code

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Line;
import javafx.stage.Stage;

import java.awt.*;
import java.util.ArrayList;
import java.util.Collections;

public class Test extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    static final int WIDTH=800, HEIGHT=400;

    @Override
    public void start(Stage primaryStage) {
        Pane container = new Pane();
        ArrayList<Integer> a = new ArrayList<Integer>();
        a.add(5);
        a.add(3);
        a.add(5);
        a.add(8);
        a.add(16);
        StackPane sp = getStackPaneFromArray(a);

        container.getChildren().add(sp);
        Scene scene = new Scene(container, 800, 400);
        primaryStage.setScene(scene);
        primaryStage.show();
    }


    static StackPane getStackPaneFromArray(ArrayList<Integer> values) {
        StackPane stackPane = new StackPane();

        int min = Collections.min(values);
        int max = Collections.max(values);

        Point previousPoint = new Point(0,HEIGHT-((values.get(0)-min)*HEIGHT/(max-min)));

        Line test = new Line(0,HEIGHT-339,200,HEIGHT-339);
        test.setStroke(Color.RED);
        stackPane.getChildren().add(test);

        for(int i=1;i<values.size();i++) {
            Line line = new Line(previousPoint.x, previousPoint.y, i*WIDTH/(values.size()-1), HEIGHT-((values.get(i)-min)*HEIGHT/(max-min)));
            stackPane.getChildren().add(line);
            System.out.println("Drawing (" + previousPoint.x + ";" + previousPoint.y + ") to (" + (i*WIDTH/(values.size()-1)) + ";" + (HEIGHT-((values.get(0)-min)*HEIGHT/(max-min))) + ")");
            previousPoint = new Point(i*WIDTH/(values.size()-1),HEIGHT-((values.get(0)-min)*HEIGHT/(max-min)));
        }
        return stackPane;
    }
}