Bash script store command output into variable

by 
 version=$(java -version 2>&1)

The version param only takes one dash, and if you redirect stderr, which is, where the message is written to, you’ll get the desired result.

As a sidenote, using two dashes is an inofficial standard on Unix like systems, but since Java tries to be almost identical over different platforms, it violates the Unix/Linux-expectations and behaves the same in this regard as on windows, and as I suspect, on Mac OS.

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