Ideally in JFreeChart you would create this chart using a dataset that implements the IntervalCategoryDataset interface and a renderer that can render both the bars and the median markers directly from that data. However, the main implementation of that dataset interface is a bit cumbersome to use and there is not renderer that draws exactly the visual representation you are looking for.
The next best thing (that I can think of) is to use an overlaid chart, which allows the median markers to be overlaid on top of the bars - this requires two datasets and two renderers. Here is the result (the source code follows):
/* =======================
* OverlaidChartDemo1.java
* =======================
*
* Copyright (c) 2014, Object Refinery Limited.
* All rights reserved.
*
* http://www.jfree.org/jfreechart/index.html
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - Neither the name of the Object Refinery Limited nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL OBJECT REFINERY LIMITED BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 10-Sep-2014 : Version 1 (DG);
*
*/
package org.jfree.chart.demo;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Dimension;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.StandardChartTheme;
import org.jfree.chart.axis.AxisLocation;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.DatasetRenderingOrder;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.IntervalBarRenderer;
import org.jfree.chart.renderer.category.LevelRenderer;
import org.jfree.chart.renderer.category.StandardBarPainter;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.data.category.DefaultIntervalCategoryDataset;
import org.jfree.data.category.IntervalCategoryDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* A sample application for the Stack Overflow question
* http://stackoverflow.com/questions/25772655/how-do-i-draw-a-short-line-over-a-bar-on-an-xyplot-using-xybarrenderer.
*/
public class OverlaidChartDemo1 extends ApplicationFrame {
/**
* Creates a new demo instance.
*
* @param title the frame title.
*/
public OverlaidChartDemo1(String title) {
super(title);
CategoryDataset dataset = createDataset1();
JFreeChart chart = createChart(dataset);
ChartPanel chartPanel = new ChartPanel(chart, false);
chartPanel.setFillZoomRectangle(true);
chartPanel.setMouseWheelEnabled(true);
chartPanel.setPreferredSize(new Dimension(600, 480));
setContentPane(chartPanel);
}
private static IntervalCategoryDataset createDataset1() {
double[] start = new double[] { -4.1, -2.2, -2.1, -1.2, -0.4,
-0.2, -0.1, -0.15, 0, -0.1, -0.1, 0, 0, 0, 0 };
double[] end = new double[] { 2.9, 3.6, 3.3, 2.5, 2.8, 2, 2.1, 2, 2,
1.8, 1.7, 1.8, 1.6, 1.2, 1.2 };
DefaultIntervalCategoryDataset dataset
= new DefaultIntervalCategoryDataset(new double[][]{ start },
new double[][]{ end });
dataset.setCategoryKeys(new String[] { "Dedicated Short Bias",
"Managed Futures", "S&P 500", "Long/Short Equity",
"Emerging Markets", "Convertible Arbitrage",
"Event Driven - Multi Strategy", "Event Driven",
"DJ/Credit Suisse Hedge Fund Index",
"Event Driven - Distressed", "Multi-Strategy", "Global Macro",
"Fixed Income Arbitrage", "Event Driven - Risk Arbitrage",
"Equity Market Neutral"});
return dataset;
}
private static CategoryDataset createDataset2() {
DefaultCategoryDataset dataset = new DefaultCategoryDataset();
dataset.addValue(-1.3, "S1", "Dedicated Short Bias");
dataset.addValue(0.7, "S1", "Managed Futures");
dataset.addValue(1.2, "S1", "S&P 500");
dataset.addValue(1.1, "S1", "Long/Short Equity");
dataset.addValue(1.4, "S1", "Emerging Markets");
dataset.addValue(1.05, "S1", "Convertible Arbitrage");
dataset.addValue(1.2, "S1", "Event Driven - Multi Strategy");
dataset.addValue(1.1, "S1", "Event Driven");
dataset.addValue(0.7, "S1", "DJ/Credit Suisse Hedge Fund Index");
dataset.addValue(1, "S1", "Event Driven - Distressed");
dataset.addValue(0.8, "S1", "Multi-Strategy");
dataset.addValue(1.2, "S1", "Global Macro");
dataset.addValue(0.8, "S1", "Fixed Income Arbitrage");
dataset.addValue(0.5, "S1", "Event Driven - Risk Arbitrage");
dataset.addValue(0.6, "S1", "Equity Market Neutral");
return dataset;
}
/**
* Creates a sample chart.
*
* @param dataset the dataset.
*
* @return The chart.
*/
private static JFreeChart createChart(CategoryDataset dataset) {
CategoryAxis xAxis = new CategoryAxis(null);
ValueAxis yAxis = new NumberAxis("Monthly Return (%)");
IntervalBarRenderer renderer = new IntervalBarRenderer();
renderer.setBarPainter(new StandardBarPainter());
renderer.setSeriesPaint(0, new Color(10, 12, 118));
renderer.setShadowVisible(false);
CategoryPlot plot = new CategoryPlot(dataset, xAxis, yAxis, renderer);
plot.setOrientation(PlotOrientation.HORIZONTAL);
plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);
plot.setBackgroundPaint(new Color(230, 230, 230));
plot.setRangeGridlinePaint(Color.WHITE);
plot.setRangeGridlineStroke(new BasicStroke(0.5f));
// overlay a second dataset
plot.setDataset(1, createDataset2());
LevelRenderer renderer2 = new LevelRenderer();
renderer2.setSeriesStroke(0, new BasicStroke(4.0f,
BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
renderer2.setSeriesPaint(0, Color.RED);
plot.setRenderer(1, renderer2);
plot.setDatasetRenderingOrder(DatasetRenderingOrder.FORWARD);
JFreeChart chart = new JFreeChart(
"Interquartile Range and Median: Monthly Returns", plot);
chart.removeLegend();
chart.setBackgroundPaint(Color.WHITE);
return chart;
}
/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(String[] args) {
OverlaidChartDemo1 demo = new OverlaidChartDemo1(
"JFreeChart: OverlaidChartDemo1.java");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
