Java-JFreeChart示例

Posted 2021-02-27

import java.awt.Font;
 
import javax.swing.JFrame;
import javax.swing.JPanel;
 
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PiePlot;
import org.jfree.data.general.DefaultPieDataset;
 
public class jfcExample extends JFrame
{
	private static final long serialVersionUID = 1L;
 
	private DefaultPieDataset dataset;
	private JFreeChart jfc;
 
	public jfcExample()
	{
		dataset = new DefaultPieDataset();
	}
 
	public void setValue(String title, Double numDouble)
	{
		dataset.setValue(title, numDouble);
	}
 
	public void setChar(String title)
	{
		jfc = ChartFactory.createPieChart(title, dataset, true, true, false);
 
		PiePlot pp = (PiePlot) jfc.getPlot();
		pp.setSectionOutlinesVisible(false);
		pp.setLabelFont(new Font("SansSerif", Font.PLAIN, 12));
		pp.setNoDataMessage("Nessun Dato Inserito");
		pp.setCircular(false);
		pp.setLabelGap(0.02);
	}
 
	private JPanel createPanel()
	{
		return new ChartPanel(jfc);
	}
 
	public void Show()
	{
		setContentPane(createPanel());
		setVisible(true);
	}
 
	public static void main(String[] args)
	{
		jfcExample j = new jfcExample();
		j.setTitle("Example Chart...");
		j.setSize(640, 430);
 
		j.setValue("UNO", new Double(20.0));
		j.setValue("DUE", new Double(10.0));
		j.setValue("TRE", new Double(20.0));
		j.setValue("QUATTRO", new Double(30.0));
		j.setValue("CINQUE", new Double(20.0));
 
		j.setChar("Example Chart...");
 
		j.Show();
	}
}