question: public static String formatTime ( String millis ) { String result ; try { long time = Long . valueOf ( millis ) ; result = formatTime ( time ) ; } catch ( NumberFormatException e ) { throw new IllegalArgumentException ( "Provided value must be in integer in milliseconds. Value was: " + millis ) ; } return result ; }
target:  Convert the time it took to compute these results into a label to add to the scorecard.