linechartdemo3.java

在软件开发中用来绘制各种图表的源码

/* -------------------
 * LineChartDemo3.java
 * -------------------
 * (C) Copyright 2003-2005, by Object Refinery Limited.
 *
 */

package demo;

import javax.swing.JPanel;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;

/**
 * This line chart demo shows many series, each displaying a different shape.
 */
public class LineChartDemo3 extends ApplicationFrame {

    /**
     * Creates a new demo.
     *
     * @param title  the frame title.
     */
    public LineChartDemo3(String title) {

        super(title);
        JPanel chartPanel = createDemoPanel();
        chartPanel.setPreferredSize(new java.awt.Dimension(500, 270));
        setContentPane(chartPanel);

    }

    /**
     * Creates a panel for the demo (used by SuperDemo.java).
     * 
     * @return A panel.
     */
    public static JPanel createDemoPanel() {
        JFreeChart chart = createChart(createDataset());
        return new ChartPanel(chart);
    }
    
    private static XYDataset createDataset() {
        XYSeriesCollection dataset = new XYSeriesCollection();
        for (int i = 0; i < 10; i++) {
            XYSeries series = new XYSeries("S" + i);
            for (int j = 0; j < 10; j++) {
                series.add(j, Math.random() * 100);
            }
            dataset.addSeries(series);
        }
        return dataset;        
    }
    
    /**
     * Creates a chart.
     * 
     * @param dataset  a dataset.
     * 
     * @return A chart based on the supplied dataset.
     */
    private static JFreeChart createChart(XYDataset dataset) {
    
        JFreeChart chart = ChartFactory.createXYLineChart(
            "Line Chart Demo 3",      // chart title
            "X",                      // x axis label
            "Y",                      // y axis label
            dataset,                  // data
            PlotOrientation.VERTICAL, 
            true,                     // include legend
            true,                     // tooltips
            false                     // urls
        );

        // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...

        // get a reference to the plot for further customisation...
        XYPlot plot = (XYPlot) chart.getPlot();
        XYLineAndShapeRenderer renderer 
            = (XYLineAndShapeRenderer) plot.getRenderer();
        renderer.setShapesVisible(true);
        renderer.setBaseShapesFilled(true);
        renderer.setDrawOutlines(true);
        
        // change the auto tick unit selection to integer units only...
        NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
        rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
    
        return chart;
    }
    
    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        LineChartDemo3 demo = new LineChartDemo3("Line Chart Demo 3");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}