package rpi.goldsd.graph;

/**
 * The <tt>PathDoesNotExistException</tt> class represents an exception that
 * should be thrown when a method fails because a path does not exist.
 * As an example, refer to the <tt>findShortestPath()</tt> method.
 *
 * @see Algorithms
 * @version 2.0, 4/16/98
 * @author David Goldschmidt
 */
public class PathDoesNotExistException extends RuntimeException
{
  /**
   * The default constructor simply calls the default constructor
   * of the parent class <tt>RuntimeException</tt>.
   */
  public PathDoesNotExistException()  { super(); }


  /**
   * This constructor calls the corresponding constructor of the
   * parent class <tt>RuntimeException</tt> with the <tt>String</tt>
   * argument to be displayed.
   * @param s the <tt>String</tt> object to be displayed.
   */
  public PathDoesNotExistException( String s )  { super( s ); }
}