Help Needed

[Michael Monan]

Ok, I'm having problems trying to display the numbers which should form part of a Calender layout, i.e, like the windows Calender. Now I have the surrounding code set up, but I am having trouble trying to get the code that will actually display the numbers when the program is run. I'm pretty poor at Java so its is most likely a simple problem. Thanks In advance
My program so far(Date Class):
import textio.ConsoleIO;
public class Date
{
public static voidmain(String[] args)

{
int day = -1;
int month = -1;
int year = -1;

{
ConsoleIO.out.print("Enter day number: ");
day = ConsoleIO.in.readInt();

if (day < 0)
ConsoleIO.out.println("Invalid day");
else if (day == 0)
printDay(0);
else if (day == 1)
printDay(1);
else if (day == 2)
printDay(2);
else if (day == 3)
printDay(3);
else if (day == 4)
printDay(4);
else if (day == 5)
printDay(5);
else if (day == 6)
printDay(6);
else if (day > 6)
ConsoleIO.out.println("Invalid day");
}

{
ConsoleIO.out.print("Enter month number: ");
month = ConsoleIO.in.readInt();

if (month < 1)
ConsoleIO.out.println("Invalid month");
else if (month == 1)
printMonth(1);
else if (month == 2)
printMonth(2);
else if (month == 3)
printMonth(3);
else if (month == 4)
printMonth(4);
else if (month == 5)
printMonth(5);
else if (month == 6)
printMonth(6);
else if (month == 7)
printMonth(7);
else if (month == 8)
printMonth(8);
else if (month == 9)
printMonth(9);
else if (month == 10)
printMonth(10);
else if (month == 11)
printMonth(11);
else if (month == 12)
printMonth(12);
else if (month >12)
ConsoleIO.out.println("Invalid month");
}

ConsoleIO.out.print("Enter year number: ");
year = ConsoleIO.in.readInt();
ConsoleIO.out.println(year);

}

public static voidprintDay(int day)
{
if (day == 0)
ConsoleIO.out.print("Sunday");
if (day == 1)
ConsoleIO.out.print("Monday");
if (day == 2)
ConsoleIO.out.print("Tuesday");
if (day == 3)
ConsoleIO.out.print("Wednesday");
if (day == 4)
ConsoleIO.out.print("Thursday");
if (day == 5)
ConsoleIO.out.print("Friday");
if (day == 6)
ConsoleIO.out.print("Saturday");
}

public static void printMonth(int month)
{
if (month == 1)
ConsoleIO.out.print("January");
if (month == 2)
ConsoleIO.out.print("February");
if (month == 3)
ConsoleIO.out.print("March");
if (month == 4)
ConsoleIO.out.print("April");
if (month == 5)
ConsoleIO.out.print("May");
if (month == 6)
ConsoleIO.out.print("June");
if (month == 7)
ConsoleIO.out.print("July");
if (month == 8)
ConsoleIO.out.print("August");
if (month == 9)
ConsoleIO.out.print("September");
if (month == 10)
ConsoleIO.out.print("October");
if (month == 11)
ConsoleIO.out.print("November");
if (month == 12)
ConsoleIO.out.print("December");
}

public static voidprintDate(int day,int month,int year)

{

int zeller=Calendar.dateToZeller(day,month,year);

printDay(zeller);
ConsoleIO.out.print(","+day+",");
printMonth(month);
ConsoleIO.out.print(","+year);
}

public static int dates(int day1,int month1,int year1,int day2,int month2,int year2)

{
int date1=Calendar.dateToJulian(day1,month1,year1);
int date2=Calendar.dateToJulian(day2,month2,year2);

return date2-date1;
}

public void setDate(int day,int month,int year)
{
days.setValue(day);
months.setValue(month);
years.setValue(year);
}
}

Calender Class

public class Calendar {
public static int dateToZeller(int day, int month, int year){
int dd = day;
int mm = month;
int yy = year;
if(month < 3) {
mm = month + 10;
yy = year - 1;
}else
mm = month - 2;
int yr = yy % 100;
int cent = yy / 100;
return ((700 + (26 * mm - 2) / 10 + dd + yr + (yr / 4) + (cent / 4) - 2 * cent) % 7);
}
public static int dateToJulian(int day, int month, int year) {
int mm = month;
int yy = year;
if(month > 2)
mm = mm - 3;
else {
mm = mm + 9;
yy--;
}
int cent = yy / 100;
int yr = yy % 100;
return ((146097 * cent) >> 2) + ((1461 * yr) >> 2) + (153 * mm + 2) / 5 + day + 1721119;
}
}
Class Main4
import textio.ConsoleIO;
public class Main4
{
public static void main(String[]args)
{
int day=1;
ConsoleIO.out.print("Please Enter a Month: ");
int month=ConsoleIO.in.readInt();
ConsoleIO.out.print("Please Enter a Year: ");
int year=ConsoleIO.in.readInt();
Date.printCalendar(day,month,year);
Date.daysInMonth(day,month,year);
}
}
Quick Expalnation of what each class is doing:
Date Class --> Contains all the code to run the calender. This is where the code to display the number will go
Calender Class --> The calendar class contains two static methods:
(a)dateToZeller which converts a Georgian date into an encoding for the day of the
week, where 0 represents Sunday, 1 is Monday,..., and 6 is Saturday;
and the method
(b) dateToJulian which converts a date into a julian number representing the number
of days that have elapsed since some distant epoch.
[ May 06, 2004: Message edited by: Michael Monan ]

[Craig Wood]

import java.io.*;
 
public class DateTest
{
    public static void main(String[] args)
    {
        System.out.print("Enter day number: ");
        int day = Read.readInput();
        printDay(day);
 
        System.out.print("Enter month number: ");
        int month = Read.readInput();
        printMonth(month);
 
        System.out.print("Enter year number: ");
        int year = Read.readInput();
        System.out.println(String.valueOf(year));
 
        printDate(day, month, year);
    }
 
    public static void printDay(int day)
    {
        if (day < 0 || day > 6)
        {
            System.out.println("Invalid day");
            return;
        }
        if (day == 0)
            System.out.print("Sunday"); 
        if (day == 1)
            System.out.print("Monday");
        if (day == 2)
            System.out.print("Tuesday");
        if (day == 3)
            System.out.print("Wednesday"); 
        if (day == 4)
            System.out.print("Thursday"); 
        if (day == 5)
            System.out.print("Friday"); 
        if (day == 6)
            System.out.print("Saturday"); 
    }
 
    public static void printMonth(int month)
    {
        if (month < 1 || month > 12)
        {
            System.out.println("Invalid month");
            return;
        }
        if (month == 1)
            System.out.print("January");
        if (month == 2)
            System.out.print("February");
        if (month == 3)
            System.out.print("March"); 
        if (month == 4)
            System.out.print("April"); 
        if (month == 5)
            System.out.print("May"); 
        if (month == 6)
            System.out.print("June"); 
        if (month == 7)
            System.out.print("July"); 
        if (month == 8)
            System.out.print("August"); 
        if (month == 9)
            System.out.print("September"); 
        if (month == 10)
            System.out.print("October");
        if (month == 11)
            System.out.print("November");
        if (month == 12)
            System.out.print("December");
    } 
 
    public static void printDate(int day, int month, int year)
    {
        int zeller = CalendarUtility.dateToZeller(day,month,year);
 
        printDay(zeller);
        System.out.print(", " + day + ", ");
        printMonth(month);
        System.out.print(", " + year); 
    }
 
    public static int dates(int day1,int month1,int year1,int day2,int month2,int year2)
    {
        int date1 = CalendarUtility.dateToJulian(day1, month1, year1);
        int date2 = CalendarUtility.dateToJulian(day2, month2, year2);
 
        return date2 - date1;
    }
 
    public void setDate(int day, int month, int year)
    {
//        days.setValue(day);
//        months.setValue(month);
//        years.setValue(year);
    }
}
 
class Read
{
    static BufferedReader br = new BufferedReader(
                               new InputStreamReader(System.in));
 
    public static int readInput()
    {
        try
        {
            String input = br.readLine();
            int number = Integer.parseInt(input);
            return number;
        }
        catch(IOException ioe)
        {
            System.out.println(ioe.getMessage());
            return -1;
        }
    }
}
 
class CalendarUtility
{
    public static int dateToZeller(int day, int month, int year)
    {
        int dd = day;
        int mm = month;
        int yy = year; 
        if(month < 3)
        {
            mm = month + 10;
            yy = year - 1;
        } else
            mm = month - 2; 
        int yr = yy % 100;
        int cent = yy / 100; 
        return ((700 + (26 * mm - 2) / 10 + dd + yr + (yr / 4) +
                (cent / 4) - 2 * cent) % 7);
    }
 
    public static int dateToJulian(int day, int month, int year)
    {
        int mm = month;
        int yy = year; 
        if(month > 2)
            mm = mm - 3;
        else
        {
            mm = mm + 9;
            yy--;
        } 
        int cent = yy / 100;
        int yr = yy % 100; 
        return ((146097 * cent) >> 2) + ((1461 * yr) >> 2) +
                (153 * mm + 2) / 5 + day + 1721119;
    }
}

[Michael Monan]

Now I'm having problems with Main4, which isn't working because of the changes

import textio.ConsoleIO;
public class Main4
{
public static voidmain(String[]args)

{

int day=1;
ConsoleIO.out.print("Please Enter a Month: ");
int month=ConsoleIO.in.readInt();

ConsoleIO.out.print("Please Enter a Year: ");
int year=ConsoleIO.in.readInt();

Date.printCalendar(day,month,year);
Date.daysInMonth(day,month,year);

}
}
I think it is something to do with the way the (int,int,int) is set out?

[Michael Monan]

Thanks mate, I've done it differently and it is now working fine