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I need to output some information regarding the java.exe verison to a text file. The command prompt command 

C:\Windows\System32\Java.exe > C:\Users|txt.txt outputs everything to the correct file.

When I try to add the -version

C:\Windows\System32\Java.exe -version > C:\Users|txt.txt, the output text file remains blank.

Is there a way to get this into a txt file?

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2 Answers 2

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25

Use this command line instead:

C:\Windows\System32\Java.exe -version 2> C:\Users\txt.txt

(note the additional 2.)

Java is writing the version information to standard error (channel 2) rather than standard output.

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2 Comments

why is that? I mean why the output goes to standard error rather than standard output???
@opensas: I don't know, but if I had to guess I'd say that stdout is reserved for the Java program itself, so anything from the runtime rather than the program goes to stderr.
3

The command "java -version" prints its outputs into the standard error. So, you can redirect those outputs using "2>".

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