upgraded to 13.04 now getting JREDetection "Your security settings have blocked an untrusted application from running

Question

I upgraded Ubuntu 12.10 to 13.04 upgraded java to 1.8.0-ea-b118 and still cannot run my application to connect to my office. I have checked all the options and spent all day looking for hits on this issue but cannot fins a solution. Thanks. Sorry meant to add that this is a url running in Chrome that starts a java program. thanks.

Solution 1

The following can be found on this page

Try to find the installation path of java control panel. From the terminal

$locate jcontrol
/usr/bin/jcontrol
/usr/java/jre1.7.0_25/bin/jcontrol
/usr/java/jre1.7.0_25/lib/desktop/icons/HighContrast/16x16/apps/sun-jcontrol.png
....
/usr/java/jre1.7.0_51/bin/jcontrol
....

In this case /usr/java/jre1.7.0_51/bin/jcontrol is the one you want. So launch it from terminal /usr/java/jre1.7.0_51/bin/jcontrol Then you will be able to change the security setting.

Solution 2

Java no longer allows unsigned or self-signed applets to run by default.

You need to edit the file at ~/.java/deployment/deployment.properties and add a line (or edit, if it exists) to set deployment.security.level=MEDIUM.

Additionally, see the advice here for enabling Java in the web browser on Ubuntu http://java.com/en/download/help/enable_browser_ubuntu.xml

Comments

[Zeeshan]

This worked for me. Although the site I was trying to run applet from was on http instead of https. So it didn't work even after changing security setting to Medium. I had to add the site to exceptions list.

[Bibi424]

Thank you. I solved my issue following this but in my case path was /usr/lib/jvm/java-8-oracle/bin/jcontrol

[Skynet]

Clean and easy!