is Calendar Today - Java java.util

Java examples for java.util:Day

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Description

is Calendar Today

Demo Code

/*******************************************************************************
 * Copyright (c) 2004, 2009 Tasktop Technologies and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:/*from   w  w  w  .j ava  2  s  .c  om*/
 *     Tasktop Technologies - initial API and implementation
 *******************************************************************************/
import java.util.Calendar;
import java.util.Date;

public class Main{
    public static void main(String[] argv) throws Exception{
        Calendar time = Calendar.getInstance();
        System.out.println(isToday(time));
    }
    private static int startDay = Calendar.MONDAY;
    public static boolean isToday(Calendar time) {
        if (time != null) {
            Calendar dayStart = getCalendar();
            snapStartOfDay(dayStart);
            Calendar midnight = getCalendar();
            snapEndOfDay(midnight);
            return (time.compareTo(dayStart) >= 0 && time
                    .compareTo(midnight) <= 0);
        }
        return false;
    }
    public static boolean isToday(DateRange time) {
        if (time != null) {
            return getCurrentWeek().getToday().compareTo(time) == 0;
        }
        return false;
    }
    public static Calendar getCalendar() {
        Calendar cal = Calendar.getInstance();
        cal.setFirstDayOfWeek(startDay);
        cal.getTime();
        return cal;
    }
    public static Calendar snapStartOfDay(Calendar cal) {
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
        cal.getTime();
        return cal;
    }
    public static Calendar snapEndOfDay(Calendar cal) {
        cal.set(Calendar.HOUR_OF_DAY,
                cal.getActualMaximum(Calendar.HOUR_OF_DAY));
        cal.set(Calendar.MINUTE, cal.getActualMaximum(Calendar.MINUTE));
        cal.set(Calendar.SECOND, cal.getActualMaximum(Calendar.SECOND));
        cal.set(Calendar.MILLISECOND,
                cal.getActualMaximum(Calendar.MILLISECOND));
        cal.getTime();
        return cal;
    }
    public static WeekDateRange getCurrentWeek() {
        Calendar weekStart = getCalendar();
        snapStartOfWorkWeek(weekStart);
        Calendar weekEnd = getCalendar();
        snapEndOfWeek(weekEnd);
        return new WeekDateRange(weekStart, weekEnd);
    }
    public static Calendar snapStartOfWorkWeek(Calendar cal) {
        cal.set(Calendar.DAY_OF_WEEK, startDay);
        snapStartOfDay(cal);
        return cal;
    }
    public static Calendar snapEndOfWeek(Calendar cal) {

        cal.set(Calendar.DAY_OF_WEEK, getLastDayOfWeek(cal));

        snapEndOfDay(cal);
        return cal;
    }
    public static int getLastDayOfWeek(Calendar cal) {
        int last = cal.getFirstDayOfWeek() - 1;

        if (last == 0) {
            last = Calendar.SATURDAY;
        }

        return last;
    }
}

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