Discussion :

[java_programme]

je lance cet applet

Code :

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import javax.swing.JPanel;
import javax.swing.JApplet;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import java.awt.Rectangle;
import java.io.File;
 
import javax.swing.JComboBox;
import javax.swing.JLabel;
 
public class Menu extends JApplet {
 
	/**
         * 
         */
	private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private JMenuBar jJMenuBar = null;
	private JComboBox jComboBox = null;
	private JLabel jLabel = null;
	private JMenu jMenu = null;
	private JMenuItem jMenuItem = null;
	private JLabel jLabel1 = null;
	/**
         * This method initializes jJMenuBar    
         *      
         * @return javax.swing.JMenuBar 
         */
	private JMenuBar getJJMenuBar() {
		if (jJMenuBar == null) {
			jJMenuBar = new JMenuBar();
			jJMenuBar.add(getJMenu());
		}
		return jJMenuBar;
	}
 
	/**
         * This method initializes jComboBox    
         *      
         * @return javax.swing.JComboBox        
         */
	private JComboBox getJComboBox() {
		int i;
		if (jComboBox == null) {
			jComboBox = new JComboBox();
			jComboBox.setBounds(new Rectangle(14, 48, 255, 34));
			jComboBox.setSelectedIndex(-1);
			File f = new File("C://");
			String[]fichier= f.list();
			System.out.println(fichier.length);
			for (i=0;i<=fichier.length-1;i++)jComboBox.insertItemAt(fichier[i],i);
		}
		return jComboBox;
	}
 
	/**
         * This method initializes jMenu        
         *      
         * @return javax.swing.JMenu    
         */
	private JMenu getJMenu() {
		if (jMenu == null) {
			jMenu = new JMenu();
			jMenu.setText("version");
			jMenu.add(getJMenuItem());
		}
		return jMenu;
	}
 
	/**
         * This method initializes jMenuItem    
         *      
         * @return javax.swing.JMenuItem        
         */
	private JMenuItem getJMenuItem() {
		if (jMenuItem == null) {
			jMenuItem = new JMenuItem();
			jMenuItem.setText("version 1.0");
		}
		return jMenuItem;
	}
 
	/**
         * @param args
         */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
 
	}
 
	/**
         * This is the xxx default constructor
         */
	public Menu() {
		super();
	}
 
	/**
         * This method initializes this
         * 
         * @return void
         */
	public void init() {
		this.setSize(300, 200);
		this.setJMenuBar(getJJMenuBar());
		this.setContentPane(getJContentPane());
	}
 
	/**
         * This method initializes jContentPane
         * 
         * @return javax.swing.JPanel
         */
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jLabel1 = new JLabel();
			jLabel1.setBounds(new Rectangle(19, 90, 261, 35));
			jLabel1.setText("                                   hote");
			jLabel = new JLabel();
			jLabel.setBounds(new Rectangle(14, 4, 255, 30));
			jLabel.setText("Fichier sur votre disque dur");
			jContentPane = new JPanel();
			jContentPane.setLayout(null);
			jContentPane.add(getJComboBox(), null);
			jContentPane.add(jLabel, null);
			jContentPane.add(jLabel1, null);
		}
		return jContentPane;
	}
 
}

et j'obtient l'erreur suivante (dans une page html):

charger : classe Menu.java introuvable.
java.lang.ClassNotFoundException: Menu.java
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: (Le chemin d'accès spécifié est introuvable)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at sun.net.http://www.protocol.file.FileURLConn...onnect(Unknown Source)
at sun.net.http://www.protocol.file.FileURLConn...Stream(Unknown Source)
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 10 more
charger : classe Menu introuvable.
java.lang.ClassNotFoundException: Menu
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: (Le fichier spécifié est introuvable)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at sun.net.http://www.protocol.file.FileURLConn...onnect(Unknown Source)
at sun.net.http://www.protocol.file.FileURLConn...Stream(Unknown Source)
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 10 more
charger : classe Menu introuvable.
java.lang.ClassNotFoundException: Menu
at sun.applet.AppletClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.applet.AppletClassLoader.loadCode(Unknown Source)
at sun.applet.AppletPanel.createApplet(Unknown Source)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(Unknown Source)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: (Le fichier spécifié est introuvable)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(Unknown Source)
at java.io.FileInputStream.<init>(Unknown Source)
at sun.net.http://www.protocol.file.FileURLConn...onnect(Unknown Source)
at sun.net.http://www.protocol.file.FileURLConn...Stream(Unknown Source)
at sun.applet.AppletClassLoader.getBytes(Unknown Source)
at sun.applet.AppletClassLoader.access$100(Unknown Source)
at sun.applet.AppletClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 10 more
java.security.AccessControlException: access denied (java.io.FilePermission C:\ read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.File.list(Unknown Source)
at Menu.getJComboBox(Menu.java:51)
at Menu.getJContentPane(Menu.java:126)
at Menu.init(Menu.java:108)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.security.AccessControlException: access denied (java.io.FilePermission C:\ read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.File.list(Unknown Source)
at Menu.getJComboBox(Menu.java:51)
at Menu.getJContentPane(Menu.java:126)
at Menu.init(Menu.java:108)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.security.AccessControlException: access denied (java.io.FilePermission C:\ read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.File.list(Unknown Source)
at Menu.getJComboBox(Menu.java:51)
at Menu.getJContentPane(Menu.java:126)
at Menu.init(Menu.java:108)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Comment faire pour eviter l'erreur!!
merci