@Override public void windowClosing(java.awt.event.WindowEvent e){
  setVisible(false);
}

@ Override public void windowClosing ( java . awt . event . WindowEvent e ) { setVisible ( false ) ; }
handle close of editor window . < p > overload / override method in jmrijframe parent , which by default is permanently closing the window . here , we just want to make it invisible , so we don ' t dispose it ( yet ) .
