if(mol == null && request.getParameter("element") != null && (request.getParameter("element").length() > 0)) {
String elemSymbol = request.getParameter("element");
Atom a = new Atom(elemSymbol);
a.setPoint2d(new Point2d(0.0, 0.0));
mol = new Molecule();
mol.addAtom(a);
makeStructure = false;
}
if (mol == null){
response.setContentType("text/plain");