Java Date to Year getYearMonthOfLastMon(Date date)

Description

get Year Month Of Last Mon

License

Apache License

Declaration

public static String getYearMonthOfLastMon(Date date) 

Method Source Code

//package com.java2s;
/*// w  ww .j a  va2s  . com
 * 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.util.Calendar;
import java.util.Date;

import java.util.TimeZone;

public class Main {

    public static String getYearMonthOfLastMon(Date date) {
        Date newdate = getInternalDateByMon(date, -1);
        String year = String.valueOf(getYear(newdate));
        String month = String.valueOf(getMonth(newdate));
        return year + month;
    }

    public static Date getInternalDateByMon(Date d, int months) {
        Calendar now = Calendar.getInstance(TimeZone.getDefault());
        now.setTime(d);
        now.add(Calendar.MONTH, months);
        return now.getTime();
    }

    public static int getYear(Date date) {
        Calendar now = Calendar.getInstance(TimeZone.getDefault());
        now.setTime(date);
        return now.get(Calendar.YEAR);
    }

    public static int getMonth(Date date) {
        Calendar now = Calendar.getInstance(TimeZone.getDefault());
        now.setTime(date);
        return now.get(Calendar.MONTH) + 1;
    }

    /**
     * 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. getYearFromDate(Date date)
2. getYearMonth(Date date)
3. getYearMonthDay(Date date)
4. getYearMonthDay(Date date)
5. getYearMonthInt(Date date)
6. getYearNumber(Date date)
7. getYearOfDate(Date date)
8. getYearOfThisYear(Date currentdate)
9. getYearOnlyDate(String year)