public void addLPButtonActionPerformed(ActionEvent evt) { Point point = parent.getLocation(); ListeningPointDialog lpd = new ListeningPointDialog(parent, point); if (lpd.transportTextField.getText() == null || lpd.transportTextField.getText().trim().equals("")) return; else { if (lpd.portTextField.getText() == null || lpd.portTextField.getText().trim().equals("")) return; } listeningPointsList.addListeningPoint( lpd.portTextField.getText(), lpd.transportTextField.getText()); }