[Octave-bug-tracker] [bug #48790] javaArray('double',1)

[Ernst Reissner]

URL:
  <http://savannah.gnu.org/bugs/?48790>

                 Summary: javaArray('double',1)
                 Project: GNU Octave
            Submitted by: ernstreissner
            Submitted on: Mon 15 Aug 2016 05:25:25 PM GMT
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: None
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

According to 

http://de.mathworks.com/help/matlab/ref/javaarray.html?searchHighlight=javaArray

javaArray(cls,1) has to return a java array 
i.e. for Octave an instance of octave_java 
wrapping some new cls[1]. 

Consider 
octave:16> dblCls=java_get('java.lang.Double', 'TYPE')
dblCls =

<Java object: java.lang.Class>

This is the class of the type double. 

o=javaArray(dblCls,1)
 seems to be 0 
and really: 
class(o)
yields double instead of double[]



I know also the reason: javaArray is based on javaMethod 
which performs boxing and unboxing. 
That way, double[] is converted to a double scalar. 







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