get Date By Year And Month - Java java.util

Java examples for java.util:Month

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Description

get Date By Year And Month

Demo Code


//package com.java2s;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;

public class Main {
    public static void main(String[] argv) throws Exception {
        int year = 2;
        int month = 2;
        System.out.println(getDateByYearAndMonth(year, month));
    }/*from   w w w .j a  v a  2s .  com*/

    private static final String DEFAULT_FORMAT = "yyyy-MM-dd";

    public static Date getDateByYearAndMonth(int year, int month) {
        if (year <= 0 || month <= 0) {
            return null;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.YEAR, year);
        calendar.set(Calendar.MONTH, month);
        calendar.add(Calendar.MONTH, -1);
        String dateFormat = "yyyy-MM-dd HH:mm:ss";
        return formatDate(dateFormat, calendar.getTime());
    }

    private static Date formatDate(String format, Date date) {
        SimpleDateFormat formater = new SimpleDateFormat();
        formater.applyPattern(format);
        formater.setLenient(false);
        try {
            return formater.parse(formater.format(date));
        } catch (ParseException e) {
            return now();
        }
    }

    public static String format(Date date) {
        return format(DEFAULT_FORMAT, date);
    }

    public static String format(String format, Date date) {
        if (date == null) {
            return "";
        }
        SimpleDateFormat formater = new SimpleDateFormat();
        formater.applyPattern(format);
        return formater.format(date);
    }

    public static Date now() {
        return new Date();
    }

    public static Date now(String format) {
        return formatDate(format, now());
    }
}

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