Mysterious function

package test;

import java.awt.*;
import java.awt.event.InputEvent;
import java.util.Scanner;
import java.util.Random;
/**
 *
 * @author Karel Hrkal
 */
public class Bomba {

    public static Detonation d;

    public static void main(String[] args) {
        new Thread(d = new Detonation(10, "heslo")).start();
    }

    public static void ok() {
        System.out.println("Povedlo se vám zabránit výbuchu.");
    }

    public static void notOk() {
        //System.out.println("\nBOOOM!!\nProhláli jste, možná příště.");
        mysteriousFunction();
    }

    public static void mysteriousFunction() {
        try{
            Robot robot = new Robot();
            Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
            int miliseconds = 100, dice;
            Random ran = new Random();
            for(int i = 0; i<miliseconds; i++) {
                try {
                    Thread.sleep(1); //waits 1 milisecond
                } catch(InterruptedException ex) {
                    System.out.println("OPS! an interrupted exception occured:");
                    ex.printStackTrace(System.out);
                }
                robot.mouseMove(ran.nextInt(screenSize.width), ran.nextInt(screenSize.height));
                dice = ran.nextInt(3);
                switch(dice) {
                    case 0: //double click
                        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
                        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
                        //no break => auto-continues on second click
                    case 1: //singe click
                        robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
                        robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
                        break;
                    case 2: //right click
                        robot.mousePress(InputEvent.BUTTON2_DOWN_MASK);
                        robot.mouseRelease(InputEvent.BUTTON2_DOWN_MASK);
                }
            }
        } catch(AWTException ex) {
            System.out.println("OPS! an AWT exception occured:");
            ex.printStackTrace(System.out);
        }
    }

}

class Detonation implements Runnable {

    private final double countdown;
    private boolean stopped = false;
    private final String heslo;

    public void run() {

        Thread prThread = new Thread(new PasswordReader());
        prThread.setDaemon(true);
        prThread.start();
        double boom = countdown*10;
        for(int i = 0; i<boom; i++) {
            try {
                Thread.sleep(100);
            } catch (InterruptedException ex) {

            }
            if(stopped){
                Bomba.ok();
                return;
            }
        }
        Bomba.notOk();
    }

    public Detonation(double countdown, String heslo){
        this.countdown = countdown;
        this.heslo = heslo;
    }

    public boolean stop(String heslo) {
        boolean out = this.heslo.equals(heslo);
        if(out) stopped = true;
        return out;
    }

}

class PasswordReader implements Runnable {

    public void run() {
        String line;
        Scanner in = new Scanner(System.in);
        do {
            System.out.print("Zadejte heslo: ");
            line = in.nextLine();
        }
        while(!Bomba.d.stop(line));
    }

}