001    package javax.realtime;
002    
003    /** This exception is used to indicate a situation where an instance of
004     *  <code>AsyncEvent</code> attempts to bind to a happening that does not exist.
005     */
006    public class UnknownHappeningException extends Exception {
007    
008        /** A constructor for <code>UnknownHappeningException</code>. */
009        public UnknownHappeningException() {
010            super();
011        }
012    
013        /** A descriptive constructor for <code>UnknownHappeningException</code>
014         *
015         *  @param s Description of the error.
016         */
017        public UnknownHappeningException(String s) {
018            super(s);
019        }
020    }