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Thread: Overloading a method

  1. #1
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    Default Overloading a method

    Hello, Previously I was asked to post a specific question.. so I hope this one specific enough

    This is in concern to the exercise mentioned here
    Question about an exercise from D.S. Malik's Book "Java Programming"

    Now, here is my code:

     
    public class DayType {
     
    	final static int SUN = 1;
        final static int MON = 2;
        final static int TUE = 3;
        final static int WED = 4;
        final static int THU = 5;
        final static int FRI= 6;
        final static int SAT = 7;
     
        private int day;
     
        public DayType(int day) {
                this.day = day;
        }
     
        public void setDay(int day){
                this.day = day;
        }
     
        public int getDay() {
                return day;
        }
     
        public void print() {
                System.out.println(this.toString());
        }
        public int nextDay(){
                int next;
                if (day<7)
                {
                	next = (day + 1);
                }
                else
                {
                next = 1;
                }
                return next;
        }
        public int previousDay(){
                int prevDay;
                if (day>1)
                {
                	prevDay = (day - 1);
                }
                else
                {
                	prevDay = 7;
                }
                return prevDay;
        }
        public int addDays(int days) {
                return (day + days) % 7;
        }
                public String toString() {
                switch (this.day) {
                case SUN:
                        return "Sunday";
                case MON:
                        return "Monday";
                case TUE:
                        return "Tuesday";
                case WED:
                        return "Wednesday";
                case THU:
                        return "Thursday";
                case FRI:
                        return "Friday";
                case SAT:
                        return "Saturday";
                }
                return "";
        }       
        public static void main(String[] args) {
                System.out.println("******Test Day******");
                System.out.println();
                System.out.print("Set day: ");
                DayType d = new DayType(SUN);
                d.print();
                System.out.print("Next day: ");
                d.setDay(d.nextDay());
                d.print();
                System.out.print("Previous day: ");
                d.setDay(d.previousDay());
                d.print();
                System.out.print("After 5 days: ");
                d.setDay(d.addDays(5));
                d.print();
        }       
    }

    The output of this code is as follows:

    ******Test Day******
     
    Set day: Sunday
    Next day: Monday
    Previous day: Sunday
    After 5 days: Friday


    First of all, the problem is that my previous day comes out to be Sunday instead of Saturday, even though I don't see any problem with the code.

    Secondly, I don't know what overloading means in JAVA. I want to overload the methods for items A and C (from the question). The overloaded methods should accept and return an int value representing the day of week (e.g. Sunday = 1, Monday =2, , Saturday = 7).

    Please help me!
    Thanks


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Overloading a method

    I don't know what overloading means in JAVA. I want to overload the methods for items A and C
    First you should spend some time researching what overloading methods means.
    http://docs.oracle.com/javase/tutori...O/methods.html

    Why do you think you want to overload methods?
    What method do you want to overload?
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Overloading a method

    If I follow your logic correctly...
    Set day: Sunday
    Next day: Monday // d.setDay(d.nextDay()) == setDay(MON)
    Previous day: Sunday // So how could this be Saturday if you just set your day to Monday
    After 5 days: Friday
    Last edited by mariostg; April 15th, 2013 at 12:47 PM. Reason: typo + clarify

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