JavaFX real-time LineChart with time axis

Question

I\'m trying to plot real-time graph, with time axis, but I have found the LineChart constructor only has the signature.

LineChart(Axis xAxi         


        

Answer 1

The class org.jfree.chart.demo.TimeSeriesChartDemo1 is included with the distribution. It is pictured in the demo, and its source illustrates the use of the factory method ChartFactory.createTimeSeriesChart(). There's a related example here.

Answer 2

Download Ensemble sample from http://www.oracle.com/technetwork/java/javafx/samples/index.html

There are several examples in it for dynamic charts, e.g. "Advanced Stock Line Chart". You can take a look at their source code directly in the application.

To show time on axis you can use string and DateFormatter:

    BarChart<String, Number> chart = new BarChart<>(new CategoryAxis(), new NumberAxis());

    final XYChart.Series<String, Number> series1 = new XYChart.Series<>();
    chart.getData().addAll(series1);

    SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");
    Date date = new Date();
    for (int i = 0; i <= 10; i += 1) {
        date.setTime(date.getTime() + i * 11111);
        series1.getData().add(new XYChart.Data(dateFormat.format(date), Math.random() * 500));
    }