Creating and Enriching Graphical User Interfaces - Beginning Java 7 - page 601

pnlTemp.add(txtResult);
pnlLayout.add(pnlTemp);
pnlTemp = new Panel();
ActionListener al;
al = new ActionListener()
{

@Override
public void actionPerformed(ActionEvent ae)
{

try
{

double value =

Double.parseDouble(txtDegrees.getText());
double result = (value-32.0)*5.0/9.0;
txtResult.setText("celsius

= "+res-

ult);

}
catch (NumberFormatException nfe)
{

System.err.println("bad input");

}

}

};
Button btnConvertToCelsius = new Button("convert to
celsius");
btnConvertToCelsius.addActionListener(al);
pnlTemp.add(btnConvertToCelsius);
al = new ActionListener()
{

@Override
public void actionPerformed(ActionEvent ae)
{

try
{

double value =

Double.parseDouble(txtDegrees.getText());