Stopwatch.java

public class Stopwatch {
	public static void main(String[] args){
		long startingTime = System.currentTimeMillis();
		long currentTime;
		long deltaTime = 0;
		long stopTime = 60 * 1000; // 60 seconds in miliseconds
		while((currentTime = System.currentTimeMillis()) <= startingTime + stopTime){
			deltaTime = currentTime - startingTime;
			System.out.printf("%d miliseconds passed\n", deltaTime);
		}
	}
}