Mega Code Archive
CelsiusConverter
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/* From http://java.sun.com/docs/books/tutorial/index.html */
/*
* Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
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* -Redistribution of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
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* -Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
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* Neither the name of Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
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*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
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// v 1.3
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.UIManager;
// This example demonstrates the use of JButton, JTextField and JLabel.
public class CelsiusConverter implements ActionListener {
JFrame converterFrame;
JPanel converterPanel;
JTextField tempCelsius;
JLabel celsiusLabel, fahrenheitLabel;
JButton convertTemp;
// Constructor
public CelsiusConverter() {
// Create the frame and container.
converterFrame = new JFrame("Convert Celsius to Fahrenheit");
converterPanel = new JPanel();
converterPanel.setLayout(new GridLayout(2, 2));
// Add the widgets.
addWidgets();
// Add the panel to the frame.
converterFrame.getContentPane()
.add(converterPanel, BorderLayout.CENTER);
// Exit when the window is closed.
converterFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Show the converter.
converterFrame.pack();
converterFrame.setVisible(true);
}
// Create and add the widgets for converter.
private void addWidgets() {
// Create widgets.
tempCelsius = new JTextField(2);
celsiusLabel = new JLabel("Celsius", SwingConstants.LEFT);
convertTemp = new JButton("Convert...");
fahrenheitLabel = new JLabel("Fahrenheit", SwingConstants.LEFT);
// Listen to events from Convert button.
convertTemp.addActionListener(this);
// Add widgets to container.
converterPanel.add(tempCelsius);
converterPanel.add(celsiusLabel);
converterPanel.add(convertTemp);
converterPanel.add(fahrenheitLabel);
celsiusLabel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
fahrenheitLabel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
}
// Implementation of ActionListener interface.
public void actionPerformed(ActionEvent event) {
// Parse degrees Celsius as a double and convert to Fahrenheit.
int tempFahr = (int) ((Double.parseDouble(tempCelsius.getText())) * 1.8 + 32);
fahrenheitLabel.setText(tempFahr + " Fahrenheit");
}
// main method
public static void main(String[] args) {
// Set the look and feel.
try {
UIManager.setLookAndFeel(UIManager
.getCrossPlatformLookAndFeelClassName());
} catch (Exception e) {
}
CelsiusConverter converter = new CelsiusConverter();
}
}
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