Using methods and objects, but no arrays

Question

I was here earlier before, and got pointed in the right direction. But I couldn't get the offered solution to work. It now mostly works, but i'm stuck on one part, and I'm not sure how to proceed. If anyone can point me to the right direction, i'll be grateful. I just need a hint, or pointers to something I'm not seeing.
I'm trying to add a random number of days, and determine what that adds up to. I know I have to have a counter that flips over after 7, but I've tried everything, and keep getting errors

import java.util.*;
public class pooped
{
    static Scanner console = new Scanner(System.in);

    public static void main(String[] args) 
    {
        int day;
        System.out.println(" Days of the week are numbered 1-7"+
                    "From Sunday to Saturday, enter a number now");
        day = console.nextInt();

        System.out.println(isWeek(day));
        printday(day);
    }

    public static boolean isWeek(int day)
    {
        return day >= 0 && day <= 7;
    }

    static Scanner console = new Scanner(System.in);

    public static void addDay()
    {
        int date;
        System.out.println("Enter how many days you want to go forward.");
        date = console.nextInt();

        if (int date > 0)
        {
            int day = date + 1;
        }
    }

    public static void printday(int day) 
    {
        switch (day) {

        case 1:
            System.out.println("Sunday");
        break;

        case 2:
            System.out.println("Monday");
        break;

        case 3:
            System.out.println("Tuesday");
        break;

        case 4:
            System.out.println("Wednesday");
        break;

        case 5:
            System.out.println("Thursday");
        break;

        case 6:
            System.out.println("Friday");
        break;

        case 7:
            System.out.println("Saturday");

        default:
        break;
        }
    }
}

I'm trying to add a random number of days, and determine what that adds up to. I know I have to have a counter that flips over after 7, but I've tried everything, and keep getting errors. — Rein Fowler
– Rein Fowler, Commented May 5, 2015 at 15:18

davide · Accepted Answer · 2015-05-05 15:22:35Z

1

If you need

a counter that flips over after 7

consider using day = day % 7; in your main method, which gives you the modulo operation.

answered May 5, 2015 at 15:22

davide

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Comments

nullPointer · Accepted Answer · 2015-05-05 15:27:26Z

0

When you say "I have to have a counter that flips over after 7", do you mean that 7 should roll back to 0, 8 to 1, etc? If that's the case, you need to look at the modulus operator (%)

You inWeek function looks incorrect. If your day is 0 based, it should be:

public static boolean isWeek(int day)
{
    return day >= 0 && day < 7;
}

Otherwise you will have 8 days.

answered May 5, 2015 at 15:27

nullPointer

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