如何从Java类调用javafx类？

Question

I have called from my java class another javafx class as a background thread.

     while(true)
     {
    ....
    .... (build new arguments)
    ....

    Thread t = new Thread() {
        public void run() {
            ChartData.main(arguments);
        }
    };
    t.start();
    }

I get an ERROR:

Exception in thread "Thread-7" java.lang.IllegalStateException: Application launch must not be called more than once at om.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:94) at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:75) at javafx.application.Application.launch(Application.java:209)

with javafx class I have constructed only a scatterplot and all my other objects have been achieved in java class.

Thank you for your Help.

Answer 1

This is not the way JavaFX works.

You have 2 options:

1. make your program a proper JavaFX application, and just update the content of your drawing, GUI, or whatever. (You don't need an extra thread for this: just submit something to the UI thread with invokeLater.)

2. Instead of a thread, run the separate JavaFX in its own process, see ProcessBuilder. Though this is more clean, you'll have to think abvout how to pass the data to show to the process