Im using java language, i have a project from my teacher th

I’m using java language, i have a project from my teacher the question is how do i write codes like that’Type a phone number, type of event is declared with constant integer to differentiateone species with another species. Use basic numbering prefix different constants betweentypes of phone numbers and event (eg, a phone number prefixed digit 1, the type of event preceded digit 2, etc.).’Sorry for my bad english.