IndexOutOfBoundsException when trying to read MS Excel file using Apache POI-HSSF

Question

Whilst trying to parse MS Excel file using POI-HSSF v3.2 I am getting IndexOutOfBoundsException. The spreadsheet I am trying to read isn't empty it has been created using MS Excel 2003 and BiffViewer included with the POI package has no problem parsing it.

My code is as follows:

package src;

import java.io.*;
import org.apache.poi.hssf.record.*;
import org.apache.poi.hssf.eventusermodel.*;

class Excel implements HSSFListener
{
    public static void main (String[] args) throws Exception
    {
     FileInputStream stream = new FileInputStream("c:\\temp\\a.xls");


     HSSFEventFactory f = new HSSFEventFactory();

     HSSFRequest req = new HSSFRequest();

     req.addListenerForAllRecords(new Excel());

     f.processEvents(req,stream);

     stream.close();
    }

    public void processRecord (Record r)
    {
     System.out.println(r);
    }
}

And here is the stack trace I am getting:

_{Exception in thread "main" java.lang.IndexOutOfBoundsException at java.io.FileInputStream.readBytes(Native Method) at java.io.FileInputStream.read(FileInputStream.java:199) at org.apache.poi.hssf.record.RecordInputStream.nextRecord(RecordInputStream.java:106) at org.apache.poi.hssf.eventusermodel.HSSFRecordStream.getNextRecord(HSSFRecordStream.java:128) at org.apache.poi.hssf.eventusermodel.HSSFRecordStream.nextRecord(HSSFRecordStream.java:93) at org.apache.poi.hssf.eventusermodel.HSSFEventFactory.genericProcessEvents(HSSFEventFactory.java:141) at org.apache.poi.hssf.eventusermodel.HSSFEventFactory.processEvents(HSSFEventFactory.java:98) at src.Excel.main(Excel.java:21)}

Many thanks! I know, I am being plain lazy and could have looked at the POI source myself, but, hopefully, someone here will be able to point out swiftly whatever silly thing I've done within my code.

Answer 1

Mystery solved, the correct way of getting an input stream is as follows

FileInputStream file   = new FileInputStream("c:\\temp\\a.xls");
POIFSFileSystem poifs  = new POIFSFileSystem(file);
InputStream     stream = poifs.createDocumentInputStream("Workbook");