check if command was successful in a batch file

Question

How within a batch file to check if command

start \"\" javaw -jar %~p0/example.jar

was successful or produced an error?

I want to u

Answer 1

Most commands/programs return a 0 on success and some other value, called errorlevel, to signal an error.

You can check for this in you batch for example by:

call 
if %ERRORLEVEL% == 0 goto :next
echo "Errors encountered during execution.  Exited with status: %errorlevel%"
goto :endofscript

:next
echo "Doing the next thing"

:endofscript
echo "Script complete"