// SwingGui Example
// Source code file MyForm.java
// This GUI converts a Celsius
// temperature to Fahrenheit

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class MyForm {
    private JTextField txtCelsius;
    private JPanel panel1;
    private JTextField txtFahrenheit;
    private JButton btnConvert;

    public MyForm() {
        btnConvert.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int cel = Integer.parseInt(txtCelsius.getText( ));
                int fahr = 9 * cel / 5 + 32;
                String output = String.valueOf(fahr);
                JOptionPane.showMessageDialog(
                   null,
                   "Fahrenheit Temperature: " + output);
                txtFahrenheit.setText(output);
            }
        });
    }

    public static void main(String[ ] args) {
        JFrame frame = new JFrame("Cel2Fahr Example");
        MyForm form = new MyForm( );
        frame.setContentPane(form.panel1);
        //frame.pack( );
        frame.setSize(400, 400);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}