I am getting wrong time between two dates in Joda-Time

问题

I am getting incorrect results whatever I do. Could anyone give me some advise please :).

Here is the code of my program the is responsible for getting the time between two dates.

I am getting a result but the problem is that it is incorrect and I have having trouble finding the problem.

I have to Joda library in my project.

if (timerightnow.isSelected()) {
            DateFormat getdate = new SimpleDateFormat("dd/MM/yy HH:mm:ss");
            Date getdate1 = new Date(); 

            String datenow = getdate1.toString();

            String monthnow = datenow.substring(4, 7);
            String daynow = datenow.substring(8,10);
            String hournow = datenow.substring(11,19);
            String yearnow = datenow.substring(25, 29);

            if (monthnow.equalsIgnoreCase("jan"))
                monthnow = "01";
            if (monthnow.equalsIgnoreCase("feb"))
                monthnow = "02";
            if (monthnow.equalsIgnoreCase("mar"))
                monthnow = "03";
            if (monthnow.equalsIgnoreCase("apr"))
                monthnow = "04";
            if (monthnow.equalsIgnoreCase("may"))
                monthnow = "05";
            if (monthnow.equalsIgnoreCase("jun"))
                monthnow = "06";
            if (monthnow.equalsIgnoreCase("jul"))
                monthnow = "07";
            if (monthnow.equalsIgnoreCase("agu"))
                monthnow = "08";
            if (monthnow.equalsIgnoreCase("sep"))
                monthnow = "09";
            if (monthnow.equalsIgnoreCase("oct"))
                monthnow = "10";
            if (monthnow.equalsIgnoreCase("nov"))
                monthnow = "11";
            if (monthnow.equalsIgnoreCase("dec"))
                monthnow = "12";

            String timenow = monthnow + "/" + daynow + "/" + yearnow + " " + hournow;
            String timetotext = timeto.getText();
            SimpleDateFormat date = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss");


            Date datestart = null;
            Date dateend = null;



             try {

                 datestart = date.parse(timenow);
                 dateend = date.parse(timetotext);

                 DateTime datestartdaytime = new DateTime(datestart);
                 DateTime dateenddaytime = new DateTime(dateend);

                 JOptionPane.showMessageDialog(null, datestartdaytime + "\n" + dateenddaytime);

                int monthoutput = Months.monthsBetween(datestartdaytime, dateenddaytime).getMonths();
                int daysoutput = Days.daysBetween(datestartdaytime, datestartdaytime).getDays() % 30;
                int hoursoutput = Hours.hoursBetween(datestartdaytime, datestartdaytime).getHours() % 24;
                int minutsoutput = Minutes.minutesBetween(datestartdaytime, dateenddaytime).getMinutes() % 60;
                int secondsoutput = Seconds.secondsBetween(datestartdaytime, dateenddaytime).getSeconds() % 60;

                answer.setText(monthoutput + "Months" + daysoutput + "Days" + hoursoutput + "Hours" + minutsoutput + "Minutes" + secondsoutput + "Seconds");

Thanks a lot :)

回答1:

Your bug is in these two lines:

            int daysoutput = Days.daysBetween(datestartdaytime, datestartdaytime).getDays() % 30;
            int hoursoutput = Hours.hoursBetween(datestartdaytime, datestartdaytime).getHours() % 24;

You intended to use dateenddaytime as the second argument:

            int daysoutput = Days.daysBetween(datestartdaytime, dateenddaytime).getDays() % 30;
            int hoursoutput = Hours.hoursBetween(datestartdaytime, dateenddaytime).getHours() % 24;

来源：https://stackoverflow.com/questions/52838660/i-am-getting-wrong-time-between-two-dates-in-joda-time