How to connect two points in javaFX in two-axis chart - javafx

Question

In JavaFX line chart, a type of two-axis chart that presents data as a series of points connected by straight lines. All points are connected with one line. But I want to connect them with my order . Like there are three points p1(x1,y1), p2(x2,y2), p3(x3,y3) . In line chart, they are all connected with a single line , but I want connect p1,p3 and p1,p2 separately . How can I do that ? X-axis and Y-axis must present there .

Answer 1

By default JavaFX will join all points in a series. Simply solution is to use multiple series. Note you cannot share Data instances between series because Data stores a back-reference to the Node - see javafx.scene.chart.XYChart.Data.getNode()
#Override
public void start(Stage primaryStage) throws Exception {
NumberAxis xAxis1 = new NumberAxis();
NumberAxis yAxis1 = new NumberAxis();
LineChart<Number, Number> chart = new LineChart<Number, Number>(xAxis1, yAxis1);
double p1x = 0;
double p1y = 0;
double p2x = 5;
double p2y = 5;
double p3x = 3;
double p3y = 5;
Series<Number, Number> series1 = new Series<>();
series1.getData().add(new Data<>(p1x, p1y));
series1.getData().add(new Data<>(p2x, p2y));
chart.getData().add(series1);
Series<Number, Number> series2 = new Series<>();
series2.getData().add(new Data<>(p2x, p2y));
series2.getData().add(new Data<>(p3x, p3y));
chart.getData().add(series2);
primaryStage.setScene(new Scene(chart));
primaryStage.show();
}

Answer 2

I improved on #Adam answer to address your new probem:
#Override
public void start(Stage primaryStage) throws Exception {
NumberAxis xAxis1 = new NumberAxis();
NumberAxis yAxis1 = new NumberAxis();
LineChart<Number, Number> chart = new LineChart<Number, Number>(xAxis1, yAxis1);
Random random = new Random();
ArrayList<Series<Number, Number>> seriesContainer = new ArrayList();
for(int i = 0; i < 10; i++)
{
Series<Number, Number> series1 = new Series<>();
series1.getData().add(new XYChart.Data<>(random.nextDouble() * 100, random.nextDouble() * 100));
series1.getData().add(new XYChart.Data<>(random.nextDouble() * 100, random.nextDouble() * 100));
seriesContainer.add(series1);
}
chart.getData().addAll(seriesContainer);
primaryStage.setScene(new Scene(chart));
primaryStage.show();
}