fleetcalculator.java

Java经典例程 从外国一大学计算机教授出版物下载的代码 经典

class FleetCalculator {

   /* The Fleet Calculator Program         by J M Bishop  Aug 1996
    * ----------------------------         Java 1.1 Oct 1997
    *                                      update and Java 2, Apr 2000
    * Works out the new arrival time for vehicles that
    * do a journey in 15% less time.
    *
    * Illustrates expressions and assignment.
    * Includes use of the modulo operator %
    */

  FleetCalculator () {

    int reduction = 85;
    int depart24 = 900;
    int arrive24 = 1020;

    int newArrive24,           // 24 hour clock time
        departMins,            // minutes in a day
        arriveMins,
        oldJourneyMins,
        newJourneyMins,
        newArriveMins;

  // convert the initial times to minutes
     departMins = depart24 / 100 * 60 + depart24 % 100;
     arriveMins = arrive24 / 100 * 60 + arrive24 % 100;

  // calculate the old and new times
     oldJourneyMins = arriveMins - departMins;
     newJourneyMins = oldJourneyMins * reduction / 100;

  // create the new arrival time in minutes and
  // then in a 24 hour clock time
     newArriveMins = departMins + newJourneyMins;
     newArrive24 = newArriveMins / 60 * 100 + newArriveMins % 60;

  // Report on the findings
     System.out.println("Departure time is "+depart24);
     System.out.println("Old arrival time is "+arrive24);
     System.out.println("Old journey time is "
                       +oldJourneyMins+" minutes");
     System.out.println("New journey time is "
                       +newJourneyMins+" minutes");
     System.out.println("New arrival time is "+newArrive24);
   }

   public static void main (String[] args) {
     new FleetCalculator ();
   }
 }