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