import java.util.Iterator;

class VaarArray<T> implements Iterable<T> {
	T [] arr;
    
    @SuppressWarnings("unchecked")
	public VaarArray(int strl) {
        arr = (T[]) new Object[strl]; 
	}

	//Finner ledig plass og setter inn. Hvis det er plass returneres true,
	//hvis det er fullt returneres false
	public boolean settInn(T elem) {
        for (int i = 0; i < arr.length; i++) {
            if (arr[i] == null) {
                arr[i] = elem;
                return true;
            }
        }
        return false;
    }

    //Returnerer true dersom det var mulig å fjerne, false ellers.
	public boolean fjernFraIndex(int i) {
        if (i < 0 || i >= arr.length) {
            return false;
        }
        if (arr[i] == null) return false;
        arr[i] = null;
        return true;
    }

    
    public Iterator<T> iterator() {
        return new ArrayIterator();
    }


    private class ArrayIterator implements Iterator<T> {
        int pos = 0;

        @Override
        public boolean hasNext() {
            return pos < arr.length;
        }

        @Override
        public T next() {
            T ut = arr[pos];
            pos++;
            return ut;
        }
    }

    public static void main(String[] args) {
        VaarArray<Integer> arr = new VaarArray(10);
        arr.settInn(1);
        arr.settInn(2);
        arr.settInn(3);
        arr.settInn(4);
        
        for (Integer i : arr) {
            System.out.println(i);
        }
    }
}