Android: Get year, month, day from GregorianCalendar Object

Question

The GregorianCalendar constructor asks for the following:

GregorianCalendar(int year, int month, int dayOfMonth);

How can I extract the year, month, and day from an object I have created. Right now I'm using object.YEAR, object.MONTH, and object.DAY_OF_MONTH, but that does not seem to be giving me the right numbers.

Thanks.

Here I get a date based on which calendar date a user clicks. The user can then enter some information into that date which is stored in a HashMap keyed on GregorianCalendar.

cal.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
            @Override
            public void onSelectedDayChange(CalendarView view, int year, int month, int dayOfMonth) {

                selectedDate = new GregorianCalendar(year, month, dayOfMonth);

Here I am trying to write the date from the GregorianCalendar year, month, and day parameters to a file to be used later.

private void writeToFile() {
        try
        {
            PrintWriter writer = new PrintWriter(file, "UTF-8");
            for (GregorianCalendar gregObject: recipes.keySet()) {
                String[] value = recipes.get(gregObject);
                int y = gregObject.YEAR;
                int m = gregObject.MONTH;
                int d = gregObject.DAY_OF_MONTH;

                writer.printf("%d %d %d ", y, m, d);

Here is how I read from the file. When I read from the file I get the numbers 1,2,5 for year, month, and date which is wrong. The rest of the information read is correct.

try
            {
                Scanner getLine = new Scanner(file);
                Scanner tokenizer;

                while (getLine.hasNextLine()) {
                    String line = getLine.nextLine();
                    tokenizer = new Scanner(line);
                    System.out.println(line);

                    while (tokenizer.hasNextInt()) {
                        int y1 = tokenizer.nextInt();
                        int m1 = tokenizer.nextInt();
                        int d1 = tokenizer.nextInt();

Obviously I think I am writing the year, month, and day wrongly to the file, so I'm trying to figure out the correct way to extract the year, month, and day from a GregorianCalendar object.

Answer 1

Hope following helps: I am using 2015/06/10 as input. Please note month values are 0 (Jan) - 11 (Dec).

package demo;

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

/**
 * Create on 4/3/16.
 */
public class TestCalendar {

    public static void main(String [] args){
        Calendar cal = new GregorianCalendar(2015,05,10); // Month values are 0(Jan) - 11 (Dec). So for June it is 05
        int year = cal.get(Calendar.YEAR);
        int month = cal.get(Calendar.MONTH);      // 0 - 11 
        int dayOfMonth = cal.get(Calendar.DAY_OF_MONTH);
        // Following must output 2015/06/10
        System.out.printf("Provided date is %4d/%02d/%02d", year, month+1,     dayOfMonth);
    }
}