<div>Ma con il click sui pulsanti lo sfondo cambia colore?</div> <div> </div> <div>Alessio </div> <div class="gmail_quote">2009/10/14 Livio Metton <<a href="mailto:livio.metton@insiel.it">livio.metton@insiel.it</a>> <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Ho copiato il codice, compilato ed eseguito. Tutto O.K. Ubuntu Jaunty 64 bit Linux 2.6.28-15-generic #52-Ubuntu SMP Wed Sep 9 10:48:52 UTC 2009 x86_64 GNU/Linux java version "1.6.0_16" Java(TM) SE Runtime Environment (build 1.6.0_16-b01) Java HotSpot(TM) 64-Bit Server VM (build 14.2-b01, mixed mode) Livio Il giorno mer, 14/10/2009 alle 09.21 +0200, alessio rainieri ha scritto: <div> <div></div> <div class="h5">> Questo semplice programma non mi funziona ( ho provato su due PC con > ubuntu jaunty 9.04 ), su Windows invece si. > > import java.awt.*; > import java.awt.event.*; > import javax.swing.*; > import java.awt.peer.*; > > public class ButtonTest { > > public static void main (String[] args){ > > ButtonFrame frame = new ButtonFrame(); > frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); > frame.setVisible(true); > } > > } > > class ButtonFrame extends JFrame { > > /** > * > */ > private static final long serialVersionUID = 1L; > public ButtonFrame(){ > > setTitle("Button Test"); > setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT); > > Container contentPane = getContentPane(); > ButtonPanel panel = new ButtonPanel(); > contentPane.add(panel); > } > > public static final int DEFAULT_WIDTH=300; > public static final int DEFAULT_HEIGHT=200; > } > > class ButtonPanel extends JPanel > { > > /** > * > */ > private static final long serialVersionUID = 1L; > JButton yellowButton = new JButton("Yellowq"); > JButton redButton = new JButton("Red"); > JButton greenButton = new JButton("Green"); > > public ButtonPanel() { > > add(yellowButton); > add(redButton); > add(greenButton); > > yellowButton.addActionListener(new ActionListener(){ > public void actionPerformed(ActionEvent event){ > setBackground(Color.YELLOW); > } > }); > > redButton.addActionListener(new ActionListener(){ > public void actionPerformed(ActionEvent event){ > setBackground(Color.RED); > } > }); > > greenButton.addActionListener(new ActionListener(){ > public void actionPerformed(ActionEvent event){ > setBackground(Color.GREEN); > } > }); > > } > > } </div></div>-- ubuntu-it mailing list <a href="mailto:ubuntu-it@lists.ubuntu.com">ubuntu-it@lists.ubuntu.com</a> Opzioni d'iscrizione - <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-it" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-it</a> <a href="http://wiki.ubuntu-it.org/Listiquette" target="_blank">http://wiki.ubuntu-it.org/Listiquette</a> </blockquote></div>