j2me-gamedev-series

Learn Game Development on J2ME. Playlist is available on YouTube

Emulating apps

Applying the j2me-app gradle plugin will provide an emulate task. This uses MicroEmulator to emulate the generated JAR file.

Here's how to emulate the example/ project:

./gradlew :example:emulate

Running slideshows

The slides are built using Marp, which is Node.js based. We're using a gradle plugin to automatically download Node.js behind the scenes and use it to run Marp.

Use the following command to start slideshow:

./gradlew :slideshow

By default, the UI should come live on port 8080. To use a different port, try with environment variable PORT set to the target value.

Creating new projects

To create a new project, follow these steps:

1. Create a new directory (for example: pong). This name will become your project name.
2. Include project name in settings.gradle.kts file (adding this: include("pong")).
3. Copy the contents from example directory to this.
4. Run it once for verification (using command: ./gradlew :pong:emulate).
5. Sip your chai/coffee.

Generating thumbnails

For the sake of automation, there is also a gradle task to generate YouTube video thumbnails. Use the following command to run this task:

./gradlew :thumbnail -Pepisode=25 -PscaleFactor=2

Here, scaleFactor property is optional and is set to 10 by default. The episode property is mandatory and must be a number within 0 to 99.

The generated thumbnail should look like this:

Thanks! 👋