intervalbarchartdemo1.java

大家打开看看啊, 很有用的东西

/* ======================================
 * JFreeChart : a free Java chart library
 * ======================================
 *
 * Project Info:  http://www.jfree.org/jfreechart/index.html
 * Project Lead:  David Gilbert ([e-mail]);
 *
 * (C) Copyright 2000-2003, by Object Refinery Limited and Contributors.
 *
 * This library is free software; you can redistribute it and/or modify it under the terms
 * of the GNU Lesser General Public License as published by the Free Software Foundation;
 * either version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * --------------------------
 * IntervalBarChartDemo1.java
 * --------------------------
 * (C) Copyright 2002, 2003, by Jeremy Bowman and Contributors.
 *
 * Original Author:  Jeremy Bowman.
 * Contributor(s):   David Gilbert (for Object Refinery Limited);
 *
 * $Id: IntervalBarChartDemo1.java,v 1.5 2003/07/16 14:16:51 mungady Exp $
 *
 * Changes
 * -------
 * 29-Apr-2002 : Version 1, contributed by Jeremy Bowman.  Name changed to
 *               IntervalBarChartDemo, and the chart is displayed in a frame rather than
 *               saved to a file (DG);
 * 25-Jun-2002 : Removed unnecessary imports (DG);
 * 10-Oct-2002 : Fixed errors reported by Checkstyle (DG);
 *
 */

package org.jfree.chart.demo;

import java.awt.Color;
import java.awt.Font;
import java.text.DecimalFormat;

import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.NumberTickUnit;
import org.jfree.chart.labels.IntervalCategoryItemLabelGenerator;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.IntervalBarRenderer;
import org.jfree.chart.renderer.ItemLabelAnchor;
import org.jfree.data.DefaultIntervalCategoryDataset;
import org.jfree.ui.TextAnchor;

/**
 * An interval bar chart.
 *
 * @author Jeremy Bowman
 */
public class IntervalBarChartDemo1 {

    /** The categories. */
    private static final String[] CATEGORIES = {"1", "3", "5", "10", "20"};

    /** The label font. */
    private static Font labelFont = null;

    /** The title font. */
    private static Font titleFont = null;

    /** The chart. */
    private JFreeChart chart = null;

    static {
        labelFont = new Font("Helvetica", Font.PLAIN, 10);
        titleFont = new Font("Helvetica", Font.BOLD, 14);
    }

    /**
     * Creates a new demo.
     */
    public IntervalBarChartDemo1() {

        DefaultIntervalCategoryDataset data = null;
        double[][] lows = {{-.0315, .0159, .0306, .0453, .0557}};
        double[][] highs = {{.1931, .1457, .1310, .1163, .1059}};
        data = new DefaultIntervalCategoryDataset(lows, highs);
        data.setCategoryKeys(CATEGORIES);

        String title = "Strategie Sicherheit";
        String xTitle = "Zeitraum (in Jahren)";
        String yTitle = "Performance";
        CategoryAxis xAxis = new CategoryAxis(xTitle);
        xAxis.setLabelFont(titleFont);
        xAxis.setTickLabelFont(labelFont);
        xAxis.setTickMarksVisible(false);
        NumberAxis yAxis = new NumberAxis(yTitle);
        yAxis.setLabelFont(titleFont);
        yAxis.setTickLabelFont(labelFont);
        yAxis.setMinimumAxisValue(-0.2);
        yAxis.setMaximumAxisValue(0.40);
        DecimalFormat formatter = new DecimalFormat("0.##%");
        yAxis.setTickUnit(new NumberTickUnit(0.05, formatter));

        IntervalBarRenderer renderer = new IntervalBarRenderer();
        renderer.setSeriesPaint(0, new Color(51, 102, 153));
        renderer.setItemLabelGenerator(new IntervalCategoryItemLabelGenerator());
        renderer.setItemLabelsVisible(Boolean.TRUE);
        renderer.setItemLabelAnchor(ItemLabelAnchor.CENTER);
        renderer.setItemLabelTextAnchor(TextAnchor.CENTER);

        CategoryPlot plot = new CategoryPlot(data, xAxis, yAxis, renderer);
        plot.setBackgroundPaint(Color.lightGray);
        plot.setOutlinePaint(Color.white);
        plot.setOrientation(PlotOrientation.VERTICAL);
        
        chart = new JFreeChart(title, titleFont, plot, false);
        chart.setBackgroundPaint(Color.white);
    }

    /**
     * Returns the chart.
     *
     * @return the chart.
     */
    public JFreeChart getChart() {
        return chart;
    }

    /**
     * Starting point for the demo.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {
        IntervalBarChartDemo1 sample = new IntervalBarChartDemo1();
        JFreeChart chart = sample.getChart();
        ChartFrame frame = new ChartFrame("Interval Bar Chart Demo", chart);
        frame.pack();
        frame.setVisible(true);
    }
}