Public void e

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public void actionPerformed(ActionEvent e) { if(e.getSource()==exitbutton)System.exit(1); DecimalFormat num = new DecimalFormat(",###.##"); double width, length, area; String inString; inString = lengthfield.getText(); if (inString.equals("")) { inString = "0"; lengthfield.setText("0"); } length = Double.parseDouble(inString); inString = widthfield.getText(); if (inString.equals("")) { inString = "0"; widthfield.setText("0"); } width = Double.parseDouble(inString); area = length * width; areafield.setText(num.format(area)); } public void focusGained(FocusEvent e) { if (e.getSource() == lengthfield || e.getSource() == widthfield) { areafield.setText("");
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} else if (e.getSource() == areafield) { areafield.setNextFocusableComponent(calculatebutton); calculatebutton.grabFocus(); } } public void focusLost(FocusEvent e) { if (e.getSource() == widthfield) { widthfield.setNextFocusableComponent(calculatebutton); } } public static void main(String args[]) { new OfficeAreaCalculator(); } }
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/* import javax.swing.*; import java.awt.event.*; import java.awt.Container; import java.awt.*; public class DayGui extends JFrame implements ActionListener { private JFrame mainframe ; private JButton cmdgood ; private JButton cmdbad ; public void actionPerformed(ActionEvent e) { if (e.getSource() == cmdgood ) JOptionPane. showMessageDialog ( null , "Today is a good day!" , "Event Handler Message" , JOptionPane.
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