floor Calendar - Java java.util

Java examples for java.util:Calendar Calculation

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Description

floor Calendar

Demo Code


//package com.java2s;

import java.util.Calendar;

public class Main {
    public static void main(String[] argv) throws Exception {
        Calendar calendar = Calendar.getInstance();
        int field = 2;
        floor(calendar, field);/*from w w w  .j  av  a 2s .  c  o m*/
    }

    public static void floor(Calendar calendar, int field) {
        floor(calendar, field, 1);
    }

    public static void floor(Calendar calendar, int field, int number) {
        switch (field) {
        case Calendar.YEAR:
            yearFloor(calendar);
            break;
        case Calendar.MONTH:
            monthFloor(calendar, number);
            break;
        case Calendar.WEEK_OF_YEAR:
            weekFloor(calendar);
            break;
        case Calendar.DAY_OF_WEEK:
            dayFloor(calendar);
            break;
        case Calendar.DAY_OF_MONTH:
            dayFloor(calendar);
            break;
        case Calendar.HOUR_OF_DAY:
            hourFloor(calendar, number);
            break;
        case Calendar.MINUTE:
            minuteFloor(calendar, number);
            break;
        case Calendar.SECOND:
            secondFloor(calendar);
            break;
        }
    }

    public static void yearFloor(Calendar calendar) {
        monthFloor(calendar);
        calendar.set(Calendar.MONTH, 0);
    }

    public static void monthFloor(Calendar calendar) {
        dayFloor(calendar);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
    }

    public static void monthFloor(Calendar calendar, int number) { //number param for quarter and half
        dayFloor(calendar);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        if (number > 1) {
            int month = calendar.get(Calendar.MONTH);
            calendar.set(Calendar.MONTH, (month / number) * number);
        }
    }

    public static void weekFloor(Calendar calendar) {
        int i = calendar.get(Calendar.YEAR);
        int k = calendar.get(Calendar.DAY_OF_YEAR);
        int l = calendar.get(Calendar.DAY_OF_WEEK);
        int i1 = calendar.getFirstDayOfWeek();
        int j1 = l - i1;
        if (j1 > 0) {
            k -= j1;
        } else if (j1 < 0) {
            k -= 7 + j1;
        }
        calendar.clear();
        boolean flag = calendar.isLenient();
        if (!flag) {
            calendar.setLenient(true);
        }
        calendar.set(Calendar.YEAR, i);
        calendar.set(Calendar.DAY_OF_YEAR, k);
        if (!flag) {
            int j = calendar.get(Calendar.YEAR);
            calendar.setLenient(false);
        }
    }

    public static void dayFloor(Calendar calendar) {
        hourFloor(calendar);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
    }

    public static void hourFloor(Calendar calendar) {
        minuteFloor(calendar);
        calendar.set(Calendar.MINUTE, 0);
    }

    public static void hourFloor(Calendar calendar, int number) {
        minuteFloor(calendar);
        calendar.set(Calendar.MINUTE, 0);
        if (number > 1) {
            int hours = calendar.get(Calendar.HOUR);
            calendar.set(Calendar.HOUR, (hours / number) * number);
        }
    }

    public static void minuteFloor(Calendar calendar) {
        secondFloor(calendar);
        calendar.set(Calendar.SECOND, 0);
    }

    public static void minuteFloor(Calendar calendar, int number) {
        secondFloor(calendar);
        calendar.set(Calendar.SECOND, 0);
        if (number > 1) {
            int minutes = calendar.get(Calendar.SECOND);
            calendar.set(Calendar.SECOND, (minutes / number) * number);
        }
    }

    public static void secondFloor(Calendar calendar) {
        calendar.set(Calendar.MILLISECOND, 0);
    }
}

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