We will wrap up this chapter by integrating most of what we learned and achieve a complex task: grouping keystrokes that happen in rapid succession to form strings without any delay. It can be helpful in user interfaces to immediately jump to items in a list based on what is being typed or perform autocompletion in some way. This can be a challenging task, but as we will see, it is not that difficult with RxJava.
This exercise will use JavaFX again with RxJavaFX. Our user interface will simply have a Label that receives rolling concatenations of keys we are typing. But after 1 second, it will reset and receive an empty "" to clear it. Here is the code that achieves this:
public final class Ch7_17 extends Application {
public static void main(String... args) { launch(args); }
@Override
public void start(Stage stage) {
Pane root = new...
