Checks whether the given hour, minute and second combination is a valid time or not. - Java java.util

Description

Checks whether the given hour, minute and second combination is a valid time or not.

Demo Code

//package com.java2s;
import java.util.Calendar;

public class Main {
    public static void main(String[] argv) throws Exception {
        int hour = 2;
        int minute = 2;
        int second = 2;
        System.out.println(isValidTime(hour, minute, second));
    }//from   w w w  . j a v a 2 s  .co m

    /**
     * Checks whether the given hour, minute and second combination is a valid
     * time or not.
     * 
     * @param hour
     *            The hour part of the time.
     * @param minute
     *            The minute part of the time.
     * @param second
     *            The second part of the time.
     * @return True if the given hour, minute and second combination is a valid
     *         time.
     */
    public static boolean isValidTime(int hour, int minute, int second) {
        return isValidDate(1, 1, 1, hour, minute, second);
    }

    /**
     * Checks whether the given day, month and year combination is a valid date
     * or not.
     * 
     * @param year
     *            The year part of the date.
     * @param month
     *            The month part of the date.
     * @param day
     *            The day part of the date.
     * @return True if the given day, month and year combination is a valid
     *         date.
     */
    public static boolean isValidDate(int year, int month, int day) {
        return isValidDate(year, month, day, 0, 0, 0);
    }

    /**
     * Checks whether the given day, month, year, hour, minute and second
     * combination is a valid date or not.
     * 
     * @param year
     *            The year part of the date.
     * @param month
     *            The month part of the date.
     * @param day
     *            The day part of the date.
     * @param hour
     *            The hour part of the date.
     * @param minute
     *            The minute part of the date.
     * @param second
     *            The second part of the date.
     * @return True if the given day, month, year, hour, minute and second
     *         combination is a valid date.
     */
    public static boolean isValidDate(int year, int month, int day,
            int hour, int minute, int second) {
        try {
            getValidCalendar(year, month, day, hour, minute, second);
            return true;
        } catch (IllegalArgumentException e) {
            return false;
        }
    }

    /**
     * Validate the actual date of the given date elements and returns a
     * calendar instance based on the given date elements. The time is forced to
     * 00:00:00.
     *
     * @param year The year part of the date.
     * @param month The month part of the date.
     * @param day The day part of the date.
     * @return A Calendar instance prefilled with the given date elements.
     */
    public static Calendar getValidCalendar(int year, int month, int day) {
        return getValidCalendar(year, month, day, 0, 0, 0);
    }

    /**
     * Validate the actual date of the given date elements and returns a
     * calendar instance based on the given date elements.
     *
     * @param year The year part of the date.
     * @param month The month part of the date.
     * @param day The day part of the date.
     * @param hour The hour part of the date.
     * @param minute The minute part of the date.
     * @param second The second part of the date.
     * @return A Calendar instance prefilled with the given date elements.
     */
    public static Calendar getValidCalendar(int year, int month, int day,
            int hour, int minute, int second) {
        Calendar calendar = Calendar.getInstance();
        calendar.clear();
        calendar.setLenient(false); // Don't automatically convert invalid date.
        calendar.set(year, month - 1, day, hour, minute, second);
        calendar.getTimeInMillis(); // Lazy update, throws
        // IllegalArgumentException if invalid date.
        return calendar;
    }
}

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