2つのJavaの例は、経過時間を日、時間、分、秒の形式で表示する方法を示しています。

1.標準JDKの日付API

経過時間を手動で計算する必要があります。

DateTimeUtils.java 

package com.mkyong.dateUtils;

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

public class DateTimeUtils {

    public static void main(String[]args) {

      DateTimeUtils obj = new DateTimeUtils();
      SimpleDateFormat simpleDateFormat =
                new SimpleDateFormat("dd/M/yyyy hh:mm:ss");

      try {

        Date date1 = simpleDateFormat.parse("10/10/2013 11:30:10");
        Date date2 = simpleDateFormat.parse("13/10/2013 20:35:55");

        obj.printDifference(date1, date2);

      } catch (ParseException e) {
        e.printStackTrace();
      }

    }

   //1 minute = 60 seconds
   //1 hour = 60 x 60 = 3600
   //1 day = 3600 x 24 = 86400
    public void printDifference(Date startDate, Date endDate){

       //milliseconds
        long different = endDate.getTime() - startDate.getTime();

        System.out.println("startDate : " + startDate);
        System.out.println("endDate : "+ endDate);
        System.out.println("different : " + different);

        long secondsInMilli = 1000;
        long minutesInMilli = secondsInMilli **  60;
        long hoursInMilli = minutesInMilli **  60;
        long daysInMilli = hoursInMilli **  24;

        long elapsedDays = different/daysInMilli;
        different = different % daysInMilli;

        long elapsedHours = different/hoursInMilli;
        different = different % hoursInMilli;

        long elapsedMinutes = different/minutesInMilli;
        different = different % minutesInMilli;

        long elapsedSeconds = different/secondsInMilli;

        System.out.printf(
            "%d days, %d hours, %d minutes, %d seconds%n",
            elapsedDays,
            elapsedHours, elapsedMinutes, elapsedSeconds);

    }

}

出力 

startDate : Thu Oct 10 11:30:10 SGT 2013
endDate : Sun Oct 13 20:35:55 SGT 2013
different : 291945000
3 days, 9 hours, 5 minutes, 45 seconds

2. Joda時間の例

Joda-timeは、Javaの日時ライブラリを使用し、経過時間を計算するためのAPIを含み、年、月、日、時、分、秒の形式で取得します。

DateTimeUtils.java 

package com.mkyong.dateUtils;

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

import org.joda.time.Interval;
import org.joda.time.Period;

public class DateTimeUtils {

    public static void main(String[]args) {

      DateTimeUtils obj = new DateTimeUtils();
      SimpleDateFormat simpleDateFormat =
               new SimpleDateFormat("dd/M/yyyy hh:mm:ss");

      try {

        Date date1 = simpleDateFormat.parse("10/10/2013 11:30:10");
        Date date2 = simpleDateFormat.parse("13/11/2014 20:35:55");

        obj.printDifference(date1, date2);

      } catch (ParseException e) {
        e.printStackTrace();
      }

    }

    public void printDifference(Date startDate, Date endDate){

      Interval interval =
               new Interval(startDate.getTime(), endDate.getTime());
      Period period = interval.toPeriod();

          System.out.printf(
           "%d years, %d months, %d days, %d hours, %d minutes, %d seconds%n",
           period.getYears(), period.getMonths(), period.getDays(),
           period.getHours(), period.getMinutes(), period.getSeconds());

    }
}

出力 

1 years, 1 months, 3 days, 9 hours, 5 minutes, 45 seconds

参考文献


  1. http://docs.oracle.com/javase/6/docs/api/java/util/Date.html

    [Java Date

API]。

Joda-Time – Javaの日時API

  1. リンク://java/how-to-calculate-elapsed-execution-in-java/[How To

Javaでの経過時間/実行時間の計算]

リンク://タグ/日付/[日付]リンク://タグ/joda-time/[joda-time]