Avast WEBforum

Other => General Topics => Topic started by: fire on July 11, 2013, 12:31:06 AM

Title: Java Question
Post by: fire on July 11, 2013, 12:31:06 AM
I found out I have both the 32 and 64 bit versions of Java installed. Can this cause any problems. In my control panel it shows both versions but it doesn't say which is 32 and which is 64 in the event someone here says i should remove the 32 bit version. If having both isn't cause for concern then I won't do anything,,,thanks
Title: Re: Java Question
Post by: marc-d-l on July 11, 2013, 12:45:32 AM
You can always uninstale them both and reinstale 64 bits to make sure
Title: Re: Java Question
Post by: fire on July 11, 2013, 12:58:39 AM
Well the only reason I even discovered I had two different versions was when the avast updater notified me that an update was available. I must have had both versions for a long time and I'm not experiencing any problems. Didn't know if having both could cause any conflicts,,,btw I'm a computer novice with most things so I'm looking at this in that respect.
Title: Re: Java Question
Post by: DavidR on July 11, 2013, 01:32:45 AM
It rather depends on what browser you are using, there is a 32bit and 64bit version. Whilst you have a 64bit OS if you are using a 32bit browser version, I don't know if that would also mean you would have the 32bit JAVA version installed.

The current JAVA installer has both 32/64 bit versions in the installer, so I would have thought that it would install what is required.

Title: Re: Java Question
Post by: fire on July 11, 2013, 01:35:09 AM
Dave I have IE and I thought I read somewhere that IE reverts to the 32 bit version. Also it turned out that the 32 bit version was the one that needed updating,,,which I did.
Title: Re: Java Question
Post by: Gopher John on July 11, 2013, 02:01:54 AM
There are separate 32 and 64 bit Java Runtime Environment installers.  See http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html (http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html).  Adobe Flash installers include the 32 and 64 bit versions.

I have both installed Java 32 and 64 on my laptop.  The one needed is dependent on the software that is calling the Java function, not just the OS.
Title: Re: Java Question
Post by: fire on July 11, 2013, 02:04:51 AM
So then John I haven't experienced any problems so I guess I'll just leave things as they are.
Title: Re: Java Question
Post by: Gopher John on July 11, 2013, 02:09:41 AM
I do have Java disabled in the browsers via the Java Control Panel as I don't need it on the web, only on a program that I run locally.  This is to minimize security issues.
Title: Re: Java Question
Post by: DavidR on July 11, 2013, 03:46:36 AM
There are separate 32 and 64 bit Java Runtime Environment installers.  See http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html (http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html).  Adobe Flash installers include the 32 and 64 bit versions.

I have both installed Java 32 and 64 on my laptop.  The one needed is dependent on the software that is calling the Java function, not just the OS.

Thanks for that clarification, confusion reigns ;D

An exceptionally long time since I dumped JAVA.
Title: Re: Java Question
Post by: Gopher John on July 11, 2013, 01:43:46 PM
Kind of like computers; things no longer needed gets purged. ;)
Title: Re: Java Question
Post by: Para-Noid on July 11, 2013, 06:03:56 PM
If you don't absolutely need Java dump it since is has been known to be easily exploited.
I haven't had Java so long I can't remember when I uninstalled it once and for all.  :)
Title: Re: Java Question
Post by: SpeedyPC on July 11, 2013, 06:33:20 PM
If you absolutely need Java dump it since is has been known to be easily exploited.
I haven't had Java so long I can't remember when I uninstalled it once and for all.  :)

+1 I gave up Java since Windows 98 and I still don't use it and I still don't trust Java at all.
Title: Re: Java Question
Post by: wyrmrider on July 12, 2013, 12:59:15 AM
Thanks for the Tip Gopher IT john
I only use Java for one installed program
Title: Re: Java Question
Post by: fire on July 13, 2013, 12:15:32 AM
As I never installed Java that I know of can I just assume it was there from the get go.(don't know if it matters but i have windows 7) Can someone tell me the biggest reason Java is used for. It sounds like i don't even need it.
Title: Re: Java Question
Post by: iroc9555 on July 13, 2013, 01:03:22 AM
As I never installed Java that I know of can I just assume it was there from the get go.(don't know if it matters but i have windows 7) Can someone tell me the biggest reason Java is used for. It sounds like i don't even need it.

That is true. You may not even need it ever, but if you do; for a program, a website, or interaction, you will know. So You may remove it and try your programs and usual websites, your bank, etc without it. If everything seems to work like always, stay away from it.
Title: Re: Java Question
Post by: DavidR on July 13, 2013, 01:07:08 AM
As I never installed Java that I know of can I just assume it was there from the get go.(don't know if it matters but i have windows 7) Can someone tell me the biggest reason Java is used for. It sounds like i don't even need it.

No JAVA isn't part of the OS, someone had to have installed it. I don't believe it would come pre-installed on a new notebook, etc. as it is non-essential.

Some programs are JAVA based and require it, some websites use JAVA (not to be confused with JavaScript). So unless you have a program/s that require it or visit a website that requires it and you absolutely have to use them. Then JAVA isn't required and can be uninstalled.
Title: Re: Java Question
Post by: fire on July 13, 2013, 06:04:27 PM
If I uncheck the "enable java content in the browser" which is in the security tab of the java control panel,,,,would that surfice until I find out I don't need java for anything I use?
Title: Re: Java Question
Post by: CraigB on July 13, 2013, 06:17:40 PM
If I uncheck the "enable java content in the browser" which is in the security tab of the java control panel,,,,would that surfice until I find out I don't need java for anything I use?
It's a start :) its quite likely that if you don't know why its on the system or why you need it then it's is highly probable that you don't need it.

As you said you can disable Java content from the browser so test that for a few days and if there is no problems the next step is deleting Java all together and if you find out it is needed then it is a pretty simple process to re-install it :)
Title: Re: Java Question
Post by: fire on July 13, 2013, 06:28:00 PM
Craig thats what I plan on doing for a few days,,check most of my usual sites. Thanks for the reply.
Title: Re: Java Question
Post by: CraigB on July 13, 2013, 06:31:25 PM
No problem, with any luck you'll be Java free in a few days and a lot safer on the net :)
Title: Re: Java Question
Post by: Gopher John on July 13, 2013, 08:32:09 PM
Be sure to disable Java in the browsers for both 32 and 64 bit using the correct Java Control Panel.  http://www.java.com/en/download/help/disable_browser.xml (http://www.java.com/en/download/help/disable_browser.xml).  Since I only have one Java icon in Windows Control Panel, I navigated to the appropriate file as indicated in the above link.
Title: Re: Java Question
Post by: essexboy on July 13, 2013, 08:50:28 PM
Or use this for IE http://support.microsoft.com/kb/2751647
Title: Re: Java Question
Post by: Gopher John on July 13, 2013, 09:00:11 PM
Or use this for IE http://support.microsoft.com/kb/2751647

Am I correct in that this IE fix is not needed if Java is disabled in the browsers using the Java Control Panel?  I haven't opted to apply the fix-it yet.  Is it still necessary to apply this fix-it?
Title: Re: Java Question
Post by: essexboy on July 14, 2013, 12:08:30 AM
There is still a javascript element in IE even if Java is not installed

Quote
Java is a unique form of extensibility because it can be invoked in the following two ways:
•By using an applet element
•By using an object element that has a CLSID of a Java virtual machine (JVM)
These two invocation methods are subject to different security controls. This Knowledge Base Article contains a Fix it solution to disable the Java web plug-in from being loaded through these controls. The Fix it solution will also disable the Java Network Launching Protocol (JNLP) handler.
Title: Re: Java Question
Post by: Gopher John on July 14, 2013, 04:50:47 AM
There is still a javascript element in IE even if Java is not installed

Quote
Java is a unique form of extensibility because it can be invoked in the following two ways:
•By using an applet element
•By using an object element that has a CLSID of a Java virtual machine (JVM)
These two invocation methods are subject to different security controls. This Knowledge Base Article contains a Fix it solution to disable the Java web plug-in from being loaded through these controls. The Fix it solution will also disable the Java Network Launching Protocol (JNLP) handler.

There is a JavaScript element in all browsers.  The bigger question is whether Java can be exploited even when it is disabled in all browsers via the Java Control Panel.  Can ActiveX enable Java in IE somehow?  Can an applet element somehow call a Java function?  I realize that IE is closely integrated in the Windows OS.  That's why I don't use it for my normal browser.
Title: Re: Java Question
Post by: fire on July 15, 2013, 08:39:29 PM
I have one last question. If I uninstall java and I happen upon a site that requires java will I be prompted to install it, or will the site just not load.
Title: Re: Java Question
Post by: Gopher John on July 15, 2013, 10:52:26 PM
There usually is a notice about a missing plug-in.
Title: Re: Java Question
Post by: fire on July 16, 2013, 07:42:43 PM
Well I uninstalled Java and when I tried to load the forums to let you know it said I needed java to continue,,,,,,,,,,,,,,,,,,,,,only kidding,,now Java free,,have to see if anything else I use requires it but so far all seems OK. Thanks for everyones help
Title: Re: Java Question
Post by: CraigB on July 16, 2013, 08:52:53 PM
Good to see fire, welcome to the Java free club :)