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finmath lib plot extensions provide convenient plotting methods by providing consistent wrappers to plot libraries (like JFreeChart or JavaFX).
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/*
 * (c) Copyright Christian P. Fries, Germany. All rights reserved. Contact: [email protected].
 *
 * Created on 21 May 2018
 */

package net.finmath.plots.demo;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.geom.Ellipse2D;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

import javafx.application.Platform;
import javafx.embed.swing.JFXPanel;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.layout.FlowPane;
import net.finmath.plots.Category2D;
import net.finmath.plots.GraphStyle;
import net.finmath.plots.Plot2DBarFX;
import net.finmath.plots.Plot2DFX;
import net.finmath.plots.Plotable2D;
import net.finmath.plots.PlotableCategories;
import net.finmath.plots.Point2D;

/**
 * Plots the regression estimation of a curve.
 *
 * @author Christian Fries
 */
public class SmartDerivativeContractVisualization {

	private List seriesMarketValues;
	private Plot2DBarFX plot;
	private Plot2DFX plot2;

	/**
	 * Run the demo.
	 *
	 * @param args Not used.
	 * @throws Exception Any exception.
	 */
	public static void main(final String[] args) throws Exception {

		final SmartDerivativeContractVisualization sdcVisual = new SmartDerivativeContractVisualization();
		sdcVisual.start();

		final double marginBuffer = 50;

		final Random random = new Random(3413);
		Double marketValue = 0.0;
		for(int i=0; i<100; i++) {
			final double marginCall = 90*(random).nextDouble()-45;
			marketValue += marginCall;
			sdcVisual.updateWithValue(marginBuffer, i /* Date index */, marketValue, marginCall);
			Thread.sleep(2000);
			// The null will result in no update for the market value plot
			sdcVisual.updateWithValue(marginBuffer, i, null, 0);
		}
	}

	public SmartDerivativeContractVisualization() {
		super();
	}

	public void start() throws Exception {

		seriesMarketValues = new ArrayList<>();

		plot = new Plot2DBarFX(null,
				"Smart Contract Accounts",
				"Account",
				"Value",
				new DecimalFormat("####.00"),
				0.0,
				150.0,
				10.0, false);

		plot2 = new Plot2DFX();
		plot2.setIsLegendVisible(false);
		plot2.setTitle("Market Value");
		plot2.setXAxisLabel("Date");
		plot2.setYAxisLabel("Market Value");

		SwingUtilities.invokeLater(new Runnable() {
			@Override
			public void run() {
				// This method is invoked on Swing thread
				final JFrame frame = new JFrame("FX");
				final JFXPanel fxPanel = new JFXPanel();
				frame.add(fxPanel);
				frame.setVisible(true);
				frame.setSize(1600, 600);
				//				frame.setSize(960, 540+22);

				Platform.runLater(new Runnable() {
					@Override
					public void run() {

						final FlowPane root = new FlowPane();
						root.getChildren().addAll(new Group(plot.get()), plot2.get());


						final Scene scene = new Scene(root, 1600, 600);
						scene.getStylesheets().add("barchart.css");
						fxPanel.setScene(scene);
					}
				});
			}
		});

	}

	void updateWithValue(final double base, final double x, final Double value, final double increment) throws InterruptedException {
		final List density1 = new ArrayList<>();
		density1.add(new Category2D("Us", base+Math.min(0,+increment)));
		density1.add(new Category2D("Counterpart", base+Math.min(0,-increment)));

		final List density2 = new ArrayList<>();
		density2.add(new Category2D("Us", -Math.min(0,+increment)));
		density2.add(new Category2D("Counterpart", -Math.min(0,-increment)));

		final List density3 = new ArrayList<>();
		density3.add(new Category2D("Us", Math.max(0,+increment)));
		density3.add(new Category2D("Counterpart", Math.max(0,-increment)));

		final List plotables = new ArrayList<>();
		plotables.add(new PlotableCategories() {

			@Override
			public String getName() {
				return "Margin";
			}

			@Override
			public GraphStyle getStyle() {
				return new GraphStyle(new Ellipse2D.Float(-1.0f,-1.0f,2.0f,2.0f), new BasicStroke(1.0f), new Color(0.0f, 0.0f, 1.0f));
			}

			@Override
			public List getSeries() {
				return density1;
			}
		});

		plotables.add(new PlotableCategories() {

			@Override
			public String getName() {
				return "Pay";
			}

			@Override
			public GraphStyle getStyle() {
				return null;
			}

			@Override
			public List getSeries() {
				return density2;
			}
		});
		plotables.add(new PlotableCategories() {

			@Override
			public String getName() {
				return "Receive";
			}

			@Override
			public GraphStyle getStyle() {
				return null;
				//		return new GraphStyle(new Ellipse2D.Float(-1.0f,-1.0f,2.0f,2.0f), new BasicStroke(1.0f), new Color(0.0f, 0.0f, 1.0f));
			}

			@Override
			public List getSeries() {
				return density3;
			}
		});

		plot.update(plotables);

		if(value != null) {
			final List plotables2 = new ArrayList<>();
			plotables2.add(new Plotable2D() {

				@Override
				public String getName() {
					return "Market Value";
				}

				@Override
				public GraphStyle getStyle() {
					return new GraphStyle(new Ellipse2D.Float(-3.0f,-3.0f,6.0f,6.0f), new BasicStroke(1.0f), new Color(1.0f, 0.0f, 0.0f));
				}

				@Override
				public List getSeries() {
					return seriesMarketValues;
				}
			});

			seriesMarketValues.add(new Point2D(x, value));

			plot2.update(plotables2);
		}

		Thread.sleep(500);
	}
}