MATLAB: See signature of a Javafunction in Matlab

MATLABsignatur java

I have a java class ClassA containing a method

public int method1(int a,int b){…}

in a jar file called example.jar. I can creat instances of ClassA and call the method. But is there any way, that i can see the signature of method1 in matlab?

I only found how to do it with matlab functions as describt here.

Best Answer

Use the methods function with the -full option.

Related Solutions

MATLAB: How to pass a javaArray of Doubles to a method that takes double[] arguments from MATLAB

java.lang.Double is an object wrapper around the Java double builtin data type. Arrays of java.lang.Doubles cannot be used as arguments to methods that expect double[].

To call methods with these signatures, use a MATLAB array of doubles:

ma = [11 12];
b = mySum.sum(ma)

This returns the expected result:

 b =
     23

Note that the argument is converted automatically, as the array "ma" above, is passed by value.

For more information about the passing data to Java functions from MATLAB see the link below.

Passing Built-In Types :: Using Sun Java Classes in MATLAB (External Interfaces)

https://www.mathworks.com/help/releases/R2016b/matlab/matlab_external/passing-data-to-a-java-method.html

For more information about the differences between double and java.lang.Double, refer to a Java resource.

MATLAB: Does LIBFUNCTIONS not display more than 8 return arguments in MATLAB 7.6 (R2008a)

This is a limitation of the METHODS, METHODSVIEW, LIBFUNCTIONS, and LIBFUNCTIONVIEW functions in MATLAB release version up to and including MATLAB 7.6 (R2008a). METHODS -full does not list more then 8 output arguments and displays only the first output. Note that the function can still be called correctly and all outputs are returned.

A workaround to view the full function signature is to use the following:

libpkg=findpackage('lib'); 
class=findclass(libpkg,'fifteenArgDLL'); 
methods=class.methods;

The "method" variable would then contain information about the library:

%Sample invocation:
>> get(methods(1))
                  Name: 'myfun'
           Description: 'myfun'
             Signature: [1x1 schema.signature]
                Static: 'on'
      FirstArgDispatch: 'on'
>> get(methods(1).Signature)
       InputTypes: {16x1 cell}
      OutputTypes: {17x1 cell}
        Varargout: 'off'
         Varargin: 'off'
>> methods(1).Signature.OutputTypes
ans = 
      'double'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'
      'doublePtr'

Best Answer

Related Solutions

MATLAB: How to pass a javaArray of Doubles to a method that takes double[] arguments from MATLAB

MATLAB: Does LIBFUNCTIONS not display more than 8 return arguments in MATLAB 7.6 (R2008a)

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