Create form and save it to database

Hey everyone, i would like to ask how to add new forms with input and save it to database and can be viewed.
thank you.

Have you studied existing code? You probably should do something similar.

I have, but my JAVA knowledge is still basic.

So do you want someone to write the code for you?

Can you help tell me where is the file that execute query?

Not really i just wanted to know where is the file that execute query

QueryBuilder.java

Thank you Anton ,
oh one more thing if that's okay with you,

I know TRACCAR use React JS Framework and i'am currently starting courses about React JS.

Can you recommend me what course or knowledge should i learn to fully understand TRACCAR.

I would much very appreciated it.

I think you should just read the official documentations for the frameworks we're using.