JDK and JRE install on 64-bit Windows 7
When you have JRE already installed on your system supporting Java for your browsers, you may still want to have the full JDK of same or different version installed on the same system. Here are few quick details about JDK and JRE install on 64-bit Windows 7.
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· 64-bit OS, 32-bit Browsers:
Firefox 2, Firefox 3.0.x, Firefox 3.5.x,
or Firefox 3.6
· 64-bit OS, 64-bit Browsers:
IE 8
download JDK 6 Update 20 76.29 mb self-installing executable. Select JDK 6 Update 20 then your platform and choose Windows (or whatever your platform. Windows 7 64-bit, you will need both 64-bit JDK for the deskop and a 32-bit JRE for 32-bit browsers.) If both browsers don’t show up in the Java control panel, manually add the missing one. If you have a 64-bit browser, you can run your Applets and Webstart in 64-bit too. All the common Windows browsers are still 32-bit.
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I have a Windows 7 64 bit machine with JRE 32 bit under Program Files (x86) and JRE 64 bit under Program Files.
I have an application which runs on 32 bit access some files from SysWOW64 but when I run the application, it gives me an error stating that file cannot be found, which proves that it is not looking it under SysWOW64. I tested the same application on another 64bit Windows 7 having only JRE under Program Files (x86) where it is working fine. To replicate the issue I myself installed 64bit JRE on that machine and I experienced the same issue.
When I ran the application from command prompt with explicit pointing of JRE like “C:Program Files (x86)javajre6binjava” -jar XXXX.jar
The application ran fine, so I think multiple JRE installation must have messed up with my java settings.
I would appreciate your help in configuring my machine so as to use correct version of JRE.
That’s because whichever version you install lately will override the Java specific Java_Home and/or path enviornment variables. Take a look at http://gunnalag.wordpress.com/2011/03/30/why-do-you-need-java_home-environment-variable/ and ensure you have proper setings in-place. If that suggestion doesn’t work, try installing 32-bit JRE on a system that is already having JRE 64-bit and let me know how it goes.