Matlab exe unable to read a file created in Java

Question

My goal is to execute Matlab executables from a Java program. To test this mechanism I have a Java program that takes input and writes the values to a file. The Matlab .exe is programmed to read the file and display the content. (Once this works fine I will proceed with major Matlab operations).

But unfortunately, I am unable the print the content of the file using the Matlab executable. Here is my Java code.

public class JavaMatlab_I_O 
{
    public void MatlabexeCall(String commandline) 
    {
        try 
        {
            String line;
            Process p = Runtime.getRuntime().exec(commandline);
            BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
            while ((line = input.readLine()) != null) 
            {
                System.out.println(line);
            }
            input.close();
        } 
        catch (Exception err) 
        {
            err.printStackTrace();
        }
    }
    public static void main(String[] args) 
    {
        FileOutputStream fop = null;
        File file;
        String inp;
        System.out.println("Enter Data: ");
        Scanner obj = new Scanner(System.in);
        inp = obj.next();
        try 
        {
            file = new File("C:\\Users\\PritamDash\\Documents\\MATLAB\\TestFile2.txt");
            fop = new FileOutputStream(file);
            // if file doesnt exists, then create it
            if (!file.exists()) 
            {
                file.createNewFile();
            }

            // get the content in bytes
            byte[] contentInBytes = inp.getBytes();
            fop.write(contentInBytes);
            fop.flush();
            fop.close();
        } 
        catch (IOException e) 
        {
            e.printStackTrace();
        }
        JavaMatlab_I_O test = new JavaMatlab_I_O();
        test.MatlabexeCall("C:\\Users\\PritamDash\\Documents\\MATLAB\\myfunc1.exe");

        System.out.println("Done");
    }
}

Matlab code

function myfunc1()
    disp(importdata('TestFile2.txt'));
end  

I generated exe using mcc

mcc -mv myfunc1.m

When I execute !myfunc1.exe in matlab command prompt it works fine. When I remove the file operation and use myfunc1.exe to simply print a String it works fine when called from Java. I am unable to identify why Java Program is unable to trigger the file read operation in Matlab .exe

Answer 1

Try to modify your Matlab function to:

disp(importdata('C:\Users\PritamDash\Documents\MATLAB\TestFile2.txt'));