GRAPHICAL USER INTERFACE (GUI) AND OBJECT-ORIENTED DESIGN (OOD) - Java Programming: From Problem Analysis to Program Design - page 362

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();

}

}
Sample Run: (Figure 6-10 shows the display after the user typed 98.60 in the text
field Temp in Fahrenheit and pressed Enter .)

FIGURE 6-10 Sample run for TempConversion