Java doesn't always work

schachwizard · 10-24-2010, 11:14 AM

I believe I've installed all the multimedia plugins I need, but Java doesn't seem to work well.

For example, at:
http://www.ludochess.com/jester_eng/jester_eng.html
The java applet does not load, in either Firefox or Chromium. It sometimes crashes the page. I've tried refreshing, but it doesn't help.

However, at other pages, like:
http://home.kpn.nl/fredvonk/rushhour.htm
Java works. Still, I sometimes have to refresh the page in order for the applet to load.

Because Java works on one page, I think I have the right plugins, but I can't figure out why it doesn't work on the other pages.

BTW, these pages work in Windows, so I know that the java applets DO work.

hairysocks · 10-25-2010, 04:57 AM

Do you get any messages in the Java Console - such as OutOfMemory?

schachwizard · 10-26-2010, 03:39 PM

No, I get no messages, as far as I can see.

MensaWater · 10-26-2010, 03:54 PM

Are you sure you're linking the right library?

Have a look at this:
http://www.linuxquestions.org/questi...-3-6-x-825409/

tommcd · 10-27-2010, 12:53 AM

schachwizard,
Hello from Philly!!
For the Sun java package and plugin for Firefox, make sure you have installed sun-java6-jre and sun-java6-plugin from the Ubuntu repos.
If you type about

lugins in Firefox (that is, about, then a colon, and then plugins, with no spaces in between) it should list what java plugin you are using.

schachwizard · 10-27-2010, 03:50 PM

I did not have either of those packages installed. (I thought ubuntu-restricted-extras would have taken care of that)

However, the second link still does not work.

tommcd · 10-28-2010, 01:31 AM

Those links work for me. Did you install the sun-java6-jre and sun-java6-plugin packages? Does about

lugins in Firefox list java as one of your plugins? You should see something like this:

Code:

Java(TM) Plug-in 1.6.0_22

    File: libnpjp2.so
    Version: 
    The next generation Java plug-in for Mozilla browsers.

This is followed by a whole lot of java stuff. Do you have this in about

lugins?

I think the ubuntu-restricted-extras may install the icedtea6 open source java package. If you have the icedtea6-plugin installed, or any other icedtea6 package installed, remove them and then restart Firefox. The icedtea6-plugin may conflict with the sun-java6-plugin package.

Kenny_Strawn · 10-28-2010, 01:47 AM

Actually, it installs openjdk-6-* (as in all the openjdk-6 packages). Those replace the 'sun-java' packages (the names changed after Sun was purchased by Oracle). As such, it should have worked. But if not, try this (in case it did install icedtea):

Code:

sudo apt-get install openjdk* && sudo apt-get purge icedtea*

tommcd · 10-28-2010, 02:09 AM

Quote:

Originally Posted by Kenny_Strawn

Actually, it installs openjdk-6-* (as in all the openjdk-6 packages). Those replace the 'sun-java' packages (the names changed after Sun was purchased by Oracle). As such, it should have worked. But if not, try this (in case it did install icedtea):

Thanks for mentioning that. I knew the ubuntu-restricted-extras installed something else besides the sun-java packages, but I could not remember what.
The sun-java packages are still in the Ubuntu repos. I have them installed; and I do not have any openjdk-6 packages installed.
The sun-java packages are still listed at ubuntuguide.org also:
http://ubuntuguide.org/wiki/Ubuntu:M...irefox_plug-in

schachwizard · 10-28-2010, 07:37 PM

Tommcd,

I removed the icedtea6 packages, and suddenly everything worked!

Thank you very much!

tommcd · 10-29-2010, 12:13 AM

Quote:

Originally Posted by schachwizard

I removed the icedtea6 packages, and suddenly everything worked!

So it was the icedtea6-plugin that was causing the problem then.
Glad I could be of help.

philipm · 01-01-2011, 08:57 AM

I seem to have a similar problem with clashed versions of Java, but I'm not exactly sure what to do:

If I search for IcedTea in Synaptic, I actually get a load of openjdk packages displayed: The description says they are from the IcedTea build! So, I'm not sure what to remove and what to install, since openjdk and icedtea seem to be the same thing.

Also, these openjdk packages have "!" marks next to them in the S column - I'm not sure what this means, since there isn't any help when I hover over the icon.

So, can somebody tell me which packages I need to install - and which I should definitely remove - in order to be able to use Java applets from Firefox? The Sun Java packages seem to no longer be available. I'm using Ubuntu 10.04

tommcd · 01-01-2011, 05:21 PM

Quote:

Originally Posted by philipm

I seem to have a similar problem with clashed versions of Java, but I'm not exactly sure what to do:

So, can somebody tell me which packages I need to install - and which I should definitely remove - in order to be able to use Java applets from Firefox? The Sun Java packages seem to no longer be available. I'm using Ubuntu 10.04

Just remove any icedtea* and openjdk* packages and install sun-java6-jre and sun-java6-plugin. Then restart Firefox and you should be good.
I have no idedtea* or openjdk* packages on my system and java works fine with the sun-java packages.
You may need to enable the Partner repository under software sources in synaptic in order to get the sun-java packages.