Temperature Conversion - Java GUI

/********************************************************************
/ Name: Brian Butler
/ Professor: Gary Hartell
/ Date: 3-28-2011
/ 										Descripion: 
/					This program is used to convert the temperature
/					from Celsius to Fahrenheit and vice versa.
/
/			Note:  Type in a value and press enter
/********************************************************************/
import java.awt.*;			
import java.awt.event.*;	
import javax.swing.*;	

public class TempConversion extends JFrame
{
	private JLabel celsiusLabel;		
	private JLabel fahrenheitLabel;
	
	private JTextField celsiusTF;		
	private JTextField fahrenheitTF;	
	
	private CelsHandler celsiusHandler;
	private FahrHandler fahrenheitHandler;
	
	private static final int WIDTH = 500;
	private static final int HEIGHT = 75;	
	private static final double FTOC = 5.0/9.0;
	private static final double CTOF = 9.0/5.0;
	private static final int OFFSET = 32;
	
	public TempConversion()
	{
		setTitle("Temperature Conversion");
		Container c = getContentPane();
		c.setLayout(new GridLayout(1,4));
		
		celsiusLabel = new JLabel("Temp in Celsius: ",
											SwingConstants.RIGHT);
		fahrenheitLabel = new JLabel("Temp in Fahrenheit: ",
											SwingConstants.RIGHT);
											
		celsiusTF = new JTextField(7);
		fahrenheitTF = new JTextField(7);
		
		c.add(celsiusLabel);
		c.add(celsiusTF);
		c.add(fahrenheitLabel);
		c.add(fahrenheitTF);
		
		celsiusHandler = new CelsHandler();
		fahrenheitHandler = new FahrHandler();
		
		celsiusTF.addActionListener(celsiusHandler);
		fahrenheitTF.addActionListener(fahrenheitHandler);
		
		setSize (WIDTH, HEIGHT);
		setVisible(true);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}
	
	private class CelsHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			double celsius, fahrenheit;
			
			celsius =
					Double.parseDouble(celsiusTF.getText());
			fahrenheit = celsius * CTOF + OFFSET;
			fahrenheitTF.setText(String.format("%.2f", fahrenheit));
		}
	}
	
	private class FahrHandler implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			double celsius, fahrenheit;
			fahrenheit = 
					Double.parseDouble(fahrenheitTF.getText());
			celsius = (fahrenheit - OFFSET) * FTOC;
			celsiusTF.setText(String.format("%.2f", celsius));
		}
	}
			
	
	public static void main(String[] args)
	{
		TempConversion tempConv = new TempConversion();
		tempConv.setLocationRelativeTo(null);
	}
}


//END OF CODE