Java Calendar Day toCountWorkDays(GregorianCalendar start, GregorianCalendar end)

Description

to Count Work Days

License

Apache License

Declaration

public static long toCountWorkDays(GregorianCalendar start, GregorianCalendar end) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

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

public class Main {
    private Calendar calendar;
    private static final String COLON = ":";
    private static final String ZERO = "0";

    public static long toCountWorkDays(GregorianCalendar start, GregorianCalendar end) {
        long result = 0;
        GregorianCalendar startDate = new GregorianCalendar();
        GregorianCalendar endDate = new GregorianCalendar();

        startDate.setTime(start.getTime());
        endDate.setTime(end.getTime());//from  w  w w  . ja  v  a 2s  .  c om
        if ((startDate.get(GregorianCalendar.DAY_OF_WEEK) % 7) <= 1) {
            startDate.add(GregorianCalendar.DATE, 2 - (startDate.get(GregorianCalendar.DAY_OF_WEEK) % 7));
        }
        if ((endDate.get(GregorianCalendar.DAY_OF_WEEK) % 7) <= 1) {
            endDate.add(GregorianCalendar.DATE, -1 - (endDate.get(GregorianCalendar.DAY_OF_WEEK) % 7));
        }
        long totaldays = toDayInterval(startDate, endDate);
        int s = endDate.get(GregorianCalendar.DAY_OF_WEEK) - startDate.get(GregorianCalendar.DAY_OF_WEEK);
        if (s < 0) {
            s += 5;
        }
        if (totaldays % 7 != 0)
            result = s + (totaldays / 7) * 5 + 1;
        else
            result = (totaldays / 7) * 5;

        if (result < 0) {
            result = 0;
        }
        return result;
    }

    public String getTime() {
        return getHour() + COLON + getMinute();
    }

    public static long toDayInterval(Date startDate, Date endDate) {
        return (endDate.getTime() - startDate.getTime()) / 86400000;
    }

    public static long toDayInterval(GregorianCalendar startDate, GregorianCalendar endDate) {
        return (endDate.getTimeInMillis() - startDate.getTimeInMillis()) / 86400000;

    }

    public int getHour() {
        return calendar.get(Calendar.HOUR_OF_DAY);
    }

    public String getMinute() {
        int tempMinute = calendar.get(Calendar.MINUTE);
        return tempMinute < 10 ? ZERO + tempMinute : Integer.toString(tempMinute);
    }

    public long getTimeInMillis() {
        return calendar.getTimeInMillis();
    }
}

Related

1. setStartTimeOfDay(Calendar calender)
2. setToBeginningOfDay(Calendar cal)
3. setToStartOfDay(Calendar start)
4. setToStartTimeOfTheDay(Calendar c)
5. startOfDay(Calendar calendar)
6. todayCalendar()
7. toEndOfDayCalendar(Date date)
8. toNextWorkDay(Calendar cal)
9. trimToDay(Calendar calendar)