Calling a method in a signed applet from JavaScript does not do anything. Same functionality works in IE, Safari and Chrome. Is this a limitation of the JavaScript implementation?
It does not seem that the JavaScript engine in FF 4 is allowing me to call inside a signed Java applet. When calling the script the browser does not do anything. The same functionality works in IE, Safari, Chrome.
It does not seem that the JavaScript engine in FF 4 is allowing me to call inside a signed Java applet. When calling the script the browser does not do anything. The same functionality works in IE, Safari, Chrome.
Similar Messages
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Problem with accessing Signed Applet from javascript method
Hi,
I am facing the following problem while accessing Signed Applet from javascript method.
java.security.AccessControlException: access denied (java.io.FilePermission c:/temp.txt read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at FileTest.testPerm(FileTest.java:19)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.invoke.JSInvoke.invoke(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
at sun.plugin.com.MethodDispatcher.invoke(Unknown Source)
at sun.plugin.com.DispatchImpl.invokeImpl(Unknown Source)
at sun.plugin.com.DispatchImpl$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.com.DispatchImpl.invoke(Unknown Source)
I am using jdk1.5 for my development...
Can anyone help to resolve this security issue. Urgent...
Thanks in advance.Hey thanks. I wasn't able to get it to work with that sample but I did find this very similar code that does allow javascript to call JFileChooser in an applets public method.
java.security.AccessController.doPrivileged(
new java.security.PrivilegedAction()
public Object run(){
//do your special code here
return null; //return whatever you want
It seems a bit tempermental in that if you don't select a file quickly, it will hang the browser....no perfect solution but I'm going in the right direction.
Thanks,
Scott -
Calling1.4.1 signed applet from Javascript causes keyboard/focus problems
Pretty sure there's a JRE bug here, but I'm posting to forums before I open one in case I'm missing something obvious :-)
This issue may be specific to IE, I haven't tested elsewhere yet. Our web application is centered around a signed applet that is initialized with XML data via Javascript. We first noticed the problem when our users started upgrading from the 1.3.x plug-in to the 1.4.x plug-in. The major symptom was that shortcut keys stopped working. I debugged the problem off and on for about a month before I boiled it down to a very simple program that demonstrates the issue (included below). Basically, the program has a function that adds a JButton to a JPanel and registers a keyboard listener (using the new DefaultKeyboardFocusManager class) that prints a message to the console. This function is called by the applet's init() method, as well as by a public method that can be called from Javascript (called callMeFromJavascript()). I also included a very simple HTML file that provides a button that calls the callMeFromJavascript() method. You can test this out yourself: To recreate, compile the class below, JAR it up, sign the JAR, and put in the same dir with the HTML file. Load the HTML file in IE 5.0 or greater, and bring the console up in a window right next to it. Now click the button that says init--you should see the small box appear inside the button that indicates it has the focus. Now press some keys on your keyboard. You should see "KEY PRESSED!!!" appearing in the console. This is proper behavior. Now click the Init Applet from Javascript button. It has removed the button called init, and added one called "javascript". Press this button. Notice there is no focus occurring. Now press your keyboard. No keyboard events are registered.
Where is gets interesting is that if you go back and make this an unsigned applet, and try it again, everything works fine. This bug only occurs if the applet is signed.
Furthermore, if you try it in 1.3, signed or unsigned, it also works. So this is almost certainly a 1.4 bug.
Anyone disagree? Better yet, anyone have a workaround? I've tried everything I could think of, including launching a thread from the init() method that sets up the components, and then just waits for the data to be set by Javascript. But it seems that ANY communication between the method called by Javascript and the code originating in init() corrupts something and we don't get keyboard events. This bug is killing my users who are very reliant on their shortcut keys for productivity, and we have a somewhat unique user interface that relies on Javascript for initialization. Any help or suggestions are appreciated.
================================================================
Java Applet (Put it in a signed JAR called mainapplet.jar)
================================================================
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class MainApplet extends JApplet implements KeyEventDispatcher
JPanel test;
public void init()
System.out.println("init called");
setUp("init");
public void callMeFromJavascript()
System.out.println("callMeFromJavascript called");
setUp("javascript");
private void setUp(String label)
getContentPane().removeAll();
test = new JPanel();
getContentPane().add( test );
JButton button = new JButton(label);
test.add( button );
test.updateUI();
DefaultKeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(this);
public boolean dispatchKeyEvent(KeyEvent e)
System.out.println("== KEY PRESSED!!! ==");
return false;
}================================================================
HTML
================================================================
<form>
<APPLET code="MainApplet" archive="mainapplet.jar" align="baseline" id="blah"
width="200" height="400">
No Java 2 SDK, Standard Edition v 1.4.1 support for APPLET!!
</APPLET>
<p>
<input type="button" onClick="document.blah.callMeFromJavascript();" value="Init Applet via Javascript">
</form>I tried adding the requestFocus() line you suggested... Same behavior.
A good thought, but as I mention in my description, the applet has no trouble gaining the focus initially (when init() is called). From what I have seen, it is only when the call stack has been touched by Javascript that I see problems. This is strange though: Your post gave me the idea of popping the whole panel into a JFrame... I tried it, and the keyboard/focus problem went away! It seems to happen only when the component hierarchy is descended from the JApplet's content pane. So that adds yet another variable: JRE 1.4 + Signed + Javascript + components descended from JApplet content pane.
And yes, signed or unsigned DOES seem to make a difference. Don't ask me to explain why, but I have run this little applet through quite a few single variable tests (change one variable and see what happens). The same JAR that can't receive keyboard events when signed, works just fine unsigned. Trust me, I'm just as baffled as you are. -
I tried this extension (https://addons.mozilla.org/en-US/firefox/addon/customizable-shortcuts/), but it doesn't appear to support editing the current "Alt+Enter" to change to "Meta+Enter" where Meta = Command on a Mac.
I want to switch to Firefox, but this is the one and only thing preventing me from doing so! I have a decade plus of muscle memory using the key next to the space bar + enter to open a new tab. Please help!There is an older extension named keyconfig (last updated in 2011) which might be able to do it. I haven't used it for quite a while so I'm not sure how well it works any more.
http://forums.mozillazine.org/viewtopic.php?f=48&t=72994 (link in first post) -
How do I migrate bookmarks from Camino to Firefox? My only options are Safari and Chrome.
I've followed the on-site directions for this migration ("migrate from another browser") but my only options via that route are Safari and Chrome.
Export bookmarks from camino using the instructions at http://caminobrowser.org/documentation/bookmarks/#export .
Then import the html file into firefox using the instructions in the [[Import Bookmarks from a HTML file]] article.
Does that fix the problem? -
I am playing a game called temple run on my phone.But my achievements are not being uploaded to my Game Center account.How can i solve this issue?
contact the developer?
-
Can i call signed applet from jsf page in sun studio creator
Hello javites,
I want to know whether i can call signed applet from jsf page in sun studio creator. If possible, how do i go about it.
Thanks.This tutorial may help:
http://developers.sun.com/prodtech/javatools/jscreator/reference/techart/2/applet.html?feed=DSC -
Error while accessing a public method of applet from javascript.
Hi,
I am getting "Object doesn't support this property or method" error
when accessing a public method of applet from javascript in IE 6 using
document.applets[0].myMethod();
The same is working in IE 7.
Thanks in advance.
Regards,
PhanikanthI don't know why it happens, but this works for me in both versions:
<applet ..... name="MyApplet">
</applet>and in javascript use
document.MyApplet.myMethod() -
How to call java method having array as argument from c++ ?
Hello sir,
how to call java method having array as arguments from c++;
here is java code which is called from c++
class PQR {
public void xyz(int[] ia) {
System.out.println("hi");
for (int i = 0; i < ia.length; i++)
System.out.println(ia);
suppose all jvm invocation is done...For someone well versed in java, C++ and JNI although tedious that should be obvious.
For someone not well versed in all three it is going to be very difficult.
Even for someone that does have knowledge in all of those areas coming up with a C++ interface that reflects that functionality in a dynamic way such that anyone is will to use it is going to be quite an adventure.
At any rate to start building it you do exactly the same thing that you would in java.
1. Extract everything in the jar via the zip package
2. For each found instance extract all of the methods, return types, parameters, etc and build a description tree for each class.
Doing all of that in C++ is going to take a LOT of code. If someone wanted an estimate from me it would take me 6 months to do it. And before I would even attempt it I would get them to explain to me in detail exactly how they thought they were going to use it when I was done because I can't see any reasonable way to do that.
I left out the description tree itself. I suppose you could duplicate the entire reflection api in C++.
Now perhaps if it was much, much more constrained, like to only those classes that implement a single interface then that would be more reasonable. -
The detach from template function in Dreamweaver CC does not seem to be functional
Can some explain.
Bruce K.Hi Lalita
Yes you are correct, I TRY THE Modify -> Templates -> Detach from Template. I have built over 50 websites with this method using Modify -> Templates -> Detach from Template in DW CS5.5
After a save a page to a template for future ref.
I create a new page using this temp. but can not use the Modify -> Templates -> Detach from Template. The Detach from Template is not functional. It is there but when I mouse over its not operative.
Does DW CC need update maybe.
Thanks
Bruce -
Applet compiles but does not appear...
the applet compiles but does not appear :(
all that appears is a blank box...hopefully someone can help
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
public class program2 extends Applet implements ActionListener
private Button btLeft, btRight, btUp, btDown, btBgYellow,
btBgRed, btBgBlue, btBgOrange, btTxtRed,btTxtYellow, btTxtBlue,
btTxtOrange, btFtHel, btFtCr, btFtTr, btFtSy;
private MessagePanel messagePanel;
private Panel p = new Panel();
public void init()
p.setLayout(new BorderLayout());
messagePanel = new MessagePanel("Java is Life");
messagePanel.setBackground(Color.white);
//directional buttons
Panel pButtons = new Panel();
pButtons.setLayout(new FlowLayout());
pButtons.add(btLeft = new Button());
pButtons.add(btRight = new Button());
pButtons.add(btUp = new Button());
pButtons.add(btDown = new Button());
//Background buttons
Panel BgButtons = new Panel();
BgButtons.setLayout(new FlowLayout());
BgButtons.add(btBgRed = new Button());
btBgRed.setBackground(Color.red);
BgButtons.add(btBgYellow = new Button());
btBgYellow.setBackground(Color.yellow);
BgButtons.add(btBgBlue = new Button());
btBgBlue.setBackground(Color.blue);
BgButtons.add(btBgOrange = new Button());
btBgOrange.setBackground(Color.orange);
//text color buttons
Panel txtButtons = new Panel();
txtButtons.setLayout(new GridLayout(4,1));
txtButtons.add(btTxtRed = new Button());
btTxtRed.setBackground(Color.red);
txtButtons.add(btTxtYellow = new Button());
btTxtYellow.setBackground(Color.yellow);
txtButtons.add(btTxtBlue = new Button());
btTxtBlue.setBackground(Color.blue);
txtButtons.add(btTxtOrange = new Button());
btTxtOrange.setBackground(Color.orange);
//font buttons
Panel ftButtons = new Panel();
ftButtons.setLayout(new GridLayout(4,1));
ftButtons.add(btFtHel = new Button());
ftButtons.add(btFtCr = new Button());
ftButtons.add(btFtTr = new Button());
ftButtons.add(btFtSy = new Button());
//layout
p.add(messagePanel, BorderLayout.CENTER);//set center 1st
p.add(pButtons, BorderLayout.SOUTH);
p.add(BgButtons, BorderLayout.NORTH);
p.add(txtButtons, BorderLayout.EAST);
p.add(ftButtons, BorderLayout.WEST);
//listeners
btLeft.addActionListener(this);
btRight.addActionListener(this);
btUp.addActionListener(this);
btDown.addActionListener(this);
btBgRed.addActionListener(this);
btBgYellow.addActionListener(this);
btBgBlue.addActionListener(this);
btBgOrange.addActionListener(this);
btTxtRed.addActionListener(this);
btTxtYellow.addActionListener(this);
btTxtBlue.addActionListener(this);
btTxtOrange.addActionListener(this);
btFtHel.addActionListener(this);
btFtCr.addActionListener(this);
btFtTr.addActionListener(this);
btFtSy.addActionListener(this);
//implement listener
public void actionPerformed(ActionEvent e)
if(e.getSource() == btLeft)
left();
else if(e.getSource() == btRight)
right();
else if(e.getSource() == btUp)
up();
else if(e.getSource() == btDown)
down();
else if(e.getSource() == btBgRed)
red();
else if(e.getSource() == btBgYellow)
yellow();
else if(e.getSource() == btBgBlue)
blue();
else if(e.getSource() == btBgOrange)
orange();
else if(e.getSource() == btTxtRed)
redText();
else if(e.getSource() == btTxtYellow)
yellowText();
else if(e.getSource() == btTxtBlue)
blueText();
else if(e.getSource() == btTxtOrange)
orangeText();
else if(e.getSource() == btFtHel)
helvetica();
else if(e.getSource() == btFtCr)
courier();
else if(e.getSource() == btFtTr)
times();
else if(e.getSource() == btFtSy)
symbol();
//directional methods :0)
private void left()
int x = messagePanel.getXCoordinate();
if(x > 10)
messagePanel.setXCoordinate(x - 10);
messagePanel.repaint();
private void right()
int x = messagePanel.getXCoordinate();
if(x < (getSize().width - 5))
messagePanel.setXCoordinate(x + 5);
messagePanel.repaint();
private void up()
int y = messagePanel.getYCoordinate();
if(y < (getSize().height - 10))
messagePanel.setYCoordinate(y - 10);
messagePanel.repaint();
private void down()
int y = messagePanel.getYCoordinate();
if(y < (getSize().height + 10))
messagePanel.setYCoordinate(y + 10);
messagePanel.repaint();
//background methods :)
private void red()
messagePanel.setBackground(Color.red);
private void yellow()
messagePanel.setBackground(Color.yellow);
private void blue()
messagePanel.setBackground(Color.blue);
private void orange()
messagePanel.setBackground(Color.orange);
//text color methods :)
private void redText()
messagePanel.setForeground(Color.red);
private void yellowText()
messagePanel.setForeground(Color.yellow);
private void blueText()
messagePanel.setForeground(Color.blue);
private void orangeText()
messagePanel.setForeground(Color.orange);
private void helvetica()
Font myfont = new Font("Helvetica", Font.PLAIN,12);
messagePanel.setFont(myfont);
private void courier()
Font myfont = new Font("Courier", Font.PLAIN,12);
messagePanel.setFont(myfont);
private void times()
Font myfont = new Font("TimesRoman", Font.PLAIN,12);
messagePanel.setFont(myfont);
private void symbol()
Font myfont = new Font("Symbol", Font.PLAIN,12);
messagePanel.setFont(myfont);You add everything to the Panel p but you never add that panel to the applet. What you probably want is to add everything to the applet. An applet is a special kind of panel so you can just change "p" to "this" everywhere in init and remove the declaration of p at the top.
-
The red X has appeared in my Ipod Classic Screen. Apple support tells me that I need to first put it manually on disk mode. to put it on disk mode I ought to press menu and select buton togeher, when the apple sign shows up, hold select button and play together.
After pressing Menu and Select, when the Apple sign appears, I immediately press select and play/pause, but again the red X sign appears. so it does not go to Disk Mode. Has anyone had this issue? I would be grateful if you could tell me what to do.Thank you everyone for the replies. It defiantly helped point me in the right direction. With any luck, I will have my replacement phone sometime tomorrow.
I was able to call the iPhone support line this morning. The Apple rep stayed on the line with me for about an hour until he was sure the new phone would ship out. For $199 plus $29 for expedited handling I was able to get the replacement ordered with overnight shipping. Since the replacement doesn’t involve ATT&T I have no reason to suspect any further delays. Kudos to the Apple rep that helped me straighten out this mess.
It’s a shame that AT&T cares so little for their existing customers. Not only did they try to sell me the same phone for $499, they outright refused to help me. They also lied to me on numerous occasions and strung me along for close to three weeks for something that only took an hour to complete with the Apple rep.
I filed a formal complaint against AT&T through the Better Business Burrow as well as requested a review of our cooperate contract with AT&T. Our company currently has over 3000 phones with AT&T and there contract comes up for bid the end of our fiscal year (this October). We will be giving it heavy consideration before we consider renewing their contract.
I doubt that any of that will matter to a company that cares so little about their customers, but you never know.
Thanks again for all your help. I would probably still be trying to get my replacement for the next few months if it wasn’t for your suggestions.
-Niel -
I have my iphone4 activated and working since 3days, i purchased it from ebay with 1year warranty, when i check the serial number from Apple store at Bangalore Forum mall, they say that it does not show anything and 'OUT OF WARRANTY'.
Now i have a problem in it, all icons just shake and system hangs, needs restarting.You need to go back to the person you bought it from. Sounds like they may have sold you phone that is not as described.
Did you check the warranty status before purchasing it? -
Is there any way to actually delete messages from my iPhone? I have already synced my iPhone, updated it, and deleted all of my backups but the messages I have "deleted" still appear in the spotlight search.
If you already have an iPhone backup or an iCloud backup, just follow the instructions on the page below
http://www.whatsapp.com/faq/en/iphone/20888066
If you didn't back up your iPhone, try to use WhatsApp Pocket to recover your chats:
http://www.fireebok.com/whatsapp-pocket.html -
Version 8.1 Can't Activate, Can't Update, Can't create/export NX *.prt Files to 3D PDF. Screen Capture feature does not properly represent Model/Bodies. Printing from NX does not recognize Adobe Acrobat 3D as a printer to try and export.
I was able to register it though.Not a surprise. The Acrobat 8 product family passed into End of Support back in 2011.
Be well...
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