How can I pass a variable's value from java to MATLAB's Workspace?

Here is my Java Code. I want to pass the value of variable 'a' from java to MATLAB's Workspace. How can I do it?

 public class Valuepass {
  public static void main( String args[] )
  {
    int a=1;
    System.out.println( a );
    }
  }

Answer 1

[Kojiro Saito]

The following is procedures how to pass variable from Java to MATLAB workspace of current session.

(1) Copy MATLAB Engine jar file from $MATLAB_INSTALL\extern\engines\java\jar\engine.jar to your Java project. This will enable your java programs to import "com.mathworks.engine".

(2) Launch MATLAB and enable sharing to Java. In MATLAB Command Window, execute

matlab.engine.shareEngine

(3) Create a java file

Valuepass.java

import com.mathworks.engine.*;
public class Valuepass {

    public static void main(String args[]) throws Exception {
        String[] engines = MatlabEngine.findMatlab();
        MatlabEngine eng = MatlabEngine.connectMatlab(engines[0]);
        int a = 1;

        // This will put Java variable "a" to current MATLAB workspace
        eng.putVariable("a", a);

        System.out.println( a );
        eng.close();
    }
}

(4) Build a Java file and Valuepass.jar will be created. Then, run Java,

java -jar Valuepass.jar

(5) You will find a is stored in current MATLAB workspace.

For more detail, please refer to the following documents.

Doc: Pass Variables from Java to MATLAB

Doc: Connect Java to Running MATLAB Session

[Al Mamun]

Thank you for your answer. This is very much helpful.