จับเวลา

import javax.swing.JOptionPane;

public class Th extends Thread implements Runnable{
 Th() throws InterruptedException{
 
  

    for(int i = 1;i <= 200;i++)
      {
    System.out.println(i);
    sleep(1000);
    if(i==8){
     JOptionPane.showMessageDialog(null, "Hurry");
    
    }
    if(i==15){
     JOptionPane.showMessageDialog(null, "End");
    System.exit(0);
    }
    }
    }
  



 public static void main(String[] args) throws InterruptedException {
  new Th();
 }
}