import  java.io.*;
 import  org.apache.poi.hssf.usermodel.HSSFWorkbook;

 public   class  JavaExcel {
     public   static   void  main(String[] args) {
         try  {
            HSSFWorkbook wb =  new  HSSFWorkbook();
            // А если так сделать?
            HSSFSheet sheet = workbook.getSheetAt( [b]0 );[/b]
            FileOutputStream fileOut =  new  FileOutputStream("c:/workbook.xls");
            wb.write(fileOut);
            fileOut.close();

        }  catch  (IOException e) {
        }

    }
}