Anyone got code for a celsius/fahrenheit converter or know why I can get it

Question

Greetings,
I'm looking for a celsius/fahrenheit converter as a applet or application. I know there are billions out there so if someone has or (or feels like building it) I would be very greatful...
Thanks

Answer 1

// A very simple Celcius <--> Fahrenheit Converter
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class Converter extends JFrame {
    private BListener b = new BListener();
    private Container contentPane;
    private JTextField enterNumber;
    private JPanel mainPanel;
    private JButton FtoC, CtoF;
    private double celsius=0.0, fahrenheit=0.0;
    public static void main(String[] args) {
     Converter c =
         new Converter("Converter");
    public Converter(String title) {
     super(title);
     // set size of window
     setSize(600, 100);
     // Make window closable
     MakeClosable();
     mainPanel = new JPanel();
     mainPanel.setPreferredSize(new Dimension(600,100));
     enterNumber = new JTextField("0.0", 10);
     FtoC = new JButton("To Celsius");
     CtoF = new JButton("To Fahrenheit");
     FtoC.addActionListener(b);
     CtoF.addActionListener(b);
     contentPane = getContentPane();
     contentPane.add(mainPanel);
     mainPanel.add(enterNumber);
     mainPanel.add(FtoC);
     mainPanel.add(CtoF);
     setVisible( true );
    public void MakeClosable() {
     addWindowListener( new WindowAdapter () {
          public void windowClosing(WindowEvent e) {
              System.exit(0);
    class BListener implements ActionListener {
     public void actionPerformed(ActionEvent e) {
         // which button was pushed
         String which = e.getActionCommand();
         if(which.equals("To Celsius")){
          GetCelsius();
         if(which.equals("To Fahrenheit")){
          GetFahrenheit();
    public void GetCelsius() {
     String F = enterNumber.getText();
     if(!(F.equals(""))){
         try{
          fahrenheit = Double.parseDouble(F);
          celsius = (5.0/9.0)*(fahrenheit-32);
          enterNumber.setText(" " + celsius);
         catch(NumberFormatException e){
          JOptionPane.showMessageDialog(null,
                               "Please enter a number first",
                               "No number",
                               JOptionPane.ERROR_MESSAGE);
    public void GetFahrenheit() {
     String C = enterNumber.getText();
     if(!(C.equals(""))){
         try{
          celsius = Double.parseDouble(C);
          fahrenheit = ((9.0/5.0)*celsius)+32;
          enterNumber.setText(" " + fahrenheit);
         catch(NumberFormatException e){
          JOptionPane.showMessageDialog(null,
                               "Please enter a number first",
                               "No number",
                               JOptionPane.ERROR_MESSAGE);
} // end of Converter class