Java format A detailed difference between dates

Question

I am sure that this was asked earlier in some other way that I simply cannot find, so I apologize for repeating if I am.

I am trying to calculate the difference between two dates, and then display this difference in days, minutes and seconds; something like "3 days 23 minutes and 59 seconds"

Very easy, I'm sure, but I'm a guy from C # in practice, so it's not easy for me to think about a box on this.

Thanks in advance!

Answer 1

Date start = new Date(2010, 10, 13);
Date end   = new Date(2010, 10, 18);

long diffInMillis = end.getTime() - start.getTime();

long diffInDays  = diffInMillis/1000/86400;
long diffInHours = (diffInMillis/1000 - 86400*diffInDays) / 3600;
long diffInMins  = (diffInMillis/1000 - 86400*diffInDays - 3600*diffInHours) / 60;
long diffInSecs  = (diffInMillis/1000 - 86400*diffInDays - 3600*diffInHours - 60*diffInMins);

Answer 2

Calendar Date, Java API. . , , . , .

Joda-Time Period, , .

Answer 3

This is what I did, it works for me, but I'm sure it can be improved, or even there may be a hidden (for me) class that does this ...

/*Imports*/

package javatest;
import java.util.Date;
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        long segundo = 1000;
        long minuto = segundo * 60;
        long hora = minuto * 60;
        long dia = hora * 24;
        long semana = dia * 7;
        long mes = dia * 30;
        long anio = mes * 12;

        long startDate = new Date().getTime();
        //startDate = startDate - (semana + hora + 30 * minuto + anio*2);
        startDate = startDate - (mes);
        long endDate = new Date().getTime();

        System.out.println("Inicio: " + new Date(startDate));
        System.out.println("Final: " + new Date(endDate));

        System.out.println(PrettifyDateDiff(endDate - startDate, true));
    }

    private static String PrettifyDateDiff(long dateDiff, boolean showDisclaimer) {
        /* Constantes utilizadas para facilitar
         * la lectura de la aplicación
         */

        long second = 1000;
        long minute = second * 60;
        long hour = minute * 60;
        long day = hour * 24;
        long week = day * 7;
        long month = day * 30;
        long year = month * 12;

        // Dividimos los milisegundos entre su equivalente de
        // las constantes de arriba para obtener el valor en la
        // escala de tiempo correspondiente.
        long minutes = dateDiff / minute;
        long hours = dateDiff / hour;
        long days = dateDiff / day;
        long weeks = dateDiff / week;
        long months = dateDiff / month;
        long years = dateDiff / year;

        String prettyDateString = "";

        if (minutes > 60) {
            prettyDateString = minutes - (hours * 60) + " minutos.";

            if (hours > 24) {
                prettyDateString = hours - (days * 24) + " horas " + prettyDateString;

                if (days > 7) {
                    prettyDateString = days - (weeks * 7) + " dias " + prettyDateString;

                    if(weeks > 4){
                        prettyDateString = weeks - (months * 4)  + " semanas " + prettyDateString;

                        if(months > 12){

                            prettyDateString = months - (years * 12) + " meses " + prettyDateString;

                            if(years > 0){
                                prettyDateString = years + " años " + prettyDateString;
                            }
                        }else{
                            prettyDateString = months  + " meses " + prettyDateString;
                        }

                    }else{
                        prettyDateString = weeks + " semanas " + prettyDateString;
                    }
                } else {
                    prettyDateString = days + " dias " + prettyDateString;
                }
            } else {
                prettyDateString = hours + " horas " + prettyDateString;
            }

        } else {
            prettyDateString = minutes + " minutos.";
        }

        if(showDisclaimer && (weeks > 0 || months > 0)){
            prettyDateString += " (Semanas de 7 dias, Meses de 30 dias).";
        }

        return prettyDateString;
    }
}