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JApplet Not Running In Firefox
Hello everyone, I have a JApplet that is embedded in a website and refuses to run in Firefox. The java environment just shuts down after a little bit of time, no reported errors or anything, just stops running. I've confirmed it happens on more than one machine and I've confirmed that the JApplet works fine in Chrome.
Here is the url if anyone wants to see what I mean: Airline Management Simulation Game
Any ideas as to what would cause this to happen?
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Join the Airline Management Simulation Game to manage your own airline against other users in a virtual recreation of the United States Airline Industry. For more details, visit: http://airlinegame.orgfree.com/
Related threads:
Re: JApplet Not Running In Firefox
Yikes, yeah, you've got a serious error in there somewhere that's causing Java to exit entirely (it crashed another applet I also had running). I don't see an error message or anything either. What kinds of weird stuff are you doing?
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Static Void Games - Play indie games, learn from game tutorials and source code, upload your own games!
Re: JApplet Not Running In Firefox
Just reading some text files on the website, nothing too ridiculous. Why would it crash firefox but not chrome though?
NOTE TO NEW PEOPLE LOOKING FOR HELP ON FORUM:
When asking for help, please follow these guidelines to receive better and more prompt help:
1. Put your code in Java Tags. To do this, put [highlight=java] before your code and [/highlight] after your code.
2. Give full details of errors and provide us with as much information about the situation as possible.
3. Give us an example of what the output should look like when done correctly.
Join the Airline Management Simulation Game to manage your own airline against other users in a virtual recreation of the United States Airline Industry. For more details, visit: http://airlinegame.orgfree.com/
Re: JApplet Not Running In Firefox
That's a really good question, and unfortunately, I have no idea. Are you using any plugins or calling javascript or anything like that?
Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
Static Void Games - Play indie games, learn from game tutorials and source code, upload your own games!
Re: JApplet Not Running In Firefox
When I downloaded it and tried to load it into a browser I get this in the java console:
java.security.AccessControlException: access denied (java.net.SocketPermission airlinemanagegame.zxq.net:80 connect,resolve)
Re: JApplet Not Running In Firefox
How are you doing the reading of the files?
Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
Static Void Games - Play indie games, learn from game tutorials and source code, upload your own games!
Re: JApplet Not Running In Firefox
No, I'm not calling any external stuff other than text files.Originally Posted by KevinWorkman
Did you run it from the website or try to run it locally? If you tried the first, try again because I was just making changes and you might have got caught between the 6 re-uploads I just did. If you did the latter, then I wouldn't expect it to work since you cannot access the data files from an external source.When I downloaded it and tried to load it into a browser I get this in the java console:
java.security.AccessControlException: access denied (java.net.SocketPermission airlinemanagegame.zxq.net:80 connect,resolve)
1) Creating a URL (using http, not ftp) to the fileHow are you doing the reading of the files?
2) Creating a URLConnection to the URL
3) Creating a BufferedReader and sending it a new InputStreamReader, which I am sending the InputStream of the URLConnection
4) Using the readLine() method to get each line.
Pretty basic.
NOTE TO NEW PEOPLE LOOKING FOR HELP ON FORUM:
When asking for help, please follow these guidelines to receive better and more prompt help:
1. Put your code in Java Tags. To do this, put [highlight=java] before your code and [/highlight] after your code.
2. Give full details of errors and provide us with as much information about the situation as possible.
3. Give us an example of what the output should look like when done correctly.
Join the Airline Management Simulation Game to manage your own airline against other users in a virtual recreation of the United States Airline Industry. For more details, visit: http://airlinegame.orgfree.com/
Re: JApplet Not Running In Firefox
What files?
I have a utility I use to get a website's files. I downloaded the html and the jar files and run a test from anhtml file on my pc. I also wrote an applet wrapper so I can run it as an Application with a security manager.
It looks like it does some FTP stuff: port 21 and then some more ports for the transfers. Then it prompts me for userid and password or New Account. When I enter a new account it goes away for a while and I eventually close it.
Re: JApplet Not Running In Firefox
In order to create a new account, it does an FTP call to a file, but it uses the specific URL of the file instead of a local call to the file (if you are loading an already existing account, it simply reads the online file instead of doing an FTP call). So when you are creating the new account, it is trying to do the FTP call to the online file, which it cannot do because my host does not allow remote access to any files. Interestingly enough, there is a new account named: _test_company. Is that yours?
NOTE TO NEW PEOPLE LOOKING FOR HELP ON FORUM:
When asking for help, please follow these guidelines to receive better and more prompt help:
1. Put your code in Java Tags. To do this, put [highlight=java] before your code and [/highlight] after your code.
2. Give full details of errors and provide us with as much information about the situation as possible.
3. Give us an example of what the output should look like when done correctly.
Join the Airline Management Simulation Game to manage your own airline against other users in a virtual recreation of the United States Airline Industry. For more details, visit: http://airlinegame.orgfree.com/
Re: JApplet Not Running In Firefox
No, I used something like: asdfasdf
Re: JApplet Not Running In Firefox
Applet is always running inside a restricted environment called SandBox, you need to assign permission to your Applet either by providing .java.policy permission on client computer, or by signing the applet using keytool and jarsigner utilities.
Have a read:
Signed Applets
Grant the Required Permission
immutable objects
Last edited by ha.minh.nam; December 4th, 2011 at 07:27 PM.
Re: JApplet Not Running In Firefox
The problem is fixed now, but for clarification: That is only true when you are trying to access the client computer. The data files I was reading was local to the applet on the web server. Since the files are located on the web server instead of the client computer, additional permissions are not required to read them.
NOTE TO NEW PEOPLE LOOKING FOR HELP ON FORUM:
When asking for help, please follow these guidelines to receive better and more prompt help:
1. Put your code in Java Tags. To do this, put [highlight=java] before your code and [/highlight] after your code.
2. Give full details of errors and provide us with as much information about the situation as possible.
3. Give us an example of what the output should look like when done correctly.
Join the Airline Management Simulation Game to manage your own airline against other users in a virtual recreation of the United States Airline Industry. For more details, visit: http://airlinegame.orgfree.com/
Re: JApplet Not Running In Firefox
Can you tell us what the fix was?The problem is fixed now,
Re: JApplet Not Running In Firefox
I'm not entirely sure. All I did was put the file reading on a separate thread and now it works. Maybe there is something weird with firefox where it was crashing the thread or something, but all I know is that it now works...
NOTE TO NEW PEOPLE LOOKING FOR HELP ON FORUM:
When asking for help, please follow these guidelines to receive better and more prompt help:
1. Put your code in Java Tags. To do this, put [highlight=java] before your code and [/highlight] after your code.
2. Give full details of errors and provide us with as much information about the situation as possible.
3. Give us an example of what the output should look like when done correctly.
Join the Airline Management Simulation Game to manage your own airline against other users in a virtual recreation of the United States Airline Industry. For more details, visit: http://airlinegame.orgfree.com/
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