Is it possible to invoke a method in a Java class that accepts variable number of input arguments in MATLAB 7.7(R2008b)?

Here is the sample Java code that accepts variable number of arguments:

public class TestVarArgs {

   // calculate average of numbers of type 'double'

   public static double average( double... numbers )

   {

       double total = 0.0; // initialize total

       for ( double d : numbers )

         total += d;

       return total / numbers.length;

     }

   // calculate average of numbers of type 'Double'

    public static Double averageD( Double... numbers )

    {

        Double total = 0.0;

        for ( Double d : numbers )

          total += d;

       return total / numbers.length;

    } 

}

When I try to invoke any of the above methods in MATLAB as follows:

a = TestVarArgs

a.average(7,6)

a.averageD(java.lang.Double(23), java.lang.Double(34))

I get the following errors respectively:

 ??? No method 'average' with matching signature found for

 class 'VarargsTest'.

 ??? No method 'averageD' with matching signature found for class

 'VarargsTest'.

Answer 1

[MathWorks Support Team]

The ability to directly use Java methods that accept variable number of input arguments using the Java 5 syntax is not available in MATLAB.

To work around this issue, we can provide 'arrays' of the input argument type as follows:

% invoke the method that accepts variable number of native 'double' type  

a = TestVarArgs;

numbers = [2,3,4,5]

a.average(numbers)

numbers = [2,3];

a.average(numbers)

%invoke the method that accepts variable number of class 'Double' type:

numbersD= javaArray('java.lang.Double',3)

numbersD(1)= java.lang.Double(10);

numbersD(2)= java.lang.Double(20);

numbersD(3)= java.lang.Double(30);

a.averageD(numbersD);