We will implement the Hello World code on the initial transition of the [HelloWorldTop] actor. Therefore open the state machine editor by right clicking the [HelloWorldTop] actor in the outline view and select [Edit Behavior].
The state machine editor will be opened. Drag and drop an [Initial Point] from the tool box to the diagram into the top level state. Drag and drop a [State] from the tool box to the diagram. Confirm the dialogue with [ok]. Select the [Transition] in the tool box and draw the transition from the [Initial Point] to the State. Open the transition dialogue by double clicking the caption of the transition and fill in the action code.
System.out.println("Hello World !");
The result should look like this:
Save the diagram and inspect the model file. Note that the textual representation was created after saving the diagram.
