import java.util.GregorianCalendar;
import java.util.Calendar;

public class Lucyscalendar{
    public static void main (String args[])
   {

        //get today's date by creating a new calendar
        GregorianCalendar cal = new GregorianCalendar();

        //gets the date 100 days from today
        String day100 = cal.add(Calendar.DAY_OF_MONTH, 100);

         // I want to create a new calendar based on my birthday
        GregorianCalendar LucyBirthday = new GregorianCalendar(1988, Calendar.September, 18);

        //gives me weekday of my birdthday
        int lucyDay =LucyBirthday.get(Calendar.DAY_OF_WEEK);

        //i want to get 1000 days from my birthday
        int lucyGrand = LucyBirthday.add(Calendar.DAY_OF_MONTH, 10000);

        int dayofMonth= cal.get(Calendar.DAY_OF_MONTH);
        int  month= cal.get(Calendar.MONTH);
        int  year= cal.get(Calendar.YEAR);
        int weekday = cal.get(Calendar.DAY_OF_WEEK);

        System.out.println ("A hundred days from today will be " +day100+ ".");
        System.out.println( "My birdthday was on a " +lucyDay);
        System.out.println("A thousand days from my birthday would be " +lucyGrand+ ".");
    }
}

Lucyscalendar.java:14: cannot find symbol
symbol  : variable September
location: class java.util.Calendar
        GregorianCalendar LucyBirthday = new GregorianCalendar(1988, Calendar.September, 18);
                                                                             ^
Lucyscalendar.java:16: incompatible types
found   : void
required: java.lang.String
        String day100 = cal.add(Calendar.DAY_OF_MONTH, 100);
                               ^
Lucyscalendar.java:22: incompatible types
found   : void
required: int
        int lucyGrand = LucyBirthday.add(Calendar.DAY_OF_MONTH, 10000);
                                        ^

import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Calendar;

public class Lucyscalendar{
    public static void main (String args[])
   {

        //get today's date by creating a new calendar
        GregorianCalendar cal = new GregorianCalendar();

        //gets the date 100 days from today
        // the method add(...) is a void it does not return a String
        // String day100 = cal.add(Calendar.DAY_OF_MONTH, 100);
        // you will have to proceed in 2 steps
        cal.add(Calendar.DAY_OF_MONTH, 100);
        String day100 = cal.getTime().toString();
        
         // I want to create a new calendar based on my birthday
         // Java constants are usually in UPPERCASE
        // GregorianCalendar LucyBirthday = new GregorianCalendar(1988, Calendar.September, 18);
        GregorianCalendar LucyBirthday = new GregorianCalendar(1988, Calendar.SEPTEMBER, 18);

        //gives me weekday of my birdthday
        int lucyDay = LucyBirthday.get(Calendar.DAY_OF_WEEK);

        //i want to get 1000 days from my birthday
        // add() again does not return nothing
        // int lucyGrand = LucyBirthday.add(Calendar.DAY_OF_MONTH, 10000);
        LucyBirthday.add(Calendar.DAY_OF_MONTH, 10000);
        String lucyGrand = LucyBirthday.getTime().toString();

        int dayofMonth= cal.get(Calendar.DAY_OF_MONTH);
        int  month= cal.get(Calendar.MONTH);
        int  year= cal.get(Calendar.YEAR);
        int weekday = cal.get(Calendar.DAY_OF_WEEK);

        System.out.println ("A hundred days from today will be " +day100+ ".");
        System.out.println( "My birdthday was on a " +lucyDay);
        System.out.println("A thousand days from my birthday would be " +lucyGrand+ ".");
    }
}

import java.util.Calendar;
import java.util.GregorianCalendar;


public class Project2_1
{
    public static void main (String [] args)
    {
        //Create a new calendar to get today's date
        GregorianCalendar cal = new GregorianCalendar();

        //adds a 100 days to today's date
        cal.add(Calendar.DAY_OF_MONTH,100);

        
        single String day100 = cal.getMinimumTim() .toString();

        cal.add(Calendar.DAY_OF_WEEK,100);

        //Calendar.DAY_OF_WEEK

        //int Week100 = GregorianCalendar.get (Calendar.DAY_OF_WEEK, 100);

        //String week100 = cal.getTimeMinimum().toString ();

        //protected void computeFields;
        //int week100;r

        //String strweek100;

        //Create a new calendar based on my birthday
        GregorianCalendar NikkisBirthday = new GregorianCalendar (1982, Calendar.MARCH, 20);

        //Gets the weekday of my birthday
        int NikkiDay = NikkisBirthday.get (Calendar.DAY_OF_WEEK);

        //Adds 10,000 days from my birthday
        NikkisBirthday.add (Calendar.DAY_OF_MONTH,10000);

        //String nikkiBDayThou = NikkisBirthday.getMinimumTime().toString();

        int dayOfMonth = cal.get (Calendar.DAY_OF_MONTH);

        int month = cal.get(Calendar.MONTH);

        int year = cal.get(Calendar.YEAR);

        int weekday = cal.get(Calendar.DAY_OF_WEEK);

        //Prints out what a 100 days from today would be
        System.out.println ("The day that is 100 days from today is: " + day100);

        //Prints out what 100 weekdays from today would be
        //System.out.println ("The weekday that is 100 days from today is: " + week100);

        //Prints out the weekday of my birthday
        System.out.println ("The weekday of my birthday is: " + NikkiDay);

        //Prints out what 10,000 days from my birthday would be
        System.out.println ("The date that is 10,000 days from my birthday is: " + nikkiBDayThou);


    }
}

      
        single String day100 = cal.getMinimumTim() .toString();