.

But if I write it this way, it wouldn't flag an error:
if(longMaxValue >= Long.MAX_VALUE)
{
}

Why?

[ July 17, 2005: Message edited by: Karen Baog ]

[ July 17, 2005: Message edited by: Karen Baog ]
[ July 17, 2005: Message edited by: Karen Baog ]

[Steve Simon Joseph Fernandez]

Hi Karen,

You should postfix 'L' to the number to indicate that it's a long constant. I think by default, all numeric constants are taken by java as int unless otherwise specified. This works:

 
        long longMaxValue=0;
        if(longMaxValue >=9223372036854775807L)

_steve.

[Stuart Gray]

The two numbers you posted are the same - the character at the end of the first one is a lowercase 'L', not a one, used to indicate the value is a long.

But to be absolutely sure of the value, why don't you just do this:

System.out.println(Long.MAX_VALUE);

[Sonny Gill]

Originally posted by Steve Simon Joseph Fernandez:

I think by default, all numeric constants are taken by java as int unless otherwise specified.
_steve.

Absolutely right. One of the few things I still remember from SCJP preparation