public boolean equals(Object o) {
Employee e = (Employee) o;
Map<String, PhoneNumber> map = e.getPhoneNumbers();
if (map.size() != phones.size()) return false;
Collection<Map.Entry<String, PhoneNumber>> entries =
(Collection<Map.Entry<String, PhoneNumber>>) phones.entrySet();
for (Map.Entry<String, PhoneNumber> entry : entries) {
String key = entry.getKey();
PhoneNumber p = entry.getValue();
PhoneNumber p0 = map.get(key);
if (p.getNumber() != p0.getNumber()) return false;
}
return true;
}
