protected void renumberColumns(){
  Iterator iter=m_names.iterator();
  for (int idx=0; iter.hasNext(); ++idx) {
    String name=(String)iter.next();
    ColumnEntry e=(ColumnEntry)m_entries.get(name);
    e.colnum=idx;
  }
}

protected void renumberColumns ( ) { Iterator iter = m_names . iterator ( ) ; for ( int idx = 0 ; iter . hasNext ( ) ; ++ idx ) { String name = ( String ) iter . next ( ) ; ColumnEntry e = ( ColumnEntry ) m_entries . get ( name ) ; e . colnum = idx ; } }
internal method that re - numbers columns upon column removal .
