Signed applet crashes

Question

Hello all!
Has ever happened to someone that when using a signed applet, the browser crashes without giving an error or something?
I made an applet that had to read a file on the server, then signed it, and when trying it, after the browser asked me if to trust the signature, all freezed and nothing else happened...
I am developing an applet with NetBeans, the code in question is this:
import java.io.*;*
*import java.util.*;
public class PhotoAlbum extends javax.swing.JApplet {
    /** Initializes the applet PhotoAlbum */
    public void init()
        try
            java.awt.EventQueue.invokeAndWait(new Runnable() {
                public void run() {
                    initComponents();
        } catch (Exception ex)
            ex.printStackTrace();
    public void start()
        try
            initAlbum();
        catch (Exception e)
            error.setText(e.getLocalizedMessage()); //"error" is a textbox. I use that to write the exceptions caught runtime.
    private void initAlbum() throws Exception
      FileReader reader = new FileReader("/Foto/PhotoDB");
@SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        modLista = new javax.swing.DefaultListModel();
        jScrollPane1 = new javax.swing.JScrollPane();
        listaAlbum = new javax.swing.JList();
        jScrollPane2 = new javax.swing.JScrollPane();
        error = new javax.swing.JTextArea();
        jLabel1 = new javax.swing.JLabel();
        listaAlbum.setModel(modLista);
        listaAlbum.setVisibleRowCount(4);
        jScrollPane1.setViewportView(listaAlbum);
        error.setColumns(20);
        error.setRows(5);
        jScrollPane2.setViewportView(error);
        jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/Foto/bell_urlo.png"))); // NOI18N
        jLabel1.setText("jLabel1");
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 547, Short.MAX_VALUE)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 523, Short.MAX_VALUE)
                .addContainerGap())
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap(117, Short.MAX_VALUE)
                .addComponent(jLabel1)
                .addGap(72, 72, 72))
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel1)
                .addGap(12, 12, 12)
                .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 218, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 39, Short.MAX_VALUE)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
    }// </editor-fold>
    // Variables declaration - do not modify
    private javax.swing.JTextArea error;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JList listaAlbum;
    private javax.swing.DefaultListModel modLista;
    // End of variables declaration
    public Album[] collection;
    public Album current;
    public int photoIndex;
}This is the basic code, I deleted all the instructions, leaving the one from where the error started (the filereader declaration)
I don't have any idea on why the browser crashes...
When the applet is unsigned, on the textbox is shown correctly the error "permission denied".
On other files the signing procedure goes ok, since I tried it on a program I found on the internet @ http://www.captain.at/programming/java/
Edited by: DrZoidberg on Sep 15, 2008 9:15 AM

Answer 1

are you using IE?
i use mozilla and this is what i see when i trust the certificate.
java.lang.SecurityException: class "PhotoAlbum$1"'s signer information does not match signer information of other classes in the same package
at java.lang.ClassLoader.checkCerts(Unknown Source)
at java.lang.ClassLoader.preDefineClass(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
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 java.lang.ClassLoader.loadClassInternal(Unknown Source)
at PhotoAlbum.init(PhotoAlbum.java:21)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
at PhotoAlbum.start(PhotoAlbum.java:40)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
might help you :)