How do I get the difference in seconds and milliseconds between 3 dates?-CodePudding

I have three different Dates, in this format:

long firstDate = System.currentTimeMillis();
long secondDate = System.currentTimeMillis();
long thirdDate = System.currentTimeMillis();

The firstDate is the starting point.

I want the seconds milliseconds that have passed between the starting point and to the others.

Example:

firstDate = 0.000

secondDate= 1.234

thirdDate = 2.345

CodePudding user response：

First, understand that System.currentTimeMillis was supplanted years ago by java.time.Instant.

Instant x = Instant.now() ;

Calculate elapsed time with Duration.

Duration d = Duration.between ( x , y ) ;

Tip: To represent each span of time, add the ThreeTen-Extra library to your project for its Interval class.

CodePudding user response：

final long totalDiffInMillis = thirdDate - firstDate;
final String diffSeconds = new DecimalFormat("#").format(totalDiffInMillis / 1000);
final long diffMillis = totalDiffInMillis % 1000;

System.out.printf("Diff between thirdDate and firstDate: %s seconds, %d milliseconds", 
                   diffSeconds,
                   diffMillis);

CodePudding user response：

For your case, you can use Stopwatch from Google Guava.