Please help -- Why the applet doesn't run with jre1.4.1_01?
Hi,
I have an applet embedded in a remote-server page. It can be loading from the server and running in the local computer with Jre1.3.1. After I uninstalled jre1.3.1 and installed JRE1.4.1_01. My applet doesn't run. Here is the message from Java Consol:
java.lang.NullPointerException
at sun.plugin.cache.CachedFileLoader.writeHeaders(Unknown Source)
at sun.plugin.cache.CachedFileLoader.createCacheFiles(Unknown Source)
at sun.plugin.cache.CachedFileLoader.access$200(Unknown Source)
at sun.plugin.cache.CachedFileLoader$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.cache.Cache.privileged(Unknown Source)
at sun.plugin.cache.CachedFileLoader.download(Unknown Source)
at sun.plugin.cache.CachedFileLoader.load(Unknown Source)
at sun.plugin.cache.FileCache.get(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.connectWithCache(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:1197)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:247)
at sun.applet.AppletClassLoader.getBytes(AppletClassLoader.java:250)
at sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:42)
at sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:143)
at java.security.AccessController.doPrivileged(Native Method)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:140)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:114)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:501)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:566)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:495)
at sun.applet.AppletPanel.run(AppletPanel.java:292)
at java.lang.Thread.run(Thread.java:536)
I copy the my html file which has this applet built-in to my local computer. The webpage can be openned and the applet running fine even with jre1.4.1. Why it didn't run with Jre1.4.1 and it did run with jre 1.3.1 when loading remotely? Could someone tell me what the above messages mean? Is this a bug from Jre1.4.1_01?
I have running server at 206.29.25.29. and select "read sensor". Jre1.4.1_01 will not let the applet run, but jre1.3.1 does.
Is there any body know about this issue?
Thanks,
Kunlun
In fact, I have run many tests and the only failures are when the plugin is 1.4.2 and the app server is on Unix:
Build Deploy Build JDK PlugIn JDK App Server JDK Result
Win Win 1.4.2_02 1.4.2 1.4.2 Success
Win Win 1.4.2 1.4.2 1.4.2 Success
Win Win 1.4.1_02 1.4.2 1.4.2 Success
Win Win 1.4.2 1.4.0 1.4.2 Success
Win Win 1.4.2 1.4.1 1.4.2 Success
Win Win 1.4.2 1.4.2 1.4.2 Success
Unix Win 1.4.2 1.4.2 1.4.2 Success
Unix Win 1.4.2 1.4.2 1.4.1_02 Success
Unix Win 1.4.2 1.4.2 1.4.0 Success
Unix Unix 1.4.2 1.4.0 1.4.0 Success
Unix Unix 1.4.2 1.4.1 1.4.0 Success
Unix Unix 1.4.2 1.4.2 1.4.0 Failure
Win Unix 1.4.2 1.4.0 1.4.0 Success
Win Unix 1.4.2 1.4.1 1.4.0 Success
Win Unix 1.4.2 1.4.2 1.4.0 Failure
Similar Messages
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Applet doesn't work with JRE1.4.1_01
Hi,
I have an applet embedded in a remote-server page. It can be loading from the server and running in the local computer with Jre1.3.1. After I uninstalled jre1.3.1 and installed JRE1.4.1_01. My applet doesn't run. Here is the message from Java Consol:
java.lang.NullPointerException
at sun.plugin.cache.CachedFileLoader.writeHeaders(Unknown Source)
at sun.plugin.cache.CachedFileLoader.createCacheFiles(Unknown Source)
at sun.plugin.cache.CachedFileLoader.access$200(Unknown Source)
at sun.plugin.cache.CachedFileLoader$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.cache.Cache.privileged(Unknown Source)
at sun.plugin.cache.CachedFileLoader.download(Unknown Source)
at sun.plugin.cache.CachedFileLoader.load(Unknown Source)
at sun.plugin.cache.FileCache.get(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.connectWithCache(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.plugin.net.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(HttpURLConnection.java:1197)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:247)
at sun.applet.AppletClassLoader.getBytes(AppletClassLoader.java:250)
at sun.applet.AppletClassLoader.access$100(AppletClassLoader.java:42)
at sun.applet.AppletClassLoader$1.run(AppletClassLoader.java:143)
at java.security.AccessController.doPrivileged(Native Method)
at sun.applet.AppletClassLoader.findClass(AppletClassLoader.java:140)
at sun.plugin.security.PluginClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
at sun.applet.AppletClassLoader.loadClass(AppletClassLoader.java:114)
at java.lang.ClassLoader.loadClass(ClassLoader.java:255)
at sun.applet.AppletClassLoader.loadCode(AppletClassLoader.java:501)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:566)
at sun.plugin.AppletViewer.createApplet(Unknown Source)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:495)
at sun.applet.AppletPanel.run(AppletPanel.java:292)
at java.lang.Thread.run(Thread.java:536)
I copy the my html file which has this applet built-in to my local computer. The webpage can be openned and the applet running fine even with jre1.4.1. Why it didn't run with Jre1.4.1 and it did run with jre 1.3.1 when loading remotely? Could someone tell me what the above messages mean? Is this a bug from Jre1.4.1_01?
Thanks,
KunlunHello
i am facing the same problem. when i run my java applet using localhost.. it does not work and shows the same exceptions
i download the JRE 1.4.1 by using following link
http://java.sun.com/products/plugin/1.4.1/demos/plugin/applets/SpreadSheet/example1.html
eventhen it is not working.
as you said you installed jre .1.3 and then 1.4 but i didn`t install 1.3 i directly installed 1.4. after installing 1.4 i downloaded the jre as you said. but still i am facing the same problem
and one thing else. i want to check it more then one system. i have to download it again and again can i download its setup once on my harddisk.
please send me the link
waiting for your reply
thanx in advance
Waris Mirza -
Urgent, please help. why the ListSelectionListener() called twice?
I had two JList, and every time, I click value in list1, it will call the ListSelectionListener() twice, and when I click on value in List2, it called the list2 actionListener twice also, I don't know why?
Please help.
The part of the code list below:
jList1 = new JList(words1);
JScrollPane scrollPane1 = new JScrollPane(jList1); jList1.setBackground(Color.lightGray);
jList1.setBorder(BorderFactory.createLoweredBevelBorder());
jList1.addListSelectionListener(new javax.swing.event.ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
jList1_valueChanged(e){
/* add Column_Name to the jList2*/
JScrollPane scrollPane2 = new JScrollPane(jList2);
jList2.setBackground(Color.lightGray);
jList2.setBorder(BorderFactory.createLoweredBevelBorder());
jList2.addListSelectionListener(new javax.swing.event.ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
jList2_valueChanged(e);
void jList1_valueChanged(ListSelectionEvent evt)
void jList2_valueChanged(ListSelectionEvent evt)
{ }You can call ListSelectionEvent.getValueIsChanging() to find out if the selection is in progress or if has been finished. You will get an event both when the user starts the selection (presses the button) and when he/she finishes it (lets go of the betton).
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Applet doesn't run with Tomcat - please help!
Hello!
I have a problem with running an applet in Eclipse IDE, using J2EE and a Dynamic Web Project and a Tomcat server.
The directory structure is:
ProjectName
- Java Resources->PackageName->AppletName.java
- built->classes->PackageName->AppletName.class
- WebContent->index.html
In my index.html page I put this code:
<applet code="PackageName.AppletName" width="500" height="200"></applet>
If I run this applet like a simple Java Applet, it runs.
But If I run this on server, my browser doesn't show me anything. I've try several posibilities, but it doesn't work. I should do some configurations on my Tomcat or I wrote something wrong on in my index.hml code, or my AppletName it isn't a simple java class?
Thank you for your time!
AdinaMy index.html is in WebContent, so I've already put the AppletClass.class there.
I've tried with a jar and if I run this on server it doesn't work either. I don't know if there is any Tomcat->server.xml settings...
It's so frustrating...
Any ideas?
The error message is:
Java Plug-in 1.6.0_22
Using JRE version 1.6.0_22-b04 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\adina
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
load: class app not found.
java.lang.ClassNotFoundException: app
at sun.plugin2.applet.Applet2ClassLoader.findClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass0(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(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.io.IOException: open HTTP connection failed:http://localhost:8080/app.class
at sun.plugin2.applet.Applet2ClassLoader.getBytes(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader.access$000(Unknown Source)
at sun.plugin2.applet.Applet2ClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 9 more
Exception: java.lang.ClassNotFoundException: app
Edited by: 811815 on Nov 17, 2010 12:11 AM -
Hi
I have the following select in a function containing in a function group.
SELECT SINGLE makt-maktx FROM makt WHERE makt-matnr = matnum.
I have declare in the topinclude Tables: makt but I still get the syntax message:
Unknown column name "MAKT-MAKTX". not determined until runtime, you cannot specify a field list.
Can anybody helphi check this...
tables: makt .
data: begin of itab1 occurs 0,
matnr like mara-matnr,
maktx like makt-maktx,
end of itab1 .
select-options:s_matnr for makt-matnr.
select single matnr maktx from makt
into itab1
where matnr in s_matnr .
append itab1 .
loop at itab1 .
write:/ itab1-matnr,
itab1-maktx.
endloop.
regards,
venkat. -
The applet fails to load. with 'red cross' screen JVM 1.6.19 and above
After updating the JVM to one of the latest version 1.6 builds, our users started to experience a problem with opening java applets.
All the users have JVM versions 1.6.0_19 – 1.6.0_26 on Windows 7/2008. The browser is IE8. On the server usually there is IIS7, with ‘Integrated Windows authentication’
on applet’s virtual folder. Applet’s classes are packaged into a signed JAR file. Both the client and the server are located in the same local area network with no proxy or firewall between them.
The applet’s website usually belongs to the trusted security zone. When loaded, the applet establishes HTTP connection to the server to get the necessary data.
When the user tries to open an HTML page containing the applet, there can be the following scenarios:
1. The applet fails to load. We’re getting a ‘red cross’ screen. All the HTML elements except of the applet are loaded OK.
From the IIS log we can see that the loading of the JAR file failed with the error code 401, the user name field in the log for the JAR is empty.
2. The java asks for the user name and password showing a popup ‘Authentication required’. At this moment we can see the following message in the Java console:
network: Firewall authentication: site=/XX.XX.XX.XX:XX, protocol=http, prompt=, scheme=ntlm
If the user enters the correct credentials, the applet loads OK. Even if the user checks the ‘Save the password in your password list’ checkbox, Java continues to ask for credentials
on every page reload. It’s worth to note that the company’s external firewall doesn’t get any requests from the applet.
The problems happen even when the client and the server are located on the same machine, but never happens when we use localhost as the server name in the page URL.
During investigations we found out the following workarounds:
1. Enabling anonymous authentication on the virtual folder always solves the problem.
2. Sometimes, changing security zone from ‘Trusted’ to ‘Local intranet’ solves the scenario 2 (‘Authentication required’ popup) problem.
It’s worth to note that changing the security zone never helps if the page URL contains dots (for example, uses IP address instead the server name).
3. Upgrading to IE9 solves the scenario 2 problem partly: Java asks for the credentials only once.I have the same issue. I use single sign-on with IIS 7 and Integrated Window authentication on the tomcat virtual folder. The applet jar file is on the root directory of the web application (the same level of index.html). So I use '.' as the code_base to call the applet from javascript.
So when I launch my web application into a browser, the auto-connection is successfully performed (single sign-on through Upstream, kerberos, remote_user, ...). But when I want to launch the applet in the web application, a new authentication panel (red panel with "authentication required") occurs in order to set credentials (login, password, domain) with the message in the java applet console:
"network: Firewall authentication: site=myApplicationUrl, protocol=http, prompt=, scheme=ntlm"
So why the applet doesn't inherit previous credentials in this case ??
Have you solved this problem ?
Thanks
Edited by: 886341 on 20 sept. 2011 08:56 -
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And in system prefs/language and text/input languages, simplified chinese and traditional chinese are ticked as usual with handwriting options on !!!!Please search the forum for "chinese" to find the many other earlier posts about your issue, like
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www.apple.com/feedback/iphone.html
No one from Apple is listening on these forums. -
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import java.awt.*;
import java.awt.event.*;
import java.io.*;
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private File file= new File ("goal.avi");
private PlayClip () {
instance=null;
initComponents();
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if (instance==null)
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return instance;
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JButton OK = new JButton ("OK");
OK.addActionListener (
new ActionListener () {
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player.close ();
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dispose();
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if (file == null) {
return;
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JOptionPane.showMessageDialog (this, "Invalid file or location", "Error loading file", JOptionPane.ERROR_MESSAGE );
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if (player == null )
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player.close ();
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public void controllerUpdate (ControllerEvent e) {
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Component visualComponent = player.getVisualComponent ();
if (visualComponent != null)
c.add (visualComponent, BorderLayout.CENTER);
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if (controlsComponent != null)
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}JDunlop,
thanks for your quick reply to my java.sun.com forum posting! i just got back from vacation, so i didn't get a chance to try your method til now. i pulled your email address off the website to update you on my problem playing an avi file in JMStudio (JMF).
as per your instructions, i downloaded the divx player at www.divx.com and tried to play the avi file. this is the error the divx player gives:
Divx Player 2.1
The file contains unknown video data
The file contains the following type of data:
Video data: FOURCC code "MP42"
You may need to install a new video codec on your computer to watch this video
Some quick questions:
1. Where could I find the "MP42" codec to play my avi file in JMStudio (JMF)? Does java.sun.com have video codecs?
2. You mentioned in your posting "If you don't have the one that was used in the encoding, your out of luck." Does this mean that I need to know how the avi file was originally coded and have the original codec to decode (play) it?
Thanks,
lac410
P.S. If you need more Duke Dollars for your help, I'd be happy to award them to you.
Re: Please help: Why JMF does't play .avi video clip?
Author: JDunlop Jun 5, 2003 5:00 AM
sounds to me like you are missing a video codecs. If you don't have the one that was used in the encoding, your out of luck. Download the player from divx.com, it will tell you which codecs the video needs (if it won't play). You can then search the net for that particular codecs. -
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What is the solution of this problem?
Any help would be appreciated.
ThanksSo you're saying that you just do a file|open from your browser and open the HTML page and all is well, but when you moved the HTML page and the class file to somewhere under the docroot of your Apache installation you can hit the page but your browser doesn't load the applet, is that right?
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package javaapplication1;
import java.awt.Container;
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import java.awt.event.*;
import javax.swing.*;
public class MoneyCollect extends JApplet implements ActionListener {
private JLabel promt;
private JTextField input;
private int total;
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c.setLayout( new FlowLayout() );
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input.addActionListener(this);
c.add(promt);
c.add(input);
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}...because changing this:
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public class MoneyCollect extends JAppletdoes not create an applet. Get a beginning java book and start reading it. I recommend "Java2: A Beginner's Guide".
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[http://java.sun.com/docs/books/tutorial/deployment/applet/getStarted.html] -
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Welcome to Apple Support Communities.
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