1	
     2	public class Main {
     3		public static void main(String[] args) {
     4			Main main = new Main();
     5			main.setReadOnly(false);
     6			main.add(main);
     7		}
     8	
     9		private boolean readOnly;
    10		private int size = 0;
    11		private Object[] elements = new Object[1];
    12		public void add(Object element){
    13			if(readOnly){
    14				return;
    15			}
    16			if(atCapacity())
    17				grow();
    18			addElement(element);
    19		}
    20		private void addElement(Object element) {
    21			elements[size++] = elements;
    22		}
    23		private void grow() {
    24			Object[] newElements = new Object[elements.length+10];
    25			for(int i = 0;i < size; i++)
    26				newElements[i] = elements[i];
    27			elements = newElements;		
    28		}
    29		private boolean atCapacity() {
    30			int newSize = size  + 1;
    31			if(newSize > elements.length){		
    32				return true;
    33			} else {
    34				return false;
    35			}
    36		}
    37		public void setReadOnly(boolean readOnly) {
    38			this.readOnly = readOnly;
    39		}
    40	}