Fwd: Fwd: java -version different on Win vs Cygwin (original) (raw)

Pete Brunet peter.brunet at oracle.com
Thu Mar 22 15:09:46 UTC 2012

Should the 64 bit Win installer also install the 32 bit program? If not it would be good to put a warning on download page.

-------- Original Message -------- Subject: Fwd: java -version different on Win vs Cygwin Date: Thu, 22 Mar 2012 09:49:43 -0500 From: Pete Brunet <peter.brunet at oracle.com> Reply-To: peter.brunet at oracle.com To: build-dev <build-dev at openjdk.java.net>

I think I found the answer here: http://www.curlybrace.com/words/2010/12/17/console-and-cygwin-dont-show-all-files-on-64-bit-windows/

Quote: This is because Cygwin bash and Console are 32-bit applications, and I'm running 64-bit Windows. With filesystem virtualization on Windows, when a 32-bit process attempts to access %SYSTEMROOT%\System32, it is redirected to %SYSTEMROOT%\SYSWOW64. Ironically named, System32 contains 64-bit applications, while SYSWOW64 contains 32-bit applications.

These give the same version: Win 7 DOS prompt: \Windows\SysWOW64\java -version Cygwin prompt: /cygdrive/c/Windows/System32/java -version

-------- Original Message -------- Subject: java -version different on Win vs Cygwin Date: Thu, 22 Mar 2012 09:30:45 -0500 From: Pete Brunet <peter.brunet at oracle.com> Reply-To: peter.brunet at oracle.com To: build-dev <build-dev at openjdk.java.net>

I get different versions when I do the following. Why?

Win 7 DOS prompt: \Windows\System32\java -version Cygwin prompt: /cygdrive/c/Windows/System32/java -version

Is that java.exe a stub that routes to a different java.exe? How do I control which java is activated?

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