32 bit Java VM

I am learning Java using Eclipse.
When I run the SWT tutorial I get a message saying "Can't load 32 bit libraries into a 64 bit VM". I can't seem to find a 32 bit copy.
Does Apple support a 32 bit VM?

Set the 32-bit VM by running Applications>Utilities>JavaPreferences.

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HT5367 How can I tell if I have 64 bit Java installed on my mac? I have something like Minecraft on it and I want to install 64 bit java on my mac. PLEASE HELP! Thanks!

I just need a bit help on how to install 64 bit java, i searched on youtube for it but it came up with many that I don't know much about. Please recommend a video you guys trust or know about. thanks

You can use 3rd party software such as Carbon Copy Cloner or SuperDuper! to create a bootable clone on an external drive.
I use SuperDuper to create a clone. Yes, it's true the Recovery HD will need to be recreated after restoring a clone because neither of these softwares nor Time Machine backup that partition. It's really no big deal. You just reinstall Lion on top of itself after the restore and reapply any Software Updates including the 10.7.1 update. I've done this a few times with no issues.
The Lion Recovery Assistant app creates an external Recovery HD on like a USB thumb drive, but it creates this using the Recovery HD from your Lion install. If the Recovery HD is missing, the app will not create one for you.
EDITED:
Create your bootable clone on an external drive.
Create an external USB thumb drive with the Recovery HD using the Lion Recovery Assistant.
Swap out hard drives.
Boot from the USB Recovery HD thumb drive.
Use Disk Utilities to create a new partition (Macintosh HD), format it with the GUID partition table and Mac OS Extended (Journaled).
While in Disk Utilities, click your hard drive (not the new partition); then click the Restore button.
The Source of your restore is the external clone you created. The Destination is the newly created Macintosh HD partition.
Click the Restore button. The restore will take awhile depending on the size of the clone.
After the restore, boot your system and it should boot into Lion.
Reinstall Lion on top of itself to recreate the Recovery HD at the end of your Lion partition.
Reapply Software Updates including the 10.7.1 update (if you want it).
Hope this helps!

SetDiagnosticDirectory(Diagnostics.java:54) [32-bit java on 64-bit machine]

On 64-bit LucidLynx Linux, If I run Oracle SQL Developer using 64 bit java, all is fine.
If I use 32-bit java, it doesn't start up and I get this fatal error:
java.lang.IllegalArgumentException: Cannot create <pwd>/?/.sqldeveloper/system1.5.5.59.69/o.ide/diagnostics
at oracle.javatools.logging.Diagnostics.setDiagnosticDirectory(Diagnostics.java:54)
at oracle.ide.IdeCore.startupImpl(IdeCore.java:1293)
<pwd> represents the current directory that I am in. That question mark appears as is.
If I run this as `sudo`, it works, cause it gets past the "permissions" problem. (but that's a red herring).
It should be trying to create the ".sqldeveloper/..." directory under my home directory, not in the present
working directory, and certainly not with a question mark as another directory name.
It appears that when using the 32 bit java (on a 64 bit machine), that whatever function
Oracle is using/spawning to determine the user and its
home directory, is failing, and the code just says, plop the diagnostics directory right here.
How does one debug this?
(I tried running `jdb` but setting break points doesn't seem to have an effect)
( Aside: on a 32-bit LucidLynx Linux machine, using 32-bit java, SQL Developer works fine.
I have all the necessary 32-bit libs, as we use 32-bit Java on 64 bit machines for other apps as well.)

I'm pretty new to java and this is the first
first time i'm making a post here. I want to know, if
i write a java program in a 32 bit environment will
the same code work in a 64 bit Environment too. Does
java abstract the architecture too?Only if there's a JVM available for the target environment.
Note for example that Sun supports 64 bit AMD processors but not Intel. But when they do your Java code will work without changes.

OPSC 12cR1 Install Error:no compatible version of 64-Bit java runtime exist

The Full error msg from the 12cR1 installer script:
Using Solaris sparc_64 Binaries
localhost is alive
warning: Jvm: System has greater version of 32-Bit java runtime (1.7.0_05) than
the bundled version (1.7.0_02). However, no compatible version of
64-Bit java runtime exists on the system. You can either choose to
continue, in which case, the 64-bit support on the Enterprise
Controller will be disabled or manually install the 64-Bit java runtime
(1.7.0_05) and try again.
Number of precheck info messages: 0, number of warnings: 1, number of errors: 0
I saw that the 11g installer script had the same problem last year. Why is this still a problem? How do I work around it?? The prior 11g workarounds did not work for me.
My JAVA versions, both 32&64bit, are there:
#java -d32 -version ; java -d64 -version
java version "1.7.0_05"
Java(TM) SE Runtime Environment (build 1.7.0_05-b06)
Java HotSpot(TM) Server VM (build 23.1-b03, mixed mode)
java version "1.7.0_05"
Java(TM) SE Runtime Environment (build 1.7.0_05-b06)
Java HotSpot(TM) 64-Bit Server VM (build 23.1-b03, mixed mode
Any help would be greatly appreciated. Thanks!!

Ops Center bundles the Java runtime in the installation but it will not install it if there's a newer version already installed.
In your case, you only have 32 bits version installed which is newer, so Ops Center cannot continue as you cannot install a lower version of the 64 bits.
This will tell you the 32 bits version:
# pkgparam SUNWj7rt VERSION
You're probably missing the SUNWj7rtx - which is the 64 bit version.
This will probably give you an error (this will check the 64-bit java version):
# pkgparam SUNWj7rtx VERSION
To see if you have it installed:
# pkginfo | grep SUNWj7rtx
To resolve this, you should install the same version in 64 bits (SUNWj7rtx) and then try the Ops Center installation again.

Using 64-bit java on Solaris 10 x86

Hello,
I just got a new X2100 server and installed Solaris 10 on it. Everything's running fine and I installed the most recent x86 64-bit jdk 1.5 update on it. However, I can't find any detailed info on how to set the amd64 java binaries and env as the default.
I had to manually prepend /usr/java/bin/amd64 to my path in order to get the 64-bit jvm to be recognized. And it does - when I type java -version it shows that it's the 64-bit server jvm. But, when I try to configure Resin 3.0.14, the configure output specifcally says there is no 64-bit java detected.
So there's gotta be something I'm not doing right. Any help or suggestions would be greatly appreciated.
Thanks,
-jason

On the x86 solaris 10 system I'm looking at there is
a client VM
/bin/java -client -version
java version "1.5.0_12"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_12-b04)
Java HotSpot(TM) Client VM (build 1.5.0_12-b04, mixed mode)
and a server VM
/bin/java -server -version
java version "1.5.0_12"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_12-b04)
Java HotSpot(TM) Server VM (build 1.5.0_12-b04, mixed mode)
For the client the 64bit VM is still in development. I don't
think there are dates established for that yet.
If you can use the server VM, then you need to down
load the 64bit binaries. Then you will see
/bin/java -server -d64 -version
java version "1.5.0_12"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_12-b04)
Java HotSpot(TM) 64-Bit Server VM (build 1.5.0_12-b04, mixed mode)
The downloads are at (look for the release you want)
http://java.sun.com/javase/downloads/index.jsp
Hope that helps.

Is it possible to use 32-bit firefox with 64-bit java plugin?

Is it possible to use 32-bit firefox with 64-bit java plugin?
I'd like to use 32-bit firefox and I already install 64-bit java plugin.
Is that a right choice not to install 32-bit java plugin?
Will these cause problem?
Thanks in advance.
Regards,
Sean

Nope - you need the 32bit Java to go with the 32bit Firefox if you want Java to run

32 bit Java rather than 64??

I used to be able to deposit my checks online with my PC. Hooked up seemlessly with my Epson printer. My Mac is asking for a 32 bit Java applet rather than the 64 bit. Apparently the bank system is designed for 32 bit only. It didn't make any difference with the PC (using XP Prof). Now I'm stumped. How or can I select 32 rather than 64? I'm kind of clueless when it comes to these kinds of things.

Try changing the priority order within the Java Preference application. Try these steps:
1) Do a spotlight search for "Java" "Java Preferences" should show up. (to do a spotlight search, hold the command key and then click spacebar.
2) Open the Java Preferences app.
3) Drag the 32 bit Java SE to the top above the 64 bit version.
Not sure if you'll have to re-start apps, or re-boot, but this may get you back up. Good luck.
Don

32 bit java

I am running ubuntu on an AMD 64 bit system. I have installed firefox as part of the distribution. I need to run a 32-bit java app with the 32-bit jre plugin. When I install the 32-bit jre plugin per http://www.oracle.com/technetwork/java/javase/manual-plugin-install-linux-136395.html the java plugin is not found (I don't see it listed in the Add-ons Manager and http://www.java.com/en/download/installed.jsp cannot verify it) however when I install the 64-bit jre the plugin is found and works correctly. Is there a way to install the 32-bit jre plugin given my current sysem configuration?
Thanks

Hello,
Any specific reason why you need to run this application on a 32-bit JRE only. The 64-bit JRE will be able to run the applet / JWS application that you are trying to run.
Also, does this applet / application have any specific dependency on the Sun JRE? Can you not use the IcedTea plugin for this?
Thank you

32 Bit Java Just Won't Work

I need to install both 32 bit and 64 bit java on my computer to run a variety of different applications. 64 bit installed perfectly, but 32 bit just won't. I get the message:
ERROR: Could not create java virtual machine.
ERROR: A fatal exception occurred. The program will exit.
What do I do to fix it?

I'm having the same problem. I'm on a 1st Gen (June 2006) MacBook. I'm completely up to date on Software Update, but I can't get Java applets to display in any browser. I've checked Java Preferences, and I know that Java is installed on my computer. What gives?

32-bit Java error with Navy Federal Credit Union eScan Deposit

I am trying to do eScan Deposit. The first time it said it needed to download a Java applet, and I said yes, after the download was complete it still did not recognize the scanner. It gave me an error saying "This system does not support 64-Bit Java. Select 32-Bit Java". I verified with Apple Support that both 32 and 64-bit Java come with snow leeopard and the Java Prefs were correct. Could this be the printer, or is this a Navy Federal web site issue? Anyone know how to fix the problem? Thanks in advance.

The browser does not allow created files to be uploaded, it wants to manage that process. This worked fine for my windows latop, but I had the full HP driver installed. HP has not made one availabile yet for 10.7.2 and recommeds using the Apple drivers. I can do that fine for printing and scanning (with the Image software). But not with the application. The Credit Union sais it "should work with MAC" provided I have the right printer driver and TWAIN compliant scanner. The HP 7780is TWAIN compliant. HP recommended gong to www.twain.org and downloading TWAIN s/w for MACs. I started to, but the s/w was dated 2002 and won't help for newer MAC operating systems.

Possible/supported to use portal 7.1 with 64 bit java?

Hi!
Our portal machines in productive environment have 16 GB ram and I would like to use them. But 32 bit java does not support this. (Linux platform)
So, the simple question is:
Can I install a 64 bit JDK (e.g. 50 Update 12) and run portal with it?
1) Does it work?
2) Is it supported?
Please note that I have no pressing urge to upgrade at the moment, 3GB heap seem to be sufficient for now but I just want to know. Also if there are future plans to allow this...
Thanks, Chris

Hello Martin,
The E-commerce 5.0 guide for ERP, says that the minimum version supported is 4.6C with the specific patch level version. We had issues initially with the TREX 7.0 installation on 64 bit windows ( lot of modifications have to be done manually here).
But now TREX 7.0 is working fine and i can see the replication happeing from R/3 4.6C. We are configuring the webshops and doing all the XCM settings currently so, would be able to tell in a days time, if it works for us or not.(with 4.6C).
Thanks,
Dipender Singh

64-bit firefox on ubuntu 11.04 crashes trying to run 32-bit java applet, should this be possible?

on 64-bit Ubuntu installation I need to be able to run a 32-bit java applet within browser. If this is possible, how? With icedtea6 plugin (for 64-bit jre) firefox crashes when applet first starts to run.
11.0+build1-0ubuntu0.11.04.1

Hi,
You can try to install the Oracle Java via the Ubuntu Software Manager/Update Manager/PackageKit/Package Manager, if it is an option. Please note that you may have to temporarily disable the IcedTea plugin in '''Tools '''('''Alt '''+ '''T''') > '''Add-ons''' > '''Plugins '''to prevent conflicts when playing Java content in Firefox. Posting in the [http://ubuntuforums.org/ Ubuntu forums] would also be very helpful.

64 Bit Java is slower than 32 Bit.

I was running a Linux 64 JDK 1.5 JVM, and doing large software builds.
The ant builds, which would involve some file operations and come javac compiling took about 6:30 to complete. After changing my JVM to the 32 bit version they completed in 4:15.
Is the 64 bit Java support really so bad?

That wasn't the case here tho', no EXS instances at all in this project.
I tried clearing some caches and that seemd tp make it worse, so that when opening in 64bit, Logic would hang and say: Searching for Audio Unit plug-ins (Apple: AUNet Receive). Then eventually it would load.
But none of this would happen in 32bit mode, just a normal load, very fast.
So I reinstalled Logic update 9.1.7 and that seemed to sort it out, at least I'm back to where Logic loads slowly in 64bit mode, without any "Searching for ..." messages.
Any more guidance appreciated.

How do you switch between 64-bit and 32-bit Java configuration?

I've downloaded the latest Java plug-in for an online service, but when I go to run the service on Safari or Firefox browsers, I get a message that 32-bit Java is needed and my machine is running 64-bit. How do you switch back and forth?

Similar concern here. No 64 bit version. I purchased the Photoshop CS5 downloadable upgrade. I have installed the program but only see the 32 bit version. Image / Mode shows 8, 16 and 32 bit versions and no 64 bit.
Start Programs offers only a single version of Photoshop which based on the splash screen is 32 bits. Did I miss something during the install?
Bob

Latest 32-bit Java 7 compiled with /LARGEADDRESSAWARE?

While searching around, I didn't have a whole lot of success getting a clear answer, thus I appeal to this forum...
A customer of ours wants to continue using the 32-bit Java 7 VM on 64-bit Windows 2008, but would like to use as large a heap as possible. Has the Windows 32-bit Java 7 VM been compiled with /LARGEADDRESSAWARE? Is there any documentation about this?
Thanks,
-- Jim C

The 32-bit JVM for Windows is not compiled with LARGEADDRESSAWARE, and based upon recent space optimizations with Java 7, is likely not to be anytime soon. In the past, some avoided the 64-bit JVM if they didn't need the extra heap space because it incurred significant memory overhead. That is not necessarily the case now. In fact Oracle recommends using the 64-bit JVM even if your heap requirements don't exceed 4GB. Why?
1. The 64-bit JVM will automatically use 32-bit references on the heap when its size is below 4GB. The command-line switch -XX:+|-UseCompressedOops, available in Java 7, enables/disables this mode and by default is on. Not all internal pointers will be 32-bit, but nonetheless your application running in 64-bit mode should be much smaller than previous 64-bit versions. For a technical description, check out this article:
https://wikis.oracle.com/display/HotSpotInternals/CompressedOops
2. The 64-bit JVM has access to more registers and hence more opportunities for performance optimizations. This helps generate faster code.

Applets load very slowly on 64bit Windows 7 using 64 bit Java

Hi
We have an applet that was very quick to load under windows XP. Some of our users are now using the 64 bit Windows 7 Operating system with 64 bit Java runtime environment and this applet takes up to 20 seconds to load.
These machines have both the 32 bit and the 64 bit versions of Java loaded. JAVA_HOME is set to C:\Program Files (x86)\Java\jdk1.6.0_26 and the PATH has %JAVA_HOME%\bin;%JAVA_HOME%\jre\bin; at the start.
I noticed on Windows XP that there was a Java Quick Starter service which is not present in Windows 7. I assume Windows 7 has it's own optimised java loader (which obviously insn't working) as the Control Panel -> Java -> Advanced -> Miscellaneos -> Java Quick Starter is greyed out.
I've noticed that jqs.exe does not exist in the bin directory, and there is no C:\Program Files\Java\jre6\lib\deploy\jqs directory.
So the bottom line is...How do I get my applet to load faster in 64 bit environments?
Thank you in anticipation
Richard

JQS could not explain 20s startup. This must be something related to network - either config issue (e.g. DNS timeouts) or too many nework connections on launch?
Enable tracing and java console, add
deployment.trace.level=all
to deployment.properties and see what is happening and where applet seem to stuck.
Compare to 32 bit case.

32 bit Java VM

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