public static Object[] getAlleJaren(){
		ArrayList<Integer> jaren = new ArrayList<Integer>();
		for(Weekplanning w:alleWeekplanningen){
			boolean found = false;
			for(Integer i:jaren){
				if(w.getJaar() == i){
					found = true;
				}
			}
			if(!found){
				jaren.add(w.getJaar());
			}
		}
		Object[] result = new Object[jaren.size()];
		for(int j = 0; j < result.length;j++){
			result[j] = "" + jaren.get(result.length - j -1);		
		}
		return result;
	}