Build and Run an Application

Create a MicroEJ Standalone Application

  • Create a project in your workspace. Select File > New > Standalone Application Project.

    New MicroEJ Standalone Application Project

    New MicroEJ Standalone Application Project

  • Fill in the Application template fields, the project name field will automatically duplicate in the following fields. For this tutorial, the project name is hello. Click on Finish. A template project is automatically created and ready to use, this project already contains all folders wherein developers need to put content:

    • src/main/java: Folder for future sources
    • src/main/resources: Folder for future resources (images, fonts, etc.)
    • module.ivy: Module description file, dependencies description for the current project
  • A Main class already exists in the package com.mycompany and prints “Hello World!” :

    MicroEJ Application Content

    MicroEJ Application Content

    The main Application is now ready to be executed. See next sections.

Run on the Simulator

Note

A Platform must have been imported to run the Application. If several Platforms have been imported, the target Platform can be selected in the Launcher’s Execution tab.

To run the sample project on Simulator, select it in the left panel then right-click and select Run > Run as > MicroEJ Application.

MicroEJ Launcher Shortcut

MicroEJ Launcher Shortcut

MicroEJ SDK console will display Launch steps messages.

=============== [ Initialization Stage ] ===============
=============== [ Launching on Simulator ] ===============
Hello World!
=============== [ Completed Successfully ] ===============

SUCCESS

Run on the Device

Build the Application

  • Open the run dialog (Run > Run Configurations…).
  • Select the MicroEJ Application > Hello Main that is created by the previous chapter.
  • Open Execution tab and select Execute on Device.
  • Set Settings checkbox to Build & Deploy.
Execution on Device

Execution on Device

  • Click Run : The Application is compiled and the Application, the runtime library and the header files are automatically deployed to the locations defined in your Platform BSP connection settings.
=============== [ Deployment ] ===============
MicroEJ files for the 3rd-party BSP project are generated to '<application-project>/<fully-qualified-name-of-main-class>/platform'.
The MicroEJ application (microejapp.o) has been deployed to: '<path-to-deployment-location>'.
The MicroEJ platform library (microejruntime.a) has been deployed to: '<path-to-deployment-location>'.
The MicroEJ platform header files (*.h) have been deployed to: '<path-to-deployment-location>'.
=============== [ Completed Successfully ] ===============

SUCCESS

Build the Executable File

If your Platform has configured a build script file, the final Application linking can be triggered from the launcher:

  • Open Configuration tab and select Device > Deploy. The options to deploy the Application, runtime library and header files have already been set in the previous step.
  • Check Execute the MicroEJ build script (build.bat) at a location known by the 3rd-party BSP project.
BSP connection options

BSP Connection Application Options

Note

The table MicroEJ Application Options for BSP Connection specifies the Application options that can be set depending on the BSP connection configured by the Platform.

  • Click Apply and Run : the final executable application.out file is generated in the directory from where the script has been executed and can now be deployed on your Device using the appropriate flash tool.