Passing javaArray to java method, error: No method 'getArray' with matching signature found for class

On Matlab Part:

 Test = Test_abc;      % Refer to Class Test_abc

 data = javaArray('java.lang.Float',2,3);

 for i=1:2
     for j = 1:3
         data(i,j)=java.lang.Float(i+j);
     end 
 end

 list_index = 2;      % another int number to be passed to java method

 Test.getArray(list_index-1, data);

On Java Part:

 public class Test_abc{

 ...
 public void getArray(int number, float[][] Mat_data)
 {      
  System.out.println("Java accepts the value" + Mat_data[0][0] + ".");
  System.out.println("Java accepts the value" + Mat_data[1][1] + ".");
 }
 ...
}

Then the error

 No method 'getArray' with matching signature found for class Test_abc

would pop up. What's strange is that if one normal matlab matrix element is passed, like " Test.getArray(list_index-1, X(1,1)); ", where X = [1,2; 3,4], there's no problem. I'm most sure that the problem lies in the conversation:

 Test.getArray(list_index-1, data);

 public void getArray(int number, float[][] Mat_data);

Why can't I pass a javaArray from matlab to java? Thank you!

Answer 1

[Malcolm Lidierth]

float (with no capital letter) is a primitive data type in Java

Float (with capital) is a 'boxed' primitive - a true Java object.

You are passing a Float array to getArray but specifying float in the method's signature.

For float, just use a MATLAB 'single' array.

[Pengfei]

Thank you soooooooo much, my life saver!!! I've spent the whole day struggling with it, as a Java beginner.