PhoneSearch Week 9, Exercise 26 "Adding address"

[josh...@gmail.com]

Hi,

I'm having problems with week 9 exercise 26  of  Java OOP Part 2 .

I'm currently having issues adding an address to a Person object. I currently have a HashMap holding the Person object as a key, and a HashSet to hold phone numbers. I'm getting a concurrent modification exception when I have more than one Person key in my HashMap.  I'm also having problems creating a new Person object when I attempt to add an address to a Person that does not exist in my HashMap.  Any hints would be much appreciated.

The link to my work is here : https://tmc.mooc.fi/mooc/paste/rnIbNT3fyxuomFozP7ftVQ

Best regards,

Josh