// Overriding the compare method to sort the dueDate
public int compare(Task t1, Task t2) {
int result = 1;
Date d1 = t1.getDueDate();
Date d2 = t2.getDueDate();
if (d1 != null & d2 != null) {
result = t1.getDueDate().compareTo(t2.getDueDate());
} else if (d1 == null) {
result = -1;
}
return result;
}
// Overriding the compareTo method
public int compareTo(Task t) {
return (this.getName()).compareTo(t.getName());
}