24 hours in simpledateformat() and milliseconds in Java

I'm building a DAQ software, and now I'm creating a log file I want to display the time on each item A simple code (unable to compile) is as follows

import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

public class daq(){

    SimpleDateFormat Now = new SimpleDateFormat("hh:mm:ss");

    public void go(){
        report.setProperty("INSERT","["+Now.format(new Date())+"] Acquisition Started\n");
    }
    public void init(){
        report.setProperty("INSERT","["+Now.format(new Date())+"] ADC Channel 1: Read Complete\n");
        report.setProperty("INSERT","["+Now.format(new Date())+"] Initialisation Complete\n");
    }
    public void stop(){
        report.setProperty("INSERT","["+Now.format(new Date())+"] Acquisition Stopped\n");
    }

}

The typical results of the above "code" are as follows

[06:30:09] Acquisition Started
[06:30:09] ADC Channel 1: Read Complete
[06:30:09] Initialisation Complete
[06:30:13] Acquisition Stopped

I wonder if there is a way to display the time in a 24-hour format (i.e. 18:30:09 instead of 06:30:09)?

Is there another way to display milliseconds? Formats like HH: mm: SS: mils? I tried to use SSS instead of SS, but I only got 0.5% of the first s The sample output is

[21:50:004] Acquisition Started
[21:50:004] ADC Channel 1: Read Complete
[21:50:004] Initialisation Complete
[21:50:013] Acquisition Stopped

Solution

Try this:-

SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss:SSS");

Also read this. I hope it will help you