SigDig.main() has thrown an IllegalArgumentException

We found this prefix in 2 webpages.
MapChildren (2)Typical messages (2)TraceDetailed Map
  1. java.lang.IllegalArgumentException
    1.   at java.text.NumberFormat.format()
    2.   at java.text.Format.format()
    3.   at SigDig.main()
  1. Re: How to write out double with only 2 digits?

    First:16 years ago
    Last:1 year ago
    Author:Jon Skeet
  2. How to write out double with only 2 digits?

    First:16 years ago
    Last:3 years ago
    Author:Fred
MessageNumber of crashes
Cannot format given Object as a Number1
Cannot format given Object as a Number1
  1. java.lang.IllegalArgumentException
    1.   at java.text.NumberFormat.format()
    2.   at java.text.Format.format()
    3.   at SigDig.main()