Java Data Type How to - Get Last Friday of Month

Question

We would like to know how to get Last Friday of Month.

Answer

import java.text.SimpleDateFormat;
import java.util.Calendar;
//from  w w  w.  j ava 2s  .  com
public class Main {

  public static Calendar getLastFriday(Calendar cal, int offset) {
    int dayofweek;
    cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) + offset);
    cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
    dayofweek = cal.get(Calendar.DAY_OF_WEEK); 
    if (dayofweek < Calendar.FRIDAY) 
      cal.set(Calendar.DAY_OF_MONTH, cal.get(Calendar.DAY_OF_MONTH) - 7
          + Calendar.FRIDAY - dayofweek);
    else
      cal.set(Calendar.DAY_OF_MONTH, cal.get(Calendar.DAY_OF_MONTH)
          + Calendar.FRIDAY - dayofweek);

    return cal;
  }

  public static String getLastFridayofMonth(int offset) { 
    final String DATE_FORMAT_NOW = "dd-MMM-yyyy";
    Calendar cal = Calendar.getInstance();
    SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW);
    cal = getLastFriday(cal, offset);
    return sdf.format(cal.getTime());
  }

  public static void main(String[] args) {
    System.out.println(getLastFridayofMonth(0)); // 0 = current month
    System.out.println(getLastFridayofMonth(1));// 1=next month
    System.out.println(getLastFridayofMonth(2));// 2=month after next month
    System.out.println(getLastFridayofMonth(3));
  }

}

The code above generates the following result.