Java Plugin for Firefox 4 on Ubuntu

I am running Ubuntu 10.04 LTS with the Kubuntuu desktop, and Firefox 4.

I cannot get the java plugin to work.

how do I get the java plugin to work in this environment?
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DrDamnitAsked:
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DrDamnitConnect With a Mentor Author Commented:
Never could get this to work. Installed Chrome. Chrome works out of the box.
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Sudeep SharmaTechnical DesignerCommented:
If you want to install JRE on Ubuntu then this link below would help:

http://www.ubuntugeek.com/how-install-sun-java-runtime-environment-jre-in-ubuntu-10-04-lucid-lynx.html

Sudeep
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for_yanCommented:

About installation of Java on Ubuntu
http://jdk-distros.java.net/ubuntu.html
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for_yanCommented:
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for_yanCommented:


And this the discussion about issues with Java plugin for Firefox(not suer it is about Firefox 4, though):
http://www.php-architect.com/blog/2010/10/19/installing-java-plugin-for-firefox-on-ubuntu-10-10-maverick/
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DrDamnitAuthor Commented:
Followed your last link. Stuck at the last bit:

update-alternatives: warning: forcing reinstallation of alternative /usr/lib/jvm/java-6-sun/jre/lib/amd64/libnpjp2.so because link group mozilla-javaplugin.so is broken.

about:plugins does NOT show the java plugin....
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for_yanCommented:
in my FireFox (on winodws and not yet 4) it shows plugins in Tools --> add-ons not in about.

Can you specify waht in particular is not working - does your Firefox not run Java applets ?
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wesly_chenCommented:
It is Java 64bit plugin issue.
In the terminal
Do
$ file /usr/lib/jvm/java-6-sun/jre/lib/amd64/libnpjp2.so
It this file exist and show "ELF 64-bit LSB shared object" or "symbolic link to ..."
Then
$ sudo ln -s /usr/lib/jvm/java-6-sun/jre/lib/amd64/libnpjp2.so /usr/lib64/firefox-addons/plugins

For more details:
http://sites.google.com/site/easylinuxtipsproject/java
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