How to output java -jar errors to a text/log file?

Question

i have googled my heart out! I am trying to figure out how to output any errors a java class might give when executing java from the Windows command line.

For insta

Answer 1

Use:

java -jar class.jar <someFile.file> 2>> log.txt

The 2 redirects the error stream.

Answer 2

or you can use bat file to easily direct all output to a text file in command prompt

C:> something.bat > console_output.txt