Originally posted by: CedricVB

Hello,

To make my models a bit easier to work with, I'd like to spice them up with confirmation dialogs/alerts. Since this functionality wasn't available in the javascript API, I wanted to interface my CPLEX model with Java. 

I've got the following code:

package vrp;

import javax.swing.*;

import ilog.opl.*;

 

public class Extensions {

private JFrame frame = new JFrame();

 

public Extensions() {

frame.setSize(400,400);

frame.setVisible(true);

}

The file loads correctly, I'm able to execute functions from my OPL file, but the window isn't shown (though it is when I try to execute the classfile directly).
Any idea if it is possible to do this?

Kind regards,

Cedric

Originally posted by: rdumeur

Hi Cedric,

Unfortunately, your code seems truncated. Could you please repost it as an attachment?

Thank you in advance,

Cheers,

Originally posted by: CedricVB

Hello :)

Actually, that's all of the Java code (except for the closing bracket). 

In my CP mod file I've got the following:

using CP;

execute {

    IloOplImportJava("java/Extensions.jar");

    var obj = IloOplCallJava("vrp.Extensions", "<init>", "");
}

Execution "blocks" right after the init, which I would interpret as the GUI running in the same thread as the execution thread, but still no window is shown. (Note: everything non-GUI related works just fine.)

Originally posted by: FredericDelhoume

Hi,

Your code works fine on my machine, in  OPL IDE the window opens and stays there, running with oplrun the window appears then closes because execution ends.

Originally posted by: CedricVB

Apparently the problem is Java VM-related... Not sure exactly why that is and it is working for Frederic though.
It now works when supplying a different java VM as startup parameter for the IDE.

-vm "C:\Program Files\Java\jdk1.7.0_07\jre\bin"

Now able to make confirmation dialogs! Awesomeness :)