return date for a given week number in a month

[Graham Thorpe]

Hi,

Can someone urgently post a snippet code that will return the date if the week number and the weekday (like wednesday) for a given month in an year is passed.

ex: If I say 2nd wednesday of August in 2004 , it must return the date for second wednesday. URGENT

[Peter den Haan]

Simple. Use a Calendar. Set the YEAR to 2004, MONTH to AUGUST, the DAY_OF_WEEK_IN_MONTH to 2, and the DAY_OF_WEEK to WEDNESDAY. Get the time, done.

If this confuses you, you might want to study the differences between WEEK_OF_MONTH and DAY_OF_WEEK_IN_MONTH.

- Peter
[ August 23, 2004: Message edited by: Peter den Haan ]

[somkiat puisungnoen]

More detail of Calendar

day, month and year are start with ZERO (0) so

day : 0 - 30 (1-31)
month : 0-11 (1-12)
year : 2003 (2004)

[Ko Ko Naing]

Despite the bugs that might occur, I just developed a small application to clearly see what we have here... Hope this helps...

import java.util.*;
 
public class Exec {
  public static void main(String[] args) {
    try {
      int day_of_week;
 
      if (args[3].equalsIgnoreCase("Sunday")) {
        day_of_week = 1;
      } else if (args[3].equalsIgnoreCase("Monday")) {
        day_of_week = 2;
      } else if (args[3].equalsIgnoreCase("Tuesday")) {
        day_of_week = 3;
      } else if (args[3].equalsIgnoreCase("Wednesday")) {
        day_of_week = 4;
      } else if (args[3].equalsIgnoreCase("Thursday")) {
        day_of_week = 5;
      } else if (args[3].equalsIgnoreCase("Friday")) {
        day_of_week = 6;
      } else if (args[3].equalsIgnoreCase("Saturday")) {
        day_of_week = 7;
      }
        
      Calendar cal = new GregorianCalendar();
      cal.set(Calendar.YEAR, Integer.parseInt(args[0]));
      cal.set(Calendar.MONTH, Integer.parseInt(args[1]) - 1);
      cal.set(Calendar.WEEK_OF_MONTH, Integer.parseInt(args[2]));
      cal.set(Calendar.DAY_OF_WEEK, day_of_week);
 
      System.out.println(cal.getTime().toString());
    } catch (Exception e) {
      System.out.println("Usage : java Exec <year> <month> <week of month> <day of week in name>");
      System.out.println("For example : java Exec 2004 8 3 Wednesday");
    }
  }
}