java code to assign two minutes as a time interval

String qtm = "00:02:00";
SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
java.util.Date d = null;
try 
{
  d =  formatter.parse(qtm);}
catch (java.text.ParseException e) {
  System.err.println("Error: " + e.getMessage());
} 
System.out.println(d);

this code gives me:-

Thu Jan 01 00:02:00 IST 1970

in my program I want to keep a time quantum of 2 minutes for roundrobin algo, how can I do that?? please help me. when I give 

long curr= d.getTime();
system.out.println(d);

it gives the output:-

-19500000

please tell me how to give just 2 minutes as an interval and to assign it to a variable....

Jon Skeet
people
quotationmark

The problem at the moment is that your SimpleDateFormat is in your local time zone, whereas Date.getTime() gives you the milliseconds since the Unix epoch in UTC.

You can fix this as:

SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
formatter.setTimeZone(TimeZone.getTimeZone("Etc/UTC"));

... and then use getTime() as before.

Ideally, it would be better to use Joda Time or the Java 8 java.time package, both of which have a Duration type to represent this sort of value. Joda Time has a PeriodFormatter which could be used to parse this as a Period and convert that into a Duration, which is a bit long-winded, admittedly. I don't see a way of parsing straight to a Duration for either of them...

people

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