Java has precedent for running on low-performing devices; see J2ME[0], which ran on a whole bunch of old mobile phones, and Java Card[1], which ran on smart cards.

https://en.wikipedia.org/wiki/Java_Platform,_Micro_Edition

https://en.wikipedia.org/wiki/Java_Card

there are some tiny jvms out there - uJ meant for microcontrollers gives a functional jvm in 60kb