Running MATLAB function from Java

Question

I have an .m file in MATLAB which I would like to call from Java an get the solution as a string or whatever in Java. This sounds really simple but for some reason I can't make it work.

I tried this:

matlab -nosplash -wait -nodesktop -r  myFunction

but I'm not sure how I parse the answer since MATLAB opens it's own command line (in Windows).

I use this, but it doesn't return anything.

Process p = Runtime.getRuntime().exec(commandToRun);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));

also it seems that every time I call MATLAB it opens a separate window which is a problem because I'd like to run this many times.

perhaps -logfile command option might help: stackoverflow.com/questions/1518072/… — Amro
– Amro, Commented Oct 22, 2009 at 16:28

Jeff Storey · Accepted Answer · 2009-10-23 02:53:01Z

7

The trick is to use the MatlabControl class http://www.cs.virginia.edu/~whitehouse/matlab/JavaMatlab.html. It's very easy to use and you can do exactly what you're trying to do (and more).

answered Oct 23, 2009 at 2:53

Jeff Storey

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Scottie T Over a year ago

Jeff! Rob! Good to see you guys on here.

Joshua Kaplan · Accepted Answer · 2011-07-08 23:20:35Z

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matlabcontrol is based on the same underlying MATLAB library used by MatlabControl mentioned by Jeff, but is more up to date, reliable, and documented. To get started, take a look at the walkthrough.

answered Jul 8, 2011 at 23:20

Joshua Kaplan

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quepas · Accepted Answer · 2016-09-15 15:32:10Z

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In Matlab R2016b, MathWorks added MATLAB Engine API for Java which allows to execute MATLAB code from Java.

answered Sep 15, 2016 at 15:32

quepas

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Maksim Khadkevich · Accepted Answer · 2013-08-19 14:41:11Z

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JAMAL is an open source, Java RMI-based (Java Remote Method Invocation API) library that suits your needs

answered Aug 19, 2013 at 14:41

Maksim Khadkevich

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Wolfgang Ulmer · Accepted Answer · 2009-10-23 17:14:22Z

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There exists a good Java-COM-Bridge called JaCoB (http://sourceforge.net/projects/jacob-project/) which you can use to automatically start Matlab as a COM-Server in the background. You can then follow the instructions in the Matlab help to interact with the Matlab COM Interface.

Although this is a very generic interface, it provides enough flexibility to easily do a few calls to Matlab like in your case.

Simply download the JaCoB package and look in the docs folder for some documentation. You also have to include the Jacob DLL in your path.

answered Oct 23, 2009 at 17:14

Wolfgang Ulmer

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