Menu
Before you close this for being a duplicate for one of the below posts, Java changed the requirements for runnable applets in Java 1.8. These requirements make it impossible to run an applet that is not signed by a trusted certificate. The only way to get around this is to add websites to an exception list, which isn't working for me either strangely.
Related, but out of date, posts:
Me and my 'company' have created a game that we want to put on our website. We converted the java app into an Applet. The applet runs in the appletViewer perfectly but it will not run in a webpage. Here is our manifest that we are using:
Manifest-Version: 1.0
Application-Name: Battle-Ship
Permissions: sandbox
Created-By: Chetter-Games
// empty line
The jar file is signed using a keystore that we have generated ourselfs (it is not from a trusted certificate distributor). Here is the output from jarsigner:
Enter Passphrase for keystore:
jar signed.
Warning:
No -tsa or -tsacert is provided and this jar is not timestamped. Without a
timestamp, users may not be able to validate this jar after the signer
certificate's expiration date (2015-12-09) or after any future revocation date.
I was pretty sure that this error is negligible. This might cause problems later, but we just want to get something up and running right now.
Here is the html for our page with the embedded applet:
<html>
<body>
<applet code='battleShip.WindowApplet'
archive='signed-BattleShip.jar'
width=500
height=500>
</applet>
</body>
</html>
Here is a server-side ls of our working directory, which contains the applet page battle.html and the applet signed-BattleShip.jar:
-rw-rw-r-- 1 www-data www-data 12136 Dec 5 21:57 back.jpg
-rw-r--r-- 1 www-data www-data 195 Dec 9 14:25 battle.html
-rw-rw-r-- 1 www-data www-data 116 Dec 9 12:59 index.html
-rw-r--r-- 1 www-data www-data 27509 Dec 10 12:19 signed-BattleShip.jar
No matter what we try, we always get this prompt:
So far we have tried all of the following:
We think it has something to do with there no longer being a 'medium' option in the java control panel. We are just trying to get something up and running, any help would be very appreciated.
917
Finally got my applet to work after hours and hours of messing around with it. Hopefully this works for you and saves others from hours of frustration:
My Manifest file includes the following:
Manifest-Version: 1.0 Permissions: sandbox Application-Name: Your Application Name Goes Here (Blank Line)
My HTML file includes:
And as for adding the domain to the Site Exception List, NOTHING worked until I added it in this format:
http://mywebsite.com/ (note that it doesn't have the www. and includes a forward slash at the end. No other combination worked for me.)
Make sure to include the manifest file in your jar. I used Eclipse Juno and this function is found when you export to a JAR. I placed my manifest.txt file in the src directory where the main classes were. I tried other manifest attributes like Codebase and Entry-Point, etc. but those gave me problems as well, so I removed them.
My game currently runs perfectly aside from one problem - sound. No sound plays on the web version, though they play fine when run through eclipse. I'm satisfied with it as it stands, currently, and got an A for the project anyway... so i'll fix the sound issue later.
Hope this helps!
Posted the following previously, but it was removed due to not being an answer (but i did return with an answer, as promised). Mods, remove this if you want, but I think a little background might help other visitors identify with the issues they're having.
I'm in the exact same position. I have a final project (also a game) due this week and I can't get my applet to load.
Been researching for hours now and am still stuck. The weird thing is, I tested a simple "Hello World" applet that just prints the string on the screen, and that worked fine. I also tried running an applet with multiple classes to see if that was causing any issues, yet that ran fine, too. Then I tried running that same applet in a jar file, and that also worked.
Tried loading my game with high hopes but was crushed to see that java blocked it. Funny thing is, I can no longer run the simple applets now...
Not sure what that implies. Either java's security guards are buggy, or if the site gets flagged because of one "threat", it shuts down all applets from the same domain. I tried adding all variations of the domain to the Exception Site List to no avail.
I'm going to keep trying, because my grade depends on it - will post here if I'm able to find a fix.
I'm running win7 64bit, java 8 update 25 (1.8.0), browsers - chrome, ie x86, ie64, applet compiles and runs fine in Eclipse 64bit. My game includes about 18 classes, and a bunch of png, gif, and wav files. None of the classes make any outside url/http requests or anything like that.
78
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
