Java

I am trying to implements 2 Arraylist methods as recursive versions of them.

private E[] data; 

/**** assume eveything else is implemented

----- indexOf -----

@Override public int indexOf(Object target) { return indexOf(data,target); } private int indexOf(E[] data,Object target){ return 0; } 

----- contains-----

@Override public boolean contains(Object target) { boolean found = false;  return contains(data,target); } private boolean contains(E data, Object target){ int tracker = 0; if (target == null){ return false; } else if (!target.equals(data)){ return false; }else   return contains(data,target); }