Java Hour Calculate addHours(int date, int hours)

Description

add Hours

License

Apache License

Declaration

public static String addHours(int date, int hours) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class Main {

    public static String addHours(int date, int hours) {
        try {/*  ww w  .ja  v  a 2 s . c o  m*/
            SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
            Calendar cd = Calendar.getInstance();
            cd.setTime(format.parse(String.valueOf(date)));
            cd.add(Calendar.HOUR_OF_DAY, hours);
            return format.format(cd.getTime());
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    public static String addHours(String date, int hours, String pattern) {
        try {
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
            Calendar cd = Calendar.getInstance();
            cd.setTime(format.parse(date));
            cd.add(Calendar.HOUR_OF_DAY, hours);
            return new SimpleDateFormat(pattern).format(cd.getTime());
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    public static Date add(int days) {
        Calendar now = Calendar.getInstance();
        now.add(Calendar.DAY_OF_YEAR, days);
        return now.getTime();
    }

    public static String add(int days, String pattern) {
        Date date = add(days);
        SimpleDateFormat format = new SimpleDateFormat(pattern);
        return format.format(date);
    }

    public static String add(int date, int days) {
        try {
            SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
            Calendar cd = Calendar.getInstance();
            cd.setTime(format.parse(String.valueOf(date)));
            cd.add(Calendar.DAY_OF_YEAR, days);
            return format.format(cd.getTime());
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }

    public static String add(String date, int days, String pattern) {
        try {
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
            Calendar cd = Calendar.getInstance();
            cd.setTime(format.parse(date));
            cd.add(Calendar.DAY_OF_YEAR, days);
            return new SimpleDateFormat(pattern).format(cd.getTime());
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }
}

Related

1. addHour(String now)
2. addNHours(Date date, int hours)
3. diffHour(String day1, String day2)
4. getBothTime(String startTime, int hours)
5. getCurrHourDate()