0 
os.system('java') or os.system('java -jar ...')

returns 

'java' is not recognized as an internal or external command, operable program or batch file.

However, when I call "java" from command line, it works perfectly fine. The directory with java.exe is in my path. os.system('C:\Windows\System32\java.exe') also does not work. Also, os.system('find') or os.system('ftp') also work, even though they are also exe's in System32.

Rob Volgman
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asked Jul 25, 2012 at 20:03
3
  • 1
    Try os.system('C:\\Windows\\System32\\java.exe') Commented Jul 25, 2012 at 20:08
  • ikz - please learn about formatting your posts. They will be much more readable. Commented Jul 25, 2012 at 20:38
  • 1
    I tried os.system ('C:\\Windows\\System32\\java.exe') and os.system('C:/Windows/System32/java.exe') etc. and they resulted in the same error. Interestingly, I tried adding the openjdk/jre directory to the PATH and apparently that worked. I still don't understand why the executable there should work when the system32 one doesn't. Commented Jul 25, 2012 at 22:56

1 Answer 1

2

This is because python doesn't have the same paths as your regular command line. You might be having a problem with escape characters - try using forward slash instead of backslash, or using a raw string. os.system('C:/Windows/System32/java.exe')

answered Jul 25, 2012 at 20:22
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