Thread: Gregorian to Julian and vise versa

Hello i need help is it possible to make a program where you choose gregorian and the output is julian and vise versa in about 4 lines?
please i need help i dont know how to start it

I have this but its wrong and i dont know exactly what the output is because it has a problem.

package calendar;
public static void main(String[] args) {
public class Calendar
private static double julianDate(int year, int month, int day) { 
if (month <= 2) { 
year -= 1; 
month += 12; } 
double A = Math.floor(year / 100.0); 
double B = 2 - A + Math.floor(A / 4.0); 
double JD = Math.floor(365.25 * (year + 4716)) + Math.floor(30.6001 * (month + 1)) + day + B - 1524.5; 
return JD;
    }
}

run:
Error: Main method not found in class calendar.Calendar, please define the main method as:
public static void main(String[] args)
Java Result: 1
BUILD SUCCESSFUL (total time: 1 second)

If the message doesn't make sense after looking (carefully) at your code, then I suggest you look (carefully) at every working example in your textbook, class notes, on-line tutorial or whatever material you are learning from.

Don't they all look kind of like this?

 
// May have a package statement
 
// May have one or more import statements
 
public class Whatever {
 
    // May have various kinds of variables and/or methods for the class
 
    public static void main(String [] args) {
 
        // Stuff here that will be executed
 
    } // End of main
 
    // May have various kinds of variables and/or methods for the class
 
} // End of class definition

Bottom line: The main() thingie is a method of a public class, and, therefore, is defined totally within the class.


Cheers!

Z