//N.Kennedy 7/01/02
//Centigrade to Fahrenheit Converter
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
class Converter implements ActionListener {
JFrame frame = new JFrame("Temperature Converter");
JTextField numberWindow = new JTextField(4); // set up global window
public Converter() {
frame.getContentPane().setLayout(new GridLayout(2,1));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//frame.pack(); // an automatic setSize
frame.setSize(600,200);
//top panel additions
JPanel topPanel = new JPanel();
frame.getContentPane().add(topPanel);
//and now do the image and title
//and set up image
ImageIcon icon = new ImageIcon("duke.gif");
// and a label to put it in ...
// string, icon and position. string can contain HTML
JLabel imageLabel = new JLabel(
"<html><font color =red size =6 >Temperature Converter V1.0</font>"+
"<p><font color=black size =3 >Nairn Kennedy 2002</font></html>",
icon,JLabel.RIGHT); // set up image on label
topPanel.add(imageLabel);
JPanel bottomPanel = new JPanel();
frame.getContentPane().add(bottomPanel);
//bottom panel created
bottomPanel.setLayout(new GridLayout(1,3));
bottomPanel.add(numberWindow);//defined globally
ImageIcon fish = new ImageIcon("fishy01.gif");
JButton centButton = new JButton("To Centigrade",fish);
ImageIcon duck = new ImageIcon("duck01.gif");
JButton fahrButton = new JButton("To Fahrenheit",duck);
centButton.addActionListener(this);//set up listener. this is this object
fahrButton.addActionListener(this);// another listener
bottomPanel.add(fahrButton);
bottomPanel.add(centButton);
frame.setVisible(true);
}// end constructor
public void actionPerformed (ActionEvent e) {
// pick up button presses
//which was pushed?
if(e.getActionCommand() == "To Centigrade") {
//do centigrade conversion
centConvert();
}//end if
if(e.getActionCommand() == "To Fahrenheit") {
fahrConvert();
}//end if
}//end ActionPerformed
private void centConvert() {
//Convert to Centigrade
//get the figure from window, convert and replace
double fahr = Double.parseDouble(numberWindow.getText());
//convert ...
double cent = (fahr - 32.0)*5.0/9.0;
//and display
//set up string in proper decimal format first
DecimalFormat decF = new DecimalFormat("000.0");
numberWindow.setText(decF.format(cent));
}
private void fahrConvert() {
//convert to Fahrenheit
//as above, get figure
double cent = Double.parseDouble(numberWindow.getText());
//convert ...
double fahr = cent*9.0/5.0 +32.0; //and display as above
DecimalFormat decF = new DecimalFormat("000.0");
numberWindow.setText(decF.format(fahr));
}
}//end Converter
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