Java Hour Calculate isValidTime(int hour, int minute, boolean ampm)

Description

is Valid Time

License

Open Source License

Declaration

public static boolean isValidTime(int hour, int minute, boolean ampm) 

Method Source Code

//package com.java2s;
/*//  w  w  w  . j ava2 s .c om
 * CONFIDENTIAL AND PROPRIETARY SOURCE CODE OF
 * Institute of Systems Science, National University of Singapore
 *
 * Copyright 2012 Team 4(Part-Time), ISS, NUS, Singapore. All rights reserved.
 * Use of this source code is subjected to the terms of the applicable license
 * agreement.
 *
 * -----------------------------------------------------------------
 * REVISION HISTORY
 * -----------------------------------------------------------------
 * DATE             AUTHOR          REVISION      DESCRIPTION
 * 10 March 2012    Chen Changfeng   0.1            Class creating
 *                                        
 *                                        
 *                                        
 *                                        
 * 
 */

import java.text.SimpleDateFormat;
import java.util.*;

public class Main {
    private static String dateFormat = "dd/MM/yyyy";
    private static String time12HrFormat = "hh:mm aa";

    public static boolean isValidTime(int hour, int minute, boolean ampm) {

        if (minute < 0 || minute > 59)
            return false;

        if (ampm && (hour < 1 || hour > 12))
            return false;

        else if (hour < 0 || hour > 23)
            return false;

        else
            return true;
    }

    /**
     * Tests the input string to ensure that a valid time can be created
     * according to the 12 Hr time format in the System property.
     * <p>
     * If the properties file is not available or the timeformat property has
     * not been specified, the default 12 Hr format "hh:mm aa" will be used.
     * <p>
     * @param  time The time string.
     * @return True if it conforms to the system time format; False otherwise.
     */
    public static boolean isValidTime(String time) {

        if (time == null)
            return false;

        String timeformat = null;

        // Use the default format of "hh:mm aa".
        timeformat = time12HrFormat;

        try {
            parse(time, timeformat);
        } catch (java.text.ParseException e) {
            return false;
        }

        return true;
    }

    /**
     * Tests the input string to ensure that a valid time can be created
     * according to the time format provided.
     * <p>
     * @param  time   The time string.
     * @param  format Time format to conform to.
     * @return True if it conforms to the specified time format; False otherwise.
     */
    public static boolean isValidTime(String time, String format) {

        if (time == null || format == null)
            return false;

        try {
            parse(time, format);
        } catch (java.text.ParseException e) {
            return false;
        }

        return true;
    }

    /**
     * Returns a Date object instance from the input string.
     * The input string is parsed to return a date object based
     * on the date format specified in the System property.
     * <p>
     * @param  date The date string.
     * @return The date instance created.
     * @throws java.text.ParseException  - if the beginning of the specified string cannot be parsed.
     */
    public static Date parse(String date) throws java.text.ParseException {
        // Modified by Aris on 02/02/2009 for case 1296351
        //if ( date == null || date.length()==0) return null;
        if (date == null)
            return null;

        String dateformat = null;
        // Use the default format of "dd/MM/yyyy".
        dateformat = dateFormat;

        return parse(date, dateformat);
    }

    /**
     * Returns a Date object instance from the input string.
     * The input date string is parsed to return a date object
     * based on the format provided.
     * <p>
     * Eg., to parse the date string "01/01/2003 9:2 PM", use the
     * format "dd/MM/yyyy h:m a". The resultant data object will have
     * the value "Mar 11 2003 09:02", as displayed in 24 hr format.
     * <p>
     * @param  date   The date string.
     * @param  format The date format that the date string conforms to.
     * @return The date instance created.
     * @throws java.text.ParseException  - if the beginning of the specified string cannot be parsed.
     */
    public static Date parse(String date, String format)
            throws java.text.ParseException {
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        sdf.setLenient(false);

        return sdf.parse(date);
    }
}

Related

1. getTimeStringOfHourBefore(int hour)
2. getTomorrowSixHours()
3. getWeeHours()
4. hoursMinsSecsFromMs(long ms)
5. isHourMinute(String str)
6. isValidTime(int hour, int minute, boolean ampm)
7. parseDate(String date, String hours)
8. plusHour(int hour)
9. plusHour(String dateStr, int hour)