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https://issues.apache.org/jira/browse/JENA-1503?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16393085#comment-16393085
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Andy Seaborne commented on JENA-1503:
-------------------------------------
The route via creating with a {{GregorianCalendar}} is a "feature" of Java
Gregorian calendar. It does not handle negative years and converts them to
positive+1.
{noformat}
Calendar cal1 = new GregorianCalendar(-77, 1, 2, 10, 11, 12);
System.out.println(cal1.get(Calendar.YEAR));
{noformat}
==> 78.
This is only in support of app code that uses {{GregorianCalendar}} already.
I will submit some testing changes around this to go after #377.
> Bug in XSDDateTime toString
> ---------------------------
>
> Key: JENA-1503
> URL: https://issues.apache.org/jira/browse/JENA-1503
> Project: Apache Jena
> Issue Type: Bug
> Components: Datatypes
> Reporter: Derek Law
> Assignee: Andy Seaborne
> Priority: Major
> Labels: beginner, easyfix, newbie, patch
> Attachments: proposed_fix.txt
>
> Original Estimate: 0.1h
> Remaining Estimate: 0.1h
>
> toString() for the class org.apache.jena.datatypes.xsd.XSDDateTime generates
> incorrect output when year value is between -999 and -1.
> For example : the representation of date time "-0001-01-01T00:00:00" in
> XSDDateTime class has data array of (-1,1,1,0,0,0,0,0,0) and mask = 15.
> however, the toString() method incorrectly outputs "000-1-01-01T00:00:00"
> proposed fix attached.
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