How to write output of "java -version" to a text file?

Question

I am not able to write the output of java -version from a batch file to a text file using:

java -version>tmp.txt

However, the following works (that is, the data is written to the text file):

java>tmp.txt

aschipfl · Accepted Answer · 2016-09-21 15:06:13Z

8

The command line java -version returns the output data at the STDERR stream (rather than STDOUT). The redirection operator > uses the stream handle 1 by default, which is the STDOUT stream. To read from the STDERR stream, you need to state the respective handle 2 explicitly:

java -version 2>tmp.txt

The command line java behaves as expected, because it returns the output at STDOUT.

Reference this external resource for details: Redirection.

edited Sep 21, 2016 at 15:06

answered Sep 21, 2016 at 14:34

aschipfl

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1 Comment

aschipfl Over a year ago

You should refer to the documentation... basically, STDERR is intended to receive error messages (as the name denotes), all other data is usually written to STROUT; but it always depends on the "mood" of the developers...

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