Java Date Add addDate(int field, int amount)

Description

add Date

License

Apache License

Declaration

public static String addDate(int field, int amount) 

Method Source Code

//package com.java2s;
/*//from  ww  w  . j a v  a 2  s .c  om
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

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

import java.util.TimeZone;

public class Main {

    public static String addDate(int field, int amount) {
        int temp = 0;
        if (field == 1) {
            temp = Calendar.YEAR;
        }
        if (field == 2) {
            temp = Calendar.MONTH;
        }
        if (field == 3) {
            temp = Calendar.DATE;
        }

        String Time = "";
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            Calendar cal = Calendar.getInstance(TimeZone.getDefault());
            cal.add(temp, amount);
            Time = sdf.format(cal.getTime());
            return Time;
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * Adds to a date returning a new object. The original date object is
     * unchanged.
     * 
     * @param date
     *            the date, not null
     * @param calendarField
     *            the calendar field to add to
     * @param amount
     *            the amount to add, may be negative
     * @return the new date object with the amount added
     * @throws IllegalArgumentException
     *             if the date is null
     * @deprecated Will become privately scoped in 3.0
     */
    public static Date add(Date date, int calendarField, int amount) {
        if (date == null) {
            throw new IllegalArgumentException("The date must not be null");
        }
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        c.add(calendarField, amount);
        return c.getTime();
    }
}

Related

1. addDate(Date date, int field, int add)
2. addDate(Date date, int k)
3. addDate(Date date, int noOfDays)
4. addDate(Date date, int years, int months, int days)
5. addDate(Date date, String unit, int quantity)
6. addDate(java.util.Date date, int day)
7. addDate(String date)
8. addDate(String date, int amount)
9. addDate(String date, String type, int into)