How do you get a set of time marks every half a second?

[Bogopo]

There's a need, a set of time marks, every half seconds.

How do you do that?

I mean, the mass should contain lines of this kind of "18:20:53.500."

172,800 lines last 24 hours.

public class ArrayOfTimeLabels 
{
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) 
    {
        // TODO code application logic here
    }
List<String> getDataX() 
{
    List<String> data = new CopyOnWriteArrayList();
    return data;
}

}

To better understand that I want that DataGenerator.

He's the only one starting to work from now on.

import java.text.ParseException;

import java.text.SimpleDateFormat;

import java.util.List;

import java.util.Date;

import java.util.concurrent.CopyOnWriteArrayList;

/**

*


@author ALEXANDER

*/

public class DataGenerator {

static SimpleDateFormat sdf;

static Date date = null;
static List<Date> getListDate(int numPoints) throws ParseException {

//System.out.println(sdf.format(date));

//sdf = new SimpleDateFormat("HH:mm:ss");
 //List&lt;Date&gt; data = new CopyOnWriteArrayList&lt;Date&gt;();
 List&lt;Date&gt; data = new CopyOnWriteArrayList();
 
 for (int i = 0; i &lt; numPoints; i++) {
     sdf = new SimpleDateFormat("HH:mm:ss.S");
     Date now = new Date();
     String strDate = sdf.format(now);
     System.err.println(strDate);
     data.add(sdf.parse(strDate));
 }
 return data;

}
static List<Double> getListRandomData(int numPoints) {
 List&lt;Double&gt; data = new CopyOnWriteArrayList&lt;Double&gt;();
 for (int i = 0; i &lt; numPoints; i++) {
     data.add(Math.random() * 100);
     }
 return data;

}

}

[chanisef]

truncateTo in this case will cut everything until today, and you'll be able to have the current day with the time of "00:00.000."

Instant instant = Instant.now().truncatedTo(ChronoUnit.DAYS);
for (int i = 0; i < 172800; i++) {
   instant = instant.plus(500, ChronoUnit.MILLIS);
   saveFormattedInstant(instant);
}