How to track time in the app?

Question

Java

Such a question, how to track through java, time in any application / game?

Answer 1

import java.util.Date;

public class Test {

   public static void main(String args[]) {
      // Инициализация объекта date
      Date date = new Date();

      // Вывод текущей даты и времени с использованием toString()
      System.out.println(date.toString());
   }
}

Answer 2

Maybe the execution time, ie. time since program start?
If yes, then org.apache.commons.lang.time.StopWatch is convenient.