Difference between -D and -d environment variables in Java -


i understood how environment variables works in java, setting -dvariable , getting system.getproperty("variable"). i've seen examples "-d" variable using lowercase, , wonder what's difference between that? found no answer googling.. in advance

java -help prints:

-d= set system property

if invoked -d prints error messages:

unrecognized option: -d

another option starting d:

-dsa | -disablesystemassertions disable system assertions (this cannot used set variables).


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