// time_of_day.java      just use Date and Calendar classes

import java.util.*;

public class time_of_day
{
  double t1, t2; // time in milliseconds
  double waste = 0.0;
  
  public time_of_day()
  {
    System.out.println("time_of_day from Java");

    System.out.println();    
    GregorianCalendar now = new GregorianCalendar(); // now
    System.out.println(now.toString()); // whole mess

    System.out.println();    
    System.out.println(now.get(GregorianCalendar.MONTH)+"/"+
                       now.get(GregorianCalendar.DATE)+"/"+
                       now.get(GregorianCalendar.YEAR));
    System.out.println(now.get(GregorianCalendar.HOUR)+":"+
                       now.get(GregorianCalendar.MINUTE)+":"+
                       now.get(GregorianCalendar.SECOND));
    System.out.println(now.get(GregorianCalendar.MILLISECOND)+
                       " milliseconds");

    System.out.println(); // get time, waste time, get time    
    t1 = System.currentTimeMillis();
    System.out.println("t1="+t1);
    for(int i=0; i<100000; i++)
      waste = waste + Math.sin(1.723)*Math.cos(1.113)/394.247;
    if(waste>0.0) waste = 0.0;
    t2 = System.currentTimeMillis();
    System.out.println("t2="+t2+"  t2-t1="+(t2-t1)+" milliseconds");

    Date dt = new Date();
    System.out.println("getTime() = "+dt.getTime()+" seconds since epoc");
  }

  public static void main (String[] args)
  {
    new time_of_day();
  }
}