Java jApplet Error Invocation Exception

[PEASANT KING]

Hallo Leute,

ich habe mir ein kleines Applet geschrieben allerdings weist es Fehler auf, zumindest wenn ich es im Browser starte hier mal der Code:

import java.awt.event.ActionEvent;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.net.Socket;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * GFMChatApplet.java
 *
 * Created on 07.07.2011, 09:20:41
 */
/**
 *
 * @author *****
 */
public class GFMChatApplet extends javax.swing.JApplet implements Runnable {
    
    private static final long serialVersionUID = 1L;
    public static final int PORT = 8765;
    Socket socket;
    DataInputStream in;
    PrintStream out;
    Thread thread;

    /** Initializes the applet GFMChatApplet */
    public void init() {
        try {
            java.awt.EventQueue.invokeAndWait(new Runnable() {

                public void run() {
                    initComponents();
                }
            });
        } 
        catch (Exception ex) {
            ex.printStackTrace();
            System.err.println("createGUI didn't successfully complete");
        }
    }

    /** This method is called from within the init() method to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

        sendButton = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        outputField = new javax.swing.JTextArea();
        inputField = new javax.swing.JTextField();

        sendButton.setText("Senden");

        outputField.setColumns(20);
        outputField.setEditable(false);
        outputField.setRows(5);
        jScrollPane1.setViewportView(outputField);

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.Alignment.LEADING, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(inputField, javax.swing.GroupLayout.DEFAULT_SIZE, 305, Short.MAX_VALUE)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                        .addComponent(sendButton)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 249, Short.MAX_VALUE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(sendButton)
                    .addComponent(inputField, javax.swing.GroupLayout.PREFERRED_SIZE, 23, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap())
        );
    }// </editor-fold>
    // Variables declaration - do not modify
    private javax.swing.JTextField inputField;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTextArea outputField;
    private javax.swing.JButton sendButton;
    // End of variables declaration

    @Override
    public void start() {
        try {
            socket = new Socket(this.getCodeBase().getHost(), PORT);
            in = new DataInputStream(socket.getInputStream());
            out = new PrintStream(socket.getOutputStream());
        } 
        catch (IOException e) {
            this.showStatus(e.toString());
            say("Verbindung zum Server fehlgeschlagen!");
        }
        say("Verbindung zum Server aufgenommen..."); //Bemerkung java-forum.org: Sollte besser am Ende des try-Blockes stehen

        if (thread == null) {
            thread = new Thread(this);
            thread.setPriority(Thread.MIN_PRIORITY);
            thread.start();
        }
    }
    
    @Override
    public void run() {
        
        String line;

            try
            {
                while(true) {
                    line = in.readLine();
                    if(line!=null) {
                        outputField.append(line+'\n' );
                    }
                }
            } 
            catch (IOException e) { 
                say("Verbindung zum Server abgebrochen"); 
            }
    }
    
    public boolean actionPerformed(ActionEvent e) {
        
        if (e.getSource() == inputField) {
            String inp= e.paramString();
            out.println(inp);
            inputField.setText("");
            return true;
        }
        return false;
    }
    
    
    public void say(String msg) {
        outputField.append("*** "+msg+" ***\n");
    }
}

Beim Aufruf im Browser bekomme ich die Meldung:

java.lang.reflect.InvocationTargetException
    at com.sun.deploy.util.DeployAWTUtil.invokeAndWait(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.runOnEDT(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager.createApplet(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.security.AccessControlException: access denied (java.lang.RuntimePermission exitVM.0)
    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.checkExit(Unknown Source)
    at javax.swing.JFrame.setDefaultCloseOperation(Unknown Source)
    at GFMChatView.initComponents(GFMChatView.java:38)
    at GFMChatView.<init>(GFMChatView.java:20)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at java.lang.Class.newInstance0(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at sun.plugin2.applet.Plugin2Manager$12.run(Unknown Source)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$000(Unknown Source)
    at java.awt.EventQueue$1.run(Unknown Source)
    at java.awt.EventQueue$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)
Ausnahme: java.lang.reflect.InvocationTargetException

Allerdings verstehe ich nicht so ganz weshalb...

Grüße DJ

 

[crykiller]

HI,

hast du dein Applet signiert? Denn für mich sieht das nach einem Berechtigungsfehler aus.

java.lang.reflect.InvocationTargetException : sagt nur aus, dass die aufgerufene Methode eine
Exception geworfen hat. Diese wird gekapselt und weitergeleitet..

Deine eigentliche Exception ist das hier:

Caused by: java.security.AccessControlException: access denied

Guck dir doch mal das hier an:

Applets signieren

Gruß crykiller

 

[Tumbleweed]

javax.swing.JFrame.setDefaultCloseOperation(Unknown Source)

Rufst du das irgendwo auf? Wenn ja, kommentier das mal aus!

 

[PEASANT KING]

Wunderbar hab es segniert und es funktioniert, danke für den Hinweis.