public void actionPerformed(ActionEvent e) {
if (listBefore.getSelectedValue() != null) {
VideoTechnik v = (VideoTechnik) listBefore.getSelectedValue();
String str = JOptionPane.showInputDialog(panel5, "Количество: ");
try {
JOptionPane.showMessageDialog(
panel5, "Сумма: " + String.valueOf(v.toRachet(Integer.parseInt(str))));
} catch (NumberFormatException a) {
} catch (NullPointerException aa) {
}
} else
JOptionPane.showMessageDialog(panel5, "Не выбрана VideoTechnik!!!\nPlease, try again.");
}
