Java: How do I get the date of x day in a month ( e.g. Third Monday in February 2012)

Question

I am somewhat struggling with this.

I want to setup my Calendar to let\'s say: Third Monday in February 2012. And I didn\'t find any way of doing th

Answer 1

Any chances you are using Quartz scheduler?

public Date date(String cronExpression) {
    return new org.quartz.CronExpression(cronExpression).
        getNextValidTimeAfter(new Date(0));
}

System.out.println(date("0 0 0 ? May Thu#3 2015"));
System.out.println(date("0 0 0 ? Jun Mon#1 2050"));
System.out.println(date("0 0 0 ? Dec Tue#4 2012"));
System.out.println(date("0 0 0 ? Jul Wed#2 2000"));

This simple code prints correct (?) results:

Thu May 21 00:00:00 CEST 2015
Mon Jun 06 00:00:00 CEST 2050
Tue Dec 25 00:00:00 CET 2012
Wed Jul 12 00:00:00 CEST 2000

The required CronExpression doesn't have any dependencies on the rest of Quartz, so you might consider copying it to your project (watch out for license!)

Side note: the internal implementation of getNextValidTimeAfter() is 400 lines of code...