Code:
package tempconv;

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


public class TempConv extends JFrame
{

private JLabel CelL, FahrL;
private JTextField CelTF, FahrTF;
private CelsiusHandler cHandler;
private FahrenheitHandler fHandler;
        
private static final double FTOC = 5.0 / 9.0;
private static final
...