sorte

public static <E extends Comparable<E>> Collection<E> sortList (Collection<E> list) {

		if (list.isEmpty())
			return null;

		if (list.size() == 1)
			return list;

		Iterator<E> itr = (Itr<E>) list.iterator();
		ArrayList<E> arrayList = new ArrayList<>();
		E temp;

		while(itr.hasNext()) {
			arrayList.add(itr.next());
		}

		list.clear();

		// Bubble Sort

		for (int i = 0; i < arrayList.size() - 1; i++)
			for (int j = 0; j < arrayList.size() - 1 - i; j++) {
				if (arrayList.get(j).compareTo(arrayList.get(j+1)) > 0) {
					temp = arrayList.get(j);
					arrayList.set(j, arrayList.get(j+1));
					arrayList.set(j+1, temp);
				}
			}

		list.addAll(arrayList);

		return list;
	}