incomparable types: int and <nulltype>

[vakon]

class Search
{
    public static void main (String[] args)
    {
        int position;
        int counter = 0;    
        String para;    
 
        para = Keyin.inString("insert a paragraph");    
 
        do {    
        position = para.indexOf(' ');
        para = para.substring ( position + 1, para.length () -1); 
        counter = counter + 1;
        } while ( position != null ) ;
 
        counter = counter + 1 ;
        System.out.println(counter);
            }
        }
 

aw well the debug says :

incomparable types: int and <nulltype>
} while ( position != null ) ;
^

HEHE any suggestions :P

[pbmods]

Heya, vakon. Welcome to TSDN!

Changed thread title to better describe the problem (did you know that threads whose titles do not follow the Posting Guidelines actually get FEWER responses?).

Please use CODE tags when posting source code:

[CODE=java]
Java code goes here.
[/CODE]

[r035198x]

class Search
{
    public static void main (String[] args)
    {
        int position;
        int counter = 0;    
        String para;    
 
        para = Keyin.inString("insert a paragraph");    
 
        do {    
        position = para.indexOf(' ');
        para = para.substring ( position + 1, para.length () -1); 
        counter = counter + 1;
        } while ( position != null ) ;
 
        counter = counter + 1 ;
        System.out.println(counter);
            }
        }
 

aw well the debug says :

incomparable types: int and <nulltype>
} while ( position != null ) ;
^

HEHE any suggestions :P

As the error message says, you cannot compare an int (primitive) with null (reference type).
Perhaps you want to compare position with zero?

[arrowman]

Hi,
Change primitive type "int" to reference type "Integer".