COMSOL 6.4 - Using Built-In Methods from an External Java Library

Using Built-In Methods from an External Java Library

When developing an external Java® library to be used in the Application Builder, it is possible to call the built-in methods from the external library. In order to do so, the com.comsol.api JAR-file needs to be added to the project build path, and the classes that call the methods need to extend the ApplicationLanguageBase class. The following steps explain how to create a simple example JAR library when using the Eclipse® integrated development environment:

Start Eclipse®.

Create a new Java® project. Enter JavaLibDemo as the project name and click .

Go to the tab and click . Add the JAR-file com.comsol.api_1.0.0.jar from the plugins directory under the COMSOL Multiphysics installation directory; for example

C:\Program Files\COMSOL\COMSOL64\Multiphysics\plugins

Click .

Right-click the src folder in your project and select > . Enter demo as the package name and click .

Right-click the demo package in your project and select > . Enter Hello as the class name.

Click on > and select ApplicationLanguageBase. Click and .

In the editor window for the Hello class, add the following method and save the file:

public static void hello() {

alert("Hello!");

}

Right-click the JavaLibDemo project and select > > . Select the export destination JAR-file and click .

Start COMSOL Multiphysics and create a .

In the Application Builder, under the application tree, right-click and select . In the window, click and select the JAR-file previously exported from Eclipse®.

In the Application Builder, add a form, button, and method for the button.

In the Method Editor for the method, add the following code:

Hello.hello();

Click and click the button in the application to verify that the alert method is invoked.