CalendarUtils.java

package com.jasonrobinson.racer.util;

import java.util.Calendar;
import java.util.Locale;

public class CalendarUtils {

    private CalendarUtils() {

    }

    public static boolean isToday(Calendar cal) {

        Calendar today = Calendar.getInstance(Locale.getDefault());

        return cal.get(Calendar.DAY_OF_YEAR) == today.get(Calendar.DAY_OF_YEAR) && cal.get(Calendar.YEAR) == today.get(Calendar.YEAR);
    }

    public static boolean isTomorrow(Calendar cal) {

        Calendar tomorrow = Calendar.getInstance(Locale.getDefault());
        tomorrow.roll(Calendar.DAY_OF_YEAR, true);

        return cal.get(Calendar.DAY_OF_YEAR) == tomorrow.get(Calendar.DAY_OF_YEAR) && cal.get(Calendar.YEAR) == tomorrow.get(Calendar.YEAR);
    }

    public static boolean isYesterday(Calendar cal) {

        Calendar yesterday = Calendar.getInstance(Locale.getDefault());
        yesterday.roll(Calendar.DAY_OF_YEAR, false);

        return cal.get(Calendar.DAY_OF_YEAR) == yesterday.get(Calendar.DAY_OF_YEAR) && cal.get(Calendar.YEAR) == yesterday.get(Calendar.YEAR);
    }
}