import sys
from javafx.application import Application
from javafx.scene import Group
from javafx.scene import Scene
from javafx.scene.layout import HBox
from javafx.scene.control import Label
from javafx.util import Callback

class HelloApplication(Application):
    def start(self, stage):
        hbox = HBox()
        scene = Scene( hbox, 640, 480 )
        hbox.getChildren().add( Label( "Hello, JavaFX World!" ) )
        stage.setScene( scene )
        stage.setTitle( "Hello, World" )
        stage.show()
 
if __name__ == "__main__":
    Application.launch(HelloApplication().class, sys.argv[1:])