Wrong Java version shown in Help-About window
Thread poster: MikeTrans

MikeTrans
Germany
Local time: 03:58
Italian to German
+ ...
Jan 22, 2017

Hi,
I have downloaded and installed the newest Java x64 version. Before installing it I have deactivated several older 32-Bit versions in the Java Panel, only the x64 version is activated. I then have downloaded and installed the newest version of CafeTran by first deleting the old c:\CafeTran Espresso folder.
The Help > About window in CafeTran shows: "1.8.0_111, Java HotSpot(TM) Client VM", thus an old 32-Bit version. How is that, did I uninstall incorrectly the old version?

If I understand well, I should work with the latest x64 because it is much faster when handling TMs etc.

Thanks,
Mike


[Edited at 2017-01-22 18:20 GMT]


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esperantisto  Identity Verified
Local time: 05:58
Member (2006)
English to Russian
+ ...
Theory vs. reality Jan 23, 2017

Is your CafeTran build a 32-bit one or a 64-bit one? A 64-bit Java program simply will not run under a 32-bit JRE. A 32-bit program will run under a 64-bit JRE (provided, of course, that the host operating system is 64-bit too), but will hardly gain any productivity. Only running a 64-bit program under a 64-bit JRE may yield something as compared to a 32-bit program under a 32-bit JRE, but not necessarily something noticeable to a user.

For clean uninstalling of a JRE, try JavaRa.

[Edited at 2017-01-23 09:47 GMT]


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Igor Kmitowski  Identity Verified
Poland
Local time: 03:58
English to Polish
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Deactivate vs Uninstall Jan 23, 2017

Hi Mike,

It looks like your operating system still uses the 32-bit Java by default despite deactivating it. Uninstalling the 32-bit Java versions might help here. After that, you might need to install the 64-bit Java version again to set it as the active Java. To check which Java is active:

1. Type "Command prompt" in Windows Start > Search box.
2. Type "java -version" in the black Command prompt window and check.

Igor


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MikeTrans
Germany
Local time: 03:58
Italian to German
+ ...
TOPIC STARTER
I find out that my Javas are installed in different locations Jan 23, 2017

Hello Igor, esperantisto,
thank you both for your feedback.

@Igor,
When I enter java -version in the command prompt it tells me that Java x64 (which I have freshly installed) is used.

@esperantisto,
how do I find out if CafeTran is x32 or x64? The download file is named CafeTran-install.jar and the file Details do not tell this.

I notice that all my Java x32 are installed in Progamme (x86) folder, instead the new Java x64 is installed in "Programme" (the english equivalent of 'Program Files').
What I have done now is I have renamed the Java folder of Programme (86) in 'BACKUP_Java'. If I want now to open CafeTran, Windows asks me which executable to open CafeTran; the 'java.exe' from Java\Programme\jre1.8.0_121\bin does not open CafeTran, which one is it?

Thanks,
Mike

[Edited at 2017-01-23 16:58 GMT]

[Edited at 2017-01-23 17:09 GMT]


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MikeTrans
Germany
Local time: 03:58
Italian to German
+ ...
TOPIC STARTER
I'm going to remove all Javas and re-install the x64 only... Jan 23, 2017

... but I hope I don't have too many programs on my system that require some x32 ones, else I will have to re-install them and hope the above problem will not show-up again (that CafeTran will stay with the x64 Java.)

[EDIT]
It works, CT shows the correct Java on start. One of my programs uses to work with Java 6, but the current Java is backward-compatible. Problem solved.

Greetings,
Mike

[Edited at 2017-01-23 18:24 GMT]


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esperantisto  Identity Verified
Local time: 05:58
Member (2006)
English to Russian
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32 vs. 64 bit Jan 23, 2017

Normally, the download page should tell you if the program is 32- or 64-bit. When no such information, it is most probably 32-bit.

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TechStyle  Identity Verified
United Kingdom
Local time: 02:58
32 versus 64 bit Jan 23, 2017

esperantisto wrote:

Is your CafeTran build a 32-bit one or a 64-bit one? A 64-bit Java program simply will not run under a 32-bit JRE. A 32-bit program will run under a 64-bit JRE (provided, of course, that the host operating system is 64-bit too), but will hardly gain any productivity. Only running a 64-bit program under a 64-bit JRE may yield something as compared to a 32-bit program under a 32-bit JRE, but not necessarily something noticeable to a user.

For clean uninstalling of a JRE, try JavaRa.

[Edited at 2017-01-23 09:47 GMT]


That applies to most software, but not Java: with Java, you don't compile the software for any specific processor (like a 64 bit Intel one, or the 32 bit ARM in a lot of mobile devices) - it's all just "Java virtual machine", which gets translated as needed into whatever your system needs. That way, they can produce a single program for everyone, which will run on Macs, Intel PCs, ARM mobile devices and everything else unchanged. (That's the theory, anyway; of course, it doesn't always work properly in practice!)

In this case, CafeTran seems to come as a simple JAR (Java ARchive) file, which runs under whichever version of Java Windows "knows about" - in this case, that happened to be an old 32 bit version until Mike deleted that, after which reinstalling the current 64 bit one replaced it.


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