An array iterator : Iterator « Collections Data Structure « Java

An array iterator


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import java.util.Iterator;
import java.util.NoSuchElementException;

 * An array iterator.
 * @version <tt>$Revision: 2800 $</tt>
 * @author <a href="">Jason Dillon</a>
public class ArrayIterator implements Iterator, Serializable, Cloneable {
  /** The serialVersionUID */
  private static final long serialVersionUID = -6604583440222021075L;

  /** Array to iterate over. */
  protected final Object[] array;

  /** The current position in the array. */
  protected int index;

   * Construct an ArrayIterator.
   * @param array
   *          The array to iterate over.
  public ArrayIterator(final Object[] array) {
    this.array = array;

   * Returns true if there are more elements in the iteration.
   * @return True if there are more elements in the iteration.
  public boolean hasNext() {
    return index < array.length;

   * Returns the next element in the iteration.
   * @return The next element in the iteration.
   * @throws NoSuchElementException
   *           The are no more elements available.
  public Object next() {
    if (!hasNext())
      throw new NoSuchElementException();

    return array[index++];

   * Unsupported.
   * @throws UnsupportedOperationException
  public void remove() {
    throw new UnsupportedOperationException();

   * Returns a shallow cloned copy of this object.
   * @return A shallow cloned copy of this object.
  public Object clone() {
    try {
      return super.clone();
    } catch (CloneNotSupportedException e) {
      throw new InternalError();


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