/**
 * An interface for iterators over the chars in a
 * string.  It is expected that implementers will have a
 * constructor that takes a string parameter--the string
 * over which to iterate.
 */
public interface CharIterX {
  /**
   * Get the next char in the string.
   * @return the next char
   * @throws IteratorExhausted if there is no next char
   */
  public char next() throws IteratorExhausted; 
}