How is my java recursive descent calculator

Question

https://code.sololearn.com/cpIYrBqPs6ur/?ref=app
All feedback is greatly appreciated

Answer 1

Unless you have a coding question this is off-topic. You can advertise your code in the relevant thread. Please also make yourself familiar with forum rules.
https://www.sololearn.com/Content-Creation-Guidelines/
https://code.sololearn.com/Wv5gTHy1N6Ji/?ref=app
https://www.sololearn.com/discuss/1316935/?ref=app
https://www.sololearn.com/discuss/475577/?ref=app