public XYChart.Series<String,Double> data(JsonArray ja){
    XYChart.Series<String,Double> tempOnChart = new XYChart.Series<>();
    Collection<Data<String,Double>> samples = new ArrayList<>(ja.size());
    for(int i =0; i < ja.size();i++){
        JsonElement k = ja.get(i);
        double d = k.getAsJsonObject().get("Temperature").getAsDouble();
        System.out.println(d);
        XYChart.Data data1 = new XYChart.Data(String.valueOf(i),d);
        samples.add(data1);
    }
    tempOnChart.getData().addAll(samples);
    return  tempOnChart;
}