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The com.jme3.application provides a toolset for jME3 applications
to interact with various components of the engine. Typically, the
{@link com.jme3.app.Application} class will be extended and the update() method
implemented to provide functionality for the main loop. 


An Application will typically provide the following services:

    {@link com.jme3.asset.AssetManager} - A system for finding and loading
    data assets included with the application, such as models and textures.
    {@link com.jme3.renderer.RenderManager} - A high-level rendering
        interface for 3D graphics, manages viewports and scenes assigned
        to the viewports, as well as general high-level rendering.
    {@link com.jme3.input.InputManager} - An interface for handling input
        from devices such as keyboard, mouse, and gamepad/joystick.
    {@link com.jme3.app.state.AppStateManager} - Manager for
        {@link com.jme3.app.state.AppState}s, which are specific application
        functionality to be executed inside the main loop.
    {@link com.jme3.audio.AudioRenderer} - Allows playing sound effects and 
        music.
    {@link com.jme3.system.Timer} - The timer keeps track of time and allows
        computing the time since the last frame (TPF) that is neccessary
        for framerate-independent updates and motion.
    {@link com.jme3.system.AppSettings} - A database containing various
        settings for the application. These settings may be set by the user
        or the application itself.



Usage

An example use of the Application class is as follows





public class ExampleUse extends Application {



    private Node rootNode = new Node("Root Node");



    public static void main(String[] args){

        ExampleUse app = new ExampleUse();

        app.start();

    }



    @Override

    public void initialize(){

        super.initialize();



        // attach root node to viewport

        viewPort.attachScene(rootNode);

    }



    @Override

    public void update(){

        super.update();



        float tpf = timer.getTimePerFrame();



        // update rootNode

        rootNode.updateLogicalState(tpf);

        rootNode.updateGeometricState();



        // render the viewports

        renderManager.render(tpf);

    }

}