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From "Gilles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MATH-1256) Interval class upper and lower check
Date Mon, 17 Aug 2015 13:04:45 GMT

    [ https://issues.apache.org/jira/browse/MATH-1256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14699497#comment-14699497
] 

Gilles commented on MATH-1256:
------------------------------

Hi.

bq. Do you throw an exception \[...\]

Yes.

I had started a thread on the project's ML (in case the issue had non-obvious implications):
  http://markmail.org/thread/62bpxwifl2lftvg5

You can browse through the modifications here:
  https://git1-us-west.apache.org/repos/asf?p=commons-math.git


> Interval class upper and lower check
> ------------------------------------
>
>                 Key: MATH-1256
>                 URL: https://issues.apache.org/jira/browse/MATH-1256
>             Project: Commons Math
>          Issue Type: Bug
>            Reporter: Gunel Jahangirova
>            Priority: Minor
>             Fix For: 4.0, 3.6
>
>
> In class Interval, which is in the package org.apache.commons.math4.geometry.euclidean.oned
it is possible to pass the value for variable upper  less than the value of variable lower,
which is logically incorrect and  also causes the method getSize() to return negative value.
> For example:
>  @Test
>   public void test1()  throws Throwable  {
>       Interval interval0 = new Interval(0.0, (-1.0));
>       double double0 = interval0.getSize();
>       assertEquals((-1.0), double0, 0.01D);
>   }



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