Easter Calculator

I have to do this program for a class I am taking, but I keep getting an error that says "variable year might not have been initialized". Also I'm not completely finished with it yet, I just need help getting around this error.

heres my code:

Code:

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import java.util.Scanner;
public class EasterSunday
{
        public static void main(String[] args)
        {
                int year; // declarations
                int a = year%19;
                int b = year%4;
                int c = year%7;
                int d = (19 * a + 24) %30;
                int e = (2 * b + 4 * c + 6 * d + 5) %7;
                int eSunday = (22 + d + e);
                Scanner in = new Scanner(System.in); //start Scanner
                System.out.println("Enter in a year to find out the day and month of that Easter Sunday.");
                year = in.nextInt();
                if ((year >= 1900) && (year <= 2099) && (year != 1954) && (year != 1981) && (year != 2049) && (year != 2076))
                        if (eSunday <= 30)
                                System.out.println("Easter Sunday in " + year + "is March " + eSunday);
                        else
                                System.out.println("Easter Sunday in " + year + " is April, " + (eSunday - 30));
                //else
                        //System.out.println("");
        }
}

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The compiler message means what it says: you say "a=year%19" before you assign year a value, and you can't do that.

wow! sorry I was being dumb! Im a complete noob so bare with me. Thanks for the quick reply btw. Okay so I fixed and finished my program and it runs good, but I cant get it to run in eclipse. Everytime I try to run it says "Editor does not contain a main type."

Heres my finished code:

Code:

---

import java.util.Scanner;
public class EasterSunday
{
        public static void main(String[] args)
        {
                int year; // declarations
                Scanner in = new Scanner(System.in); //start Scanner
                System.out.println("Enter in a year to find out the day and month of that Easter Sunday.");
                year = in.nextInt();
                int a = year%19;
                int b = year%4;
                int c = year%7;
                int d = (19 * a + 24) %30;
                int e = (2 * b + 4 * c + 6 * d + 5) %7;
                int eSunday = (22 + d + e);
                if ((year >= 1900) && (year <= 2099) && (year != 1954) && (year != 1981) && (year != 2049) && (year != 2076))
                {
                        if (eSunday <= 30)
                                System.out.println("Easter Sunday in " + year + " is March, " + eSunday);
                        else
                                System.out.println("Easter Sunday in " + year + " is April, " + (eSunday - 30));
                }
                else
                {
                        if (eSunday <= 30)
                                System.out.println("Easter Sunday in " + year + " is March, " + (eSunday - 7));
                        else
                                System.out.println("Easter Sunday in " + year + " is April, " + (eSunday - 37));
                }
        }
}

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"Editor does not contain a main type."

Yes, but you trying to run EasterSunday, not Editor. Try right clicking on the icon for this class on the left hand side somewhere, right clicking and seeing if there is a Run command.

(Sorry I don't have Eclipse to hand)

yea that didnt really help and im trying to run the file, not the editor, so i dont know whats going on. anybody else have any ideas?

Quote:

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Originally Posted by nevets93

yea that didnt really help and im trying to run the file, not the editor, so i dont know whats going on. anybody else have any ideas?

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In Eclipse you can run a 'Launch Configuration'. Go to Run > Run Configurations ... create a 'Java Application' configuration; give it a name, select the project and the class that contains the main( ... ) method and run it.

kind regards,

Jos