want to use updateMessage("...") in a Class that is not an Task - javafx

Question

I want to use updateMessage("...") in a Class that is not an Task.
How can I solve this Problem?
Is it possible to give a Task Handle which can perform a updateMessage("...") to a Function?
import javafx.concurrent.Task;
public class TestTask extends Task<Void> {
private final static int COUNT = 1000;
#Override
protected Void call() {
doTaskStuff("Found ");
return null;
}
public void doTaskStuff(String s) {
for (int i = 0; i < COUNT; i++) {
System.out.println(i);
this.updateProgress(i, COUNT);
this.updateMessage(s + (i + 1) + "!");
Dummy.dummy(this, i);
try {
Thread.sleep(1);
} catch (InterruptedException interruptedException) {
}
}
}
}
class Dummy {
public static void dummy(TestTask testTask, int i) {
String s = "";
if (i == 0) {
s = "i == 0";
} else {
s = "i != 0";
}
testTask.updateMessage(s);// does not work
}
}

Answer 1

The issue here is the method being protected. Of course you could override the method and increase the visibility, but this would imho be a bad approach:
#Override
public void updateMessage(String message) {
super.updateMessage(message);
}
Note that the method sets a single message, therefore you could just return the value:
updateMessage(Dummy.dummy(i));
public static String dummy(int i) {
return (i == 0) ? "i == 0" : "i != 0";
}
For multiple updates you could also provide access to this kind of functionality using an interface:
Dummy.dummy(this::updateMessage, i);
public static void dummy(Consumer<String> updater, int i) {
updater.accept((i == 0) ? "i == 0" : "i != 0");
}