first.java

在软件开发中用来绘制各种图表的源码

/* ----------
 * First.java
 * ----------
 * (C) Copyright 2002-2004, by Object Refinery Limited.
 *
 */

package demo;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.data.general.DefaultPieDataset;

/**
 * A simple introduction to using JFreeChart.  This demo is described in the
 * JFreeChart Developer Guide, available to purchasers of commercial support 
 * packages for JFreeChart.
 */
public class First {

    /**
     * The starting point for the demo.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        // create a dataset...
        DefaultPieDataset data = new DefaultPieDataset();
        data.setValue("Category 1", 43.2);
        data.setValue("Category 2", 27.9);
        data.setValue("Category 3", 79.5);

        // create a chart...
        JFreeChart chart = ChartFactory.createPieChart(
            "Sample Pie Chart",
            data,
            true,    // legend?
            true,    // tooltips?
            false    // URLs?
        );

        // create and display a frame...
        ChartFrame frame = new ChartFrame("First", chart);
        frame.pack();
        frame.setVisible(true);

    }

}