Counting time with a clock

public class Clock {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        long startTime = System.currentTimeMillis();
        System.out.println(startTime);
        long elapsedTime = 0;
        for(int i=0; elapsedTime/1000F <= 5;){
            long currentTime = System.currentTimeMillis();
            elapsedTime = currentTime - startTime;
            if(elapsedTime/1000F == (int)(elapsedTime/1000F)){
                System.out.println("Time: " + (elapsedTime/1000F));
            }
        }
    }

}