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[Octave-bug-tracker] [bug #48758] methods(java.lang.String)


From: Ernst Reissner
Subject: [Octave-bug-tracker] [bug #48758] methods(java.lang.String)
Date: Thu, 11 Aug 2016 14:23:31 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:48.0) Gecko/20100101 Firefox/48.0

URL:
  <http://savannah.gnu.org/bugs/?48758>

                 Summary: methods(java.lang.String) 
                 Project: GNU Octave
            Submitted by: ernstreissner
            Submitted on: Thu 11 Aug 2016 02:23:29 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

    _______________________________________________________

Details:

in files fieldnames.m and methods.m 
there is a FIXME comment,  
   ## FIXME: Function prototype accepts java obj, but doesn't work if obj
    ##        is e.g., java.lang.String.  Convert obj to classname then.


and 

   ## FIXME: Function prototype that excepts java obj exists, but doesn't
    ##        work if obj is java.lang.String.  Convert obj to classname.
 

This is due to a misunderstanding. 
According to 

http://de.mathworks.com/help/matlab/ref/methods.html?searchHighlight=methods
http://de.mathworks.com/help/matlab/ref/fieldnames.html, 

for java objects the fields and methods shall be returned. 
This applies in particular for class java.lang.String. 
The String value is not interpreted as classname!!! 

Thus with str=javaObject('java.lang.String', 'java.math.BigDecimal') 

fieldnames(str) 
returns the fields of String not of BigDecimal. 
This is correct. 

But methods(str) returns the methods of BigDecimal 
instead of String. 




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