?? ringchartdemo1.java
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/* -------------------
* RingChartDemo1.java
* -------------------
* (C) Copyright 2005, by Object Refinery Limited.
*
*/
package demo;
import java.awt.Font;
import javax.swing.JPanel;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.RingPlot;
import org.jfree.data.general.DefaultPieDataset;
import org.jfree.data.general.PieDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RefineryUtilities;
/**
* A simple demonstration application showing how to create a ring chart using
* data from a {@link DefaultPieDataset}.
*/
public class RingChartDemo1 extends ApplicationFrame {
/**
* Default constructor.
*
* @param title the frame title.
*/
public RingChartDemo1(String title) {
super(title);
JPanel panel = createDemoPanel();
panel.setPreferredSize(new java.awt.Dimension(500, 270));
setContentPane(panel);
}
/**
* Creates a sample dataset.
*
* @return a sample dataset.
*/
private static PieDataset createDataset() {
DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("One", new Double(43.2));
dataset.setValue("Two", new Double(10.0));
dataset.setValue("Three", new Double(27.5));
dataset.setValue("Four", new Double(17.5));
dataset.setValue("Five", new Double(11.0));
dataset.setValue("Six", new Double(19.4));
return dataset;
}
/**
* Creates a chart.
*
* @param dataset the dataset.
*
* @return a chart.
*/
private static JFreeChart createChart(PieDataset dataset) {
JFreeChart chart = ChartFactory.createRingChart(
"Ring Chart Demo 1", // chart title
dataset, // data
false, // include legend
true,
false
);
RingPlot plot = (RingPlot) chart.getPlot();
plot.setLabelFont(new Font("SansSerif", Font.PLAIN, 12));
plot.setNoDataMessage("No data available");
plot.setCircular(false);
plot.setLabelGap(0.02);
return chart;
}
/**
* 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);
}
/**
* Starting point for the demonstration application.
*
* @param args ignored.
*/
public static void main(String[] args) {
RingChartDemo1 demo = new RingChartDemo1("Ring Chart Demo 1");
demo.pack();
RefineryUtilities.centerFrameOnScreen(demo);
demo.setVisible(true);
}
}
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