Java (გაღრმავებული) - საგამოცდო N1

final JTextField[] fields = new JTextField[3];
for (int i = 0; i < fields.length; i++) {
    fields[i] = new JTextField("" + i);
    fields[i].setVisible(Boolean.TRUE);
}

JButton button = new JButton("Sum");
button.addActionListener(new ActionListener() {

    @Override
    public void actionPerformed(ActionEvent e) {
        try {
            Integer a = Integer.parseInt(fields[0].getText());
            Integer b = Integer.parseInt(fields[1].getText());
            Integer c = a + b;
            fields[2].setText(c.toString());
        } catch (Exception ex) {
            fields[2].setText("Error");
        }
    }
});