JRE not installed/Java is disabled on Ubuntu 14 but works on another distro

Question

I need to run some js from a webpage, but when it tries to load I got the error of the subject topic. I'm running ubuntu 14, FF 50xx, and latest version of java.

But, that part of the page that came from a .cgi works on FF 41, mint 14xx and:

java version "1.7.0_79" OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.14.04.1) OpenJDK Client VM (build 24.79-b02, mixed mode, sharing)

I ran FF 41xx and didn't work. I download the exact same version of java: openjdk-7-source_7u79-2.5.6-0ubuntu1.14.04.1_all.deb

Purged everything else : apt-get purge openjdk-* icedtea-* icedtea6-*

And then I installed the 7u79xx with gdebi, but instead I got the:

java version "1.7.0_121" OpenJDK Runtime Environment (IcedTea 2.6.8) (7u121-2.6.8-1ubuntu0.14.04.1) OpenJDK 64-Bit Server VM (build 24.121-b00, mixed mode)

Even when I manually removed the deb packages of 7u121xx version, I guess that aptitude looked up for newer versions and downloaded them. Anyhow, this didn't work either.

I read another article about it, but I don't have some files that requires java to run on /usr/bin (speaking of extracting the files from a *.tar.gz).

I'll try now to install the 7u79xx package without updating the package to the 7u121.

I appreciate it if someone can give me a hand on how to make this run. Thanks!.

Answer 1

Update:

Worked on my default FF 50.1.0 BUT, now it says:

setup failed please install 32 bit java and update...etc.

So, I got to this article : How to install Juniper VPN on Ubuntu 14.04 LTS?

-

I'm now using:

java version "1.7.0_79" Java(TM) SE Runtime Environment (build 1.7.0_79-b15) Java HotSpot(TM) 64-Bit Server VM (build 24.79-b02, mixed mode)

update-alternatives --config java

loading java from: 1 /opt/jdk/jre1.7.0_79/bin/java 100 manual

Then,

I realiaze that I didn't have a FF java plugin going trough a FF tab and -> about:plugins

-

So, after reading this: How to install the Java plugin for Firefox?

I did this:

apt-get install icedtea-7-plugin

The result (FF tab -> about:plugins) :

IcedTea-Web Plugin (using IcedTea-Web 1.5.3 (1.5.3-0ubuntu0.14.04.1))

File: IcedTeaPlugin.so
Path: /usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
Version: 
State: Enabled
The IcedTea-Web Plugin executes Java applets.

-

I'll try now the first article that I've mentioned on the beginning of this post and I'll post the results.

Answer 2

Well, the thing turned out to be that the juniper VPN client don't get along with 64 bits systems, so, there is a bunch of documentation, scripts, etc.

Such as: How to install Juniper VPN on Ubuntu 14.04 LTS?

http://mad-scientist.us/juniper.html

Juniper Network Connect not working on ubuntu 16.04

Since I was about to already reinstall my OS, I'll decide to go for a 32 bit OS, I'll use it only for work, so it's okay. I don't want to have plenty of both 32/64 versions of FF, JAVA, plugins, etc. Since I would had to do that in order to get this run properly.

Answer 3

To future readers, this worked that time on: 64 bits Xenial / FF 47 and 32 bits Xenial / FF 51, quite old now but could give you a hint on the how to:

Install specific java version:

apt-get install openjdk-7-jdk:i386

If you don't have the repos, do:

add-apt-repository ppa:openjdk-r/ppa  
apt-get update

Choose which java to use:

update-alternatives --config java

There are 3 choices for the alternative java (providing /usr/bin/java):

  Selection    Path                                            Priority   Status
------------------------------------------------------------
  0            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1081      auto mode
  1            /usr/lib/jvm/java-7-openjdk-amd64/jre/bin/java   1071      manual mode
* 2            /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java    1070      manual mode
  3            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1081      manual mode

*Noticed that I checked option 2: /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java

Install FF icedtea plugins:

apt-get install icedtea-plugin