Java FX + Request + Applet

Question

Hello,
I develop a simple Chat that sends the Chat Msg to a server and write it into a database. After that the read the 10 newest messages and response these as string...
In Netbeans it works greatly (Standard Exceution).. but If I change it to "Run in Browser" (Applet) then I load and load and load.. after this I get the screen and send a message and it load and load and load..
in the browser status I get the message "waiting on dl.javafx.com"... could it be that I require a file from javafx.com and if the site is down or under high burden my app will not start?
Here is the source:
package test;
import java.io.InputStream;
import java.lang.Byte;
import javafx.ext.swing.SwingButton;
import javafx.ext.swing.SwingLabel;
import javafx.ext.swing.SwingTextField;
import javafx.io.http.HttpRequest;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.Scene;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Font;
import javafx.scene.text.FontWeight;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import java.lang.Character;
import java.lang.StringBuffer;
Stage {
    // Schriftart
    var labelFont = Font.font("", FontWeight.BOLD, 12)
    var width:Number = 800,
    var height:Number = 600,
    var textInhalt:Text = Text {
        x: 25,
        y: 50,
        content: ""
    var eingabeFeld:SwingTextField =  SwingTextField {
        text: "",
        font: labelFont,
        translateX: 20,
        translateY: 530,
        focusable: false,
        width: width - 120
    // Request
    var query = "",
    var sendRequest:HttpRequest = HttpRequest{       
        location: bind query,
        onStarted: function() {
            println("Start HTTP Request")
        onDoneConnect: function() {
            println("Fertig...");
        onInput: function(input :InputStream) {
            var msg:String;
            var x:Integer;           
            while ((x = input.read()) != - 1) {
                msg+=new Character({x});               
            println("Gefunden: {msg}");
            if(msg != null) {
                textInhalt.content = msg
    title: "RDG-Rational - HT Chat",
    height: bind height,
    width: bind width,
    resizable: false,
    scene: Scene {       
        content: [
            Rectangle {
                width: bind width,
                height: bind height,
                fill: Color.web("#EEEEEE")
            Rectangle {
                width: bind width - 220,
                height: bind height - 120,
                fill: Color.web("#FFFFFF"),
                x: 20,
                y: 30
            textInhalt,
            SwingLabel {
                text: "Wilkommen im Haustechniker Chat",
                font: labelFont,
                translateX: 20,
                translateY: 5
            eingabeFeld,
            SwingButton {
                text: "Absenden",
                font: labelFont,
                translateX: width - 95,
                translateY: 530
                onMouseClicked: function( e: MouseEvent ):Void {
                    print(eingabeFeld.text);
                    if(eingabeFeld.text.trim().length() != 0) {                       
                        query = "http://localhost/Head/Wusa.do?msg={eingabeFeld.text}";
                        sendRequest.enqueue();                       
                    eingabeFeld.text = "";
}

Answer 1

OK, but this means that if a external website is down or my customer has no Internet access, the application will not run???
Can I set the application that they will run without externel resources?