Answer:
MailList.java is stored in the Data Base folder on hard drive then compiler do following functions.
Step-by-step explanation:
The program is stored in Database .Compiler goes through in locating and it is stored in the directory of file If it is not located compiler search the file.The file will be customer.java and compile it. This file create the Customer class.How ever when compiler searches for the Account classes it is also located in compiler.Compiler search it and then compile it .Then this file create Customer class.