I am afraid that J series phones will not get Android 10 update as a few months ago, Samsung announced that the J series has been discontinued by quoting, "A is the new J", where A is A series and J is J series. Please someone correct me if i am wrong but according to me, I think that no J series phone will have android 10 update. At least there will not be any official update but i believe you can flash android 10 using a pc or computer. EDIT: I am so sorry. Apperently, J6 and J6+ are getting android 10 update in June 2020 and July 2020 respectively. so there is some hope that J8 will get it too.