ItorTest.java

import java.util.*;

class ItorTest {
    ArrayList<String> foo;
    public static void main (String [] args) {
	ArrayList<String> foo = new ArrayList<String>();
	foo.add("Hello");
	foo.add("World");

	for (Iterator<String> it = foo.iterator(); it.hasNext();) {
	    System.out.println(next(it));
	}
    }

    public static String next(Iterator<String> bar) throws NoSuchElementException {
	if (bar.hasNext()) {
	    return bar.next();
	} else {
	    throw new NoSuchElementException();
	}
    }
}