JavaFX TextFlow错误| java.lang.IllegalStateException：不在FX应用程序线程上

Question

我尝试将TextArea更改为TextFlow，以便在聊天应用程序中显示彩色文本。使用TextArea，此代码可以正常工作。但是使用Textflow，我收到了异常消息。

    public void initialize()throws Exception{
        (new Thread() {
            public void run() {
                isClient = true;
                client = new Client(ip,userName,port){
                    public void display(CommandList command, String msg){
                        switch(command) {
                            case WELCOME:
                                textAreaMessages.getChildren().add(new Text("Welcome to SAND, "+userName+"\n"));

                                break;

                        }
                    }
                };
            }
        }).start();

我也尝试使用Platform.runlater，但它也没有用。

 public void initialize()throws Exception{
        Platform.runLater(new Runnable() {
                public void run() {
                client = new Client(ip,userName,port){
                    public void display(CommandList command, String msg){
                        switch(command) {
                            case WELCOME:
                                textAreaMessages.getChildren().add(new Text("Welcome to SAND, "+userName+"\n"));
                                //enable text-input in chat
                                break;
                            case MESSAGE:
                                textAreaMessages.getChildren().add(new Text(msg+"\n"));
                                break;
                        }
                    }
                };
            }
        });
    }

这是我收到的异常消息。

 Exception in thread "Thread-5" java.lang.IllegalStateException: Not on FX application thread; currentThread = Thread-5
        at com.sun.javafx.tk.Toolkit.checkFxUserThread(Toolkit.java:236)
        at com.sun.javafx.tk.quantum.QuantumToolkit.checkFxUserThread(QuantumToolkit.java:423)
        at javafx.scene.Parent$2.onProposedChange(Parent.java:367)
        at com.sun.javafx.collections.VetoableListDecorator.add(VetoableListDecorator.java:206)
        at ClientController$1$1.display(ClientController.java:47)
        at Client$2.run(Client.java:167)