/**
 * Exception thrown by Queue methods front and dequeue when the queue is
 * empty.
 * 
 * @version     1.1   May 5, 2000
 * @author      Franck van Breugel
 */
public class QueueEmptyException extends RuntimeException 
{
    /** 
     * Constructs a QueueEmptyException without error message.
     */
    public QueueEmptyException() 
    {
        super();
    }

    /** 
     * Constructs a QueueEmptyException with the specified error message.
     * @param errorMessage Error message.
     */
    public QueueEmptyException(String errorMessage) 
    {
        super(errorMessage);
    }
}