The operator is undefined
37,287
Solution 1
Primitive types in Java cannot be null
. If you want to check for 0, do a != 0
.
Solution 2
Put a
into an Integer
object, which can be compared to null
:
Integer value = new Integer(a);
while (value != null)
{
// Do stuff
}
Author by
Syntic
Updated on July 05, 2022Comments
-
Syntic almost 2 years
I just tried to make a simple class that lets me figure out the length of a file:
public class Size { long s = 0; int a; public static void main(String[]args){ new Size(); } Size(){ try{ FileInputStream str = new FileInputStream("E:/Eclipse/Resources/smile.jpg"); while(a != null){ s++; } }catch (IOException e){ e.printStackTrace(); } } }
I run into a problem with
while(a != null)
I get the Error:
The operator != is undefined for the argument type(s) int, null
Any ideas why it's blocking the condition?