When using JDK 19 to build JavaFX, we get the following error from the "javadoc" task:

modules/javafx.graphics/src/main/java/javafx/concurrent/Task.java:693: error: reference to State is ambiguous
    private ObjectProperty<State> state = new SimpleObjectProperty<>(this, "state", State.READY);
                           ^
  both enum java.util.concurrent.Future.State in Future and enum javafx.concurrent.Worker.State in Worker match
modules/javafx.graphics/src/main/java/javafx/concurrent/Task.java:694: error: reference to State is ambiguous
    final void setState(State value) { // package access for the Service
                        ^
  both enum java.util.concurrent.Future.State in Future and enum javafx.concurrent.Worker.State in Worker match
modules/javafx.graphics/src/main/java/javafx/concurrent/Task.java:732: error: reference to State is ambiguous
    @Override public final State getState() { checkThread(); return state.get(); }
                           ^
  both enum java.util.concurrent.Future.State in Future and enum javafx.concurrent.Worker.State in Worker match
modules/javafx.graphics/src/main/java/javafx/concurrent/Task.java:733: error: reference to State is ambiguous
    @Override public final ReadOnlyObjectProperty<State> stateProperty() { checkThread(); return state; }
                                                  ^
  both enum java.util.concurrent.Future.State in Future and enum javafx.concurrent.Worker.State in Worker match
4 errors


The only reason we don't get them from the javac task is that we run javac with "--release 17" for most modules, including the gaphics modules. If we instead use "-source 17 -target 17" then javac produces the same error.