If Java is working, you will see a pink rectangle above with one line of text that says something like: Java Version 1.8.0_25 from Oracle Corporation or Java Version 1.7.0_67 from Oracle Corporation or Java Version 1.6.0_45 from Sun Microsystems Inc. RUNNING THIS APPLET: Java security has changed quite a lot over the years and running this applet has gotten much more complicated. In the Bizarro world of Oracle, unsigned applets are treated as more dangerous than signed applets. First, unsigned applets run in a restricted Java sandbox whereas signed applets are given unrestricted access to the system.Yes, the sandbox has been buggy and broken, but some security is better than none.With recent Java versions, you'll also need to confirm that you want to run Java, if prompted.The Java plugin name shown will depend on your operating system and Java version.Download the java package for linux on com and store the file in the folder Downloads.(if you have Linux x64, download the x64 bit package, do not download the RPM!! In your terminal, run the command thats create a new subfolder in the directory sudo update-alternatives --install "/usr/bin/java" "java" "/opt/java/64/jre1.7.0_09/bin/java" 1 sudo update-alternatives --set java /opt/java/64/jre1.7.0_09/bin/java 1.Mozilla applications are regularly updated for security and stability; however, Mozilla does not provide updates for plug-ins.
I say this because multiple copies of Java can sometimes be installed with different browsers using different copies.Second, it shows a faith in the Certificate Authority system that is unwarranted. You first have to respond to three different popup windows asking for permission and warning of the end of the earth, but it will run.February 2017: This applet will not run at all, immediately after installing Java 8 Update 121 on Windows 7. Oracle suggests that Java developers move from applets to Java Web Start.Also, Java can be enabled in one browser and disabled in another.This is my favorite - straight from the horse's mouth (so to speak).