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check for negative integer

jaggernat
jaggernat asked
on
5,570 Views
Last Modified: 2008-02-20
hi guys
i think this is easy..

I have a field where users can enter a number, but the number must be a positive integer
like 10, 20 ect . i want to check if the number is negative  
something like

if(the integer is negative or starts with a minus '-' sign)

{
System.out.println("Please enter positive integer only"); //display this in console
}

any ideas how i can do that in java

thanks
J
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