Help needed with timer codes

Question

i have tried to do a countdown timer but can't debug it.. can anyone help me with it or can anyone provide me with the correct coding for countdown timer..
import java.awt.*;
import java.Swing.*;
import java.util.*;
import java.awt.*;
import java.Swing.*;
import java.util.*;
public class timer
     public static void main (String [] args)
          double sec = 150;
          countDown(sec);
     private Thread countDown(double seconds)
        final double time = seconds;
        Runnable runnable(){
               public void run(){
              try{
                Thread.sleep(time * 1000);
              }catch(Exception e){}
        return new Thread(runnable);
     public  void displayCountDown(){
       int seconds = 22;
       for(int i = 0; i < seconds; i++){
         Thread trd = countDown(i);
         trd.start(){
         while(trd.isAlive()){
           ; // wait
         System.out.print('\r');
         System.out.print(i);
}

Answer 1

I would suggest using javax.swing.Timer or java.util.Timer instead of implementing it yourself.