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java.lang.NullPointerException at java.util.LinkedList.addAll(LinkedList.java:258) at java.util.LinkedList.addAll(LinkedList.java:238) at java.util.LinkedList.<init>(LinkedList.java:90) at com.compoze.calendar.AppointmentList.<init>(AppointmentList.java:51) at com.compoze.calendar.Appointments.appointments(Appointments.java:227) at com.compoze.calendar.Appointments.appointments(Appointments.java:177)