class foo  {
static <T> void fromArrayToCollection(T[] a, Collection<T> c) { 
   for (T o : a) { 
	   c.add(o);
	   }
   }
void demo() {
	String[] sa = new String[100];
	Collection<String> cs = new ArrayList<String>();
	fromArrayToCollection(sa, cs);// T inferred to be String
	Integer[] ia = new Integer[100];
	Collection<Number> cn = new ArrayList<Number>();
	fromArrayToCollection(ia, cn);// T inferred to be Number
	}
}