标记显示旧位置和新位置

Question

在javaFX应用程序中，我设置marker.setPosition（latlng）来改变标记位置。但是在地图中它仍然显示旧位置的标记。如果有五个事件，则显示五个标记。 但是当我调整地图大小时，其他四个标记消失了，只有新位置可见。哪个是所需的输出。

  var map;
    var latlng;
    var markerMap = {};
    function loadmap() {

        latlng = new google.maps.LatLng(6.768378333333334, 79.91390166666666);
        var options = {
            zoom: 16,
            center: latlng,
            mapTypeId: google.maps.MapTypeId.ROADMAP
        }

        map = new google.maps.Map(document.getElementById("mapcanvas"), options);
    }
    function addMarker(mapId, x, y) {
        latlng = new google.maps.LatLng(x, y);
        if (markerMap[mapId] == null) {
            var marker = new google.maps.Marker({
                position: latlng,
                map: map,
                draggable: false,
                //icon: carMarkerImage,
                title: "Vehicle",
                autoPan: true
            });

            var infobulle = new google.maps.InfoWindow({
                // You can pass some content to the function like addMarker(x, y, content)
                content: "some content for your marker "+mapId
            });

            google.maps.event.addListener(marker, 'mouseover', function () {
                infobulle.open(map, marker);
            });

            markerMap[mapId] = marker;
        } else {
            var marker = markerMap[mapId];
            marker.setPosition(latlng);

        }
        goo

JAVAFX ---------

@Override
public void handle(ActionEvent event) {

    String csvFileName = csvButtonMap.get(event.getSource());
    Button button = (Button) event.getSource();

    if (!"Pause".equals(button.getText()) && !"Continue".equals(button.getText())) {
        button.setText("Pause");

        Vehicle vehicle = new Vehicle(csvFileName);
        Thread vThread = new Thread(vehicle);

        vehicle.speedPropertyProperty().addListener((v, oldValue, newVlaue) -> {
            Platform.runLater(new Runnable() {
                @Override
                public void run() {

                    double latitude = Double.parseDouble(vehicle.getLatitudeProperty());
                    double longitude = Double.parseDouble(vehicle.getLongitudeProperty());
                    String setMarker = "addMarker(" + vThread.getId() + "," + latitude + "," + longitude + ")".trim();

                    webEngine.executeScript(setMarker);

                }
            });

        });


        vThread.setDaemon(true);
        button.setId(String.valueOf(vThread.getId()));
        lockObjMap.put(vThread.getId(), new Object());
        button.getParent().setId(String.valueOf(vThread.getId()));
        statusLabel.setText("Vehicle " + csvFileName + " stared!");

        vThread.start();

这就是发生的事情。 任何的想法？