What is the Maximum value for Java Duration

Question

I tried to create a max Duration in Java 8 by using Duration.ofMillis(Long.MAX_VALUE) but got a long overflow. How would I programmatically get the equivalent of a Duration.MAX_VALUE if it existed?

Edit: The long overflow was likely caused by an attempt to add to the value instead of during construction. Apologies for not having reproducible code.

Answer 1

It looks like Duration is stored in seconds (up to Long.MAX_VALUE ) and nanoseconds (up to 999,999,999 ). Then the biggest duration possible is:

Duration d = Duration.ofSeconds(Long.MAX_VALUE, 999_999_999);

When I print it ( System.out.print(d) ) I get the following:

PT2562047788015215H30M7.999999999S

which means: 2562047788015215 hours, 30 minutes, and 7.999999999 seconds.

Answer 2

According to the Javadoc :

The duration uses nanosecond resolution with a maximum value of the seconds that can be held in a long.

The range of a duration requires the storage of a number larger than a long. To achieve this, the class stores a long representing seconds and an int representing nanosecond-of-second, which will always be between 0 and 999,999,999. The model is of a directed duration, meaning that the duration may be negative.

Answer 3

简单：

Duration maxDur = ChronoUnit.FOREVER.getDuration();