[SOLVED] why java -version

zousheng · 07-31-2013, 10:14 AM

Hi ,

Today just met this issue, running java -version | grep 1.6, this doesn't work as expected, just display all the information,
after running java -version >1.txt 2>2.txt ， found the outout is in 2.txt, the standard error output. Don't know how it works. please help

linosaurusroot · 07-31-2013, 10:24 AM

Code:

java -version 2>&1 | grep "1\.6"

Firerat · 07-31-2013, 10:27 AM

java is sending the 'info' to stderr,

if you want 'grep it', you need to redirect stderr to stdout

java -version 2>&1 | grep 1.6

zousheng · 07-31-2013, 07:10 PM

thanks.