Upload error to maple STM32 arduino framework

Hi! Thanks in advance for reading this. So after frustratingly figuring out the compile and upload buttons dont work on the current release with win10, I tried running these commands from the console. Simple blink sketch compiles without worries, but upload throws this error. Any ideas? I have JRE 8 latest version installed:

‘java’ is not recognized as an internal or external command,
operable program or batch file.
*** [upload] Error 1
Thanks again!