add minutes to timestamp- most efficient way

Question

I have to write a java code to add minutes(delayminutes) to a timestamp(tmpTimeStamp). This is what I have. I was wondering if this is an efficient way to do this or if there is a better way.

long t=tmpTimeStamp.getTime();
long m=delayMinutes*60*1000;
targetDeliveryStamp= new Timestamp(t+m);

Answer 1

That's pretty good. You can be slightly more efficient and avoid object construction overhead if you can reuse your temporary Timestamp:

tmpTimeStamp.setTime(tmpTimeStamp.getTime() + TimeUnit.MINUTES.toMillis(delayMinutes));