Check if two objects of the class java.util.calendar point to the same day without taking into account the time

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Check if two objects of the class java.util.calendar point to the same day without taking into account the time

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#1 by (0 votes)

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I'm trying to compare two dates stored in calendar objects. At the time of seeing if they are equal or minor, or not, I have no problem, the difficulty arises when some of those calendar objects have a date and time stored, and others do not. What I would like to know is if there is a way to verify if 2 calendars have the same date without taking into account the time

I have this code:

    Calendar cal = Calendar.getInstance();
    cal.set(2018, 1, 28, 7, 4, 0);

    if(cal.equals(Calendar.getInstance())){
        System.out.println("hoy");
    }

java calendar

asked by Arturo Ruiz Pascual 28.02.2018 в 22:06

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1 answer

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score 0 · Accepted Answer

You can convert the calendar to date and format it and only have the date without time and then that date convert it back to calendar type for example:

package javaapplication2;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

/**
 *
 * @author SoftMolina
 */
public class CalendarDate {

    public static void main(String[] args) {
        try {
            //Convertimos Calendar a Date
            Calendar calendar = Calendar.getInstance();
            Calendar calendar2 = Calendar.getInstance();

            Date dateCalendar = calendar.getTime();
            Date dateCalenda2 = calendar.getTime();

            System.out.println(dateCalendar);

            //Damos formato a la fecha
            SimpleDateFormat sdf = new SimpleDateFormat("dd-M-yyyy");

            String dateS = sdf.format(dateCalendar);
            Date dateD = sdf.parse(dateS);

            String dateS2 = sdf.format(dateCalenda2);
            Date dateD2 = sdf.parse(dateS2);

            System.out.println(dateD);

            //Convertimos el date calendar
            calendar.setTime(dateD);
            calendar2.setTime(dateD2);

            //Calendar sin tiempo
            System.out.println(calendar);
            System.out.println(calendar2);

            //Comparamos las 2 fechas
            System.out.println(calendar.equals(calendar2));
        } catch (Exception e) {
        }
    }

}

Result:

run:
Resultado comparacion: true
BUILD SUCCESSFUL (total time: 0 seconds)