Java SQL Date getEndWeekDayOfMonth(String year, String month)

Description

get End Week Day Of Month

License

Apache License

Declaration

public static List getEndWeekDayOfMonth(String year, String month) 

Method Source Code

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

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.List;

public class Main {
    /** The Constant MONTH. */
    public final static String[] MONTH = { "January", "February", "March", "April", "May", "June", "July", "August",
            "September", "October", "November", "December" };

    public static List getEndWeekDayOfMonth(String year, String month) {
        List list = new ArrayList();
        String date = "";
        int days = daysInMonth(year, month);
        int weekday = 0;
        for (int i = 1; i <= days; i++) {
            weekday = getWeekOfMonth(year, month, String.valueOf(i));
            if (weekday == 5) {
                if (i < 10) {
                    list.add(year + month + "0" + String.valueOf(i));
                } else {
                    list.add(year + month + String.valueOf(i));
                }//from  w  w w  .j  a v  a  2  s . co m
            }
        }
        for (int i = 0; i < list.size(); i++) {
            System.out.println("end week list[" + i + "]:" + list.get(i));
        }

        return list;
    }

    public static int daysInMonth(String argYear, String argMonth) {
        int year = Integer.parseInt(argYear);
        int month = Integer.parseInt(argMonth);

        GregorianCalendar c = new GregorianCalendar(year, month, 0);
        int[] daysInMonths = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
        daysInMonths[1] += c.isLeapYear(c.get(GregorianCalendar.YEAR)) ? 1 : 0;
        return daysInMonths[c.get(GregorianCalendar.MONTH)];
    }

    public static int getWeekOfMonth(String year, String month, String day) {
        java.sql.Date myDate = getDate(year, month, day);
        int index = 0;
        try {
            Calendar cal = Calendar.getInstance();
            cal.setTime(myDate);
            index = cal.get(Calendar.DAY_OF_WEEK);
            if (index <= 1) {
                index = 7;
            } else {
                index = index - 1;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return index;

    }

    /**
     * Adds the specified (signed) amount of time to the given time field, based
     * on the calendar's rules.
     * 
     * @param date
     *            the date
     * @param field
     *            the field
     * @param amount
     *            the amount
     * @return the date
     */
    public static Date add(Date date, int field, long amount) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(field, (int) amount);
        return calendar.getTime();
    }

    public static java.sql.Date getDate(String year, String month, String day) {
        java.sql.Date result = null;
        try {
            String str = year + "-" + month + "-" + day;
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
            java.util.Date date1 = dateFormat.parse(str);
            result = new java.sql.Date(date1.getTime());
        } catch (Exception e) {
            System.out.println("Exception " + e);
        }
        return result;
    }
}

Related

1. getClasses()
2. getCurrDay()
3. getCurrentYear()
4. getDayOfPerMonth(String theDataStr)
5. getDiffDays(String begin_dt, String end_dt)
6. getFileName()
7. getFirstDayOfNextMonth()
8. getFirstDayOfThisMonth()
9. getInsertarEmpleado()