DELETING ROW

Hi all.
   I'm traying to delete a row of a table. Te code is:
String query = "DELETE FROM " + ID_REQUEST_TABLE + " WHERE id = '" +
numReq+ "';";int result = s.executeUpdate(query);System.out.println("result: " + result);if(result != 0) {    .....
connection.commit();}
 

   If file do not exists "result" should be "0" (JDBC API), if exists,
it should be the number of the row that delete. But I always get the
value "1", always, even if the row to delete is 5,6, ... 10.
   I'm using postgresql 7.02 with linux RedHat 6.0 and jdk1.2
   Cheers, Gabi.