Sorry again. Here is the code I use:

byte[] imageBytes = null;

Blob blob = rs.getBlob(16);

if (!rs.wasNull())
{
// blob.getBytes and not rs.getBytes :)
imageBytes = blob.getBytes(1, (int)blob.length());
}

I think I also had some problems with reading blobs (it was long time
ago and i can't remember what was the problem) and then I found this
solution.

Bye,
damir