Java - Matlab Connection
11 Jan 2007

Here is a small demonstration program which allows you to type the text:

a = [1 2 3];

in a java application (launched from within matlab) and send it into Matlab's workspace as matrix data.

This is how you do it:

1. Download the MatlabInterface.jar [or the Netbeans Project MatlabInterface]

2. To Compile your own code add jmi.jar [%MATLABROOT%/java/jar] from the following directory in Project Properties->Libraries->Add JAR/zip

3. Matlab Command Window:

>> javaaddpath('C:\Debprakash\Java\MatlabInterface\dist\MatlabInterface.jar');
>> import org.test.MatDialog;
>> MatDialog.test
r = [98 93 52 39 31 17 10 39 43 97 ];
>> r
r = 

   98    93    52    39    31    17    10    39    43    97

Java Code for MatDialog.java


Create the Matlab object which connects to the current matlab session.
-----------------------------------------------------------------------

package org.test;

import java.util.Date;
import com.mathworks.jmi.*;

public class MatDialog extends javax.swing.JFrame
{
    private Matlab matlab;
    public MatDialog()
    {
        ...
        matlab = new Matlab();
    }

Add an action listener to call eval on the matlab object
------------------------------------------------------

...
private void jButtonProcessActionPerformed(java.awt.event.ActionEvent evt)
{
   ...
   else if (jRadioButton2.isSelected())
   {
      cmd = jTextField1.getText();
   }

   if (cmd != null)
   {
      System.out.println(cmd);
      matlab.eval(cmd);
   }
}

For More Info

See Integrating Java Components into MATLAB

Source code download
Calling Matlab From Java
Calling matlab in Java