the demo JavaKeywordsAsync.java have a bug

[TututuXi]

There is a bug in class JavaKeywordsAsync.java. The method multiPlainChanges() does not exist. The method must be replaced by method plainTextChanges()

public void start(Stage primaryStage) {
        executor = Executors.newSingleThreadExecutor();
        codeArea = new CodeArea();
        codeArea.setParagraphGraphicFactory(LineNumberFactory.get(codeArea));
        Subscription cleanupWhenDone = codeArea.multiPlainChanges()
                .successionEnds(Duration.ofMillis(500))
                .supplyTask(this::computeHighlightingAsync)
...

[JordanMartinez]

It exists. You're probably using the wrong RTFX version (there isn't a stable release that includes that method yet) or have an issue with your dependencies' cache.

[JordanMartinez]

Since I haven't heard back from you and the latest stable release 0.9.0 includes the API, I'm closing this issue.