Where is the Multi-Byte Character.

Question

Hello All
While reading data from DB, our middileware interface gave following error.
java.sql.SQLException: Fail to convert between UTF8 and UCS2: failUTF8Conv
I understand that this failure is because of a multi-byte character, where 10g driver will fix this bug.
I suggested the integration admin team to replace current 9i driver with 10g one and they are on it.
In addition to this, I wanted to suggest to the data input team on where exactly is the failure occured.
I have asked them and got the download of the dat file and my intention was to findout where exactly is
that multi-byte character located which caused this failure.
I wrote the following code to check this.
import java.io.*;
public class X
public static void main(String ar[])
int linenumber=1,columnnumber=1;
long totalcharacters=0;
try
File file = new File("inputfile.dat");
FileInputStream fin = new FileInputStream(file);
byte fileContent[] = new byte[(int)file.length()];
fin.read(fileContent);
for(int i=0;i<fileContent.length;i++)
   columnnumber++;totalcharacters++;
   if(fileContent<0 && fileContent[i]!=10 && fileContent[i]!=13 && fileContent[i]>300) // if invalid
{System.out.println("failure at position: "+i);break;}
if(fileContent[i]==10 || fileContent[i]==13) // if new line
{linenumber++;columnnumber=1;}
fin.close();
System.out.println("Finished successfully, total lines : "+linenumber+" total file size : "+totalcharacters);
catch (Exception e)
e.printStackTrace();
System.out.println("Exception at Line: "+linenumber+" columnnumber: " +columnnumber);
}But this shows that the file is good and no issue with this.
Where as the middleware interface fails with above exception while reading exactly the same input file.
Anywhere I am doing wrong to locate that multi-byte character ?
Greatly appreciate any help everyone !
Thanks.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

Answer 1

My challenge is to spot the multi-byte character hidden in this big dat file.
This is because the data entry team asked me to spot out the record and column that has issue out of
lakhs of records they sent inside this file.
Lets have the validation code like this...
   if( (fileContent<0 && fileContent[i]!=10 && fileContent[i]!=13) || fileContent[i]>300) // if invalid
{System.out.println("failure at position: "+i);break;}lessthan 0 - I saw some -ve values when I was testing with other files.
greaterthan 300 - was a try to find out if any characters exceeds actual chars. range.
if 10 and 13 are for line-feed.
with this, I randomly placed chinese, korean characters and program found them.
any alternative (better code ofcourse) way to catch this black sheep ?
Edited by: Sanath_K on Oct 23, 2009 8:06 PM