谁有jfreechart做曲线折线的例子

Question

怎么没人回答了。有例子也可以发到我的Email:[email protected]

Answer 1

算了,还是给你帖到这里吧
这个是jfreechart的demo
import java.awt.*;
import javax.swing.JPanel;
import org.jfree.chart.*;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.category.CategoryDataset;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.ui.*;public class LineChartDemo1 extends ApplicationFrame
{ public LineChartDemo1(String s)
 {
     super(s);
     JPanel jpanel = createDemoPanel();
     jpanel.setPreferredSize(new Dimension(500, 270));
     setContentPane(jpanel);
 } private static CategoryDataset createDataset()
 {
     DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();
     defaultcategorydataset.addValue(212D, "Classes", "JDK 1.0");
     defaultcategorydataset.addValue(504D, "Classes", "JDK 1.1");
     defaultcategorydataset.addValue(1520D, "Classes", "SDK 1.2");
     defaultcategorydataset.addValue(1842D, "Classes", "SDK 1.3");
     defaultcategorydataset.addValue(2991D, "Classes", "SDK 1.4");
     return defaultcategorydataset;
 } private static JFreeChart createChart(CategoryDataset categorydataset)
 {
     JFreeChart jfreechart = ChartFactory.createLineChart("Java Standard Class Library", "Release", "Class Count", categorydataset, PlotOrientation.VERTICAL, false, true, false);
     jfreechart.addSubtitle(new TextTitle("Number of Classes By Release"));
     TextTitle texttitle = new TextTitle("Source: Java In A Nutshell (4th Edition) by David Flanagan (O'Reilly)");
     texttitle.setFont(new Font("SansSerif", 0, 10));
     texttitle.setPosition(RectangleEdge.BOTTOM);
     texttitle.setHorizontalAlignment(HorizontalAlignment.RIGHT);
     jfreechart.addSubtitle(texttitle);
     jfreechart.setBackgroundPaint(Color.white);
     CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();
     categoryplot.setBackgroundPaint(Color.lightGray);
     categoryplot.setRangeGridlinePaint(Color.white);
     NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();
     numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
     LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer)categoryplot.getRenderer();
     lineandshaperenderer.setShapesVisible(true);
     lineandshaperenderer.setDrawOutlines(true);
     lineandshaperenderer.setUseFillPaint(true);
     lineandshaperenderer.setFillPaint(Color.white);
     return jfreechart;
 } public static JPanel createDemoPanel()
 {
     JFreeChart jfreechart = createChart(createDataset());
     return new ChartPanel(jfreechart);
 } public static void main(String args[])
 {
     LineChartDemo1 linechartdemo1 = new LineChartDemo1("Line Chart Demo");
     linechartdemo1.pack();
     RefineryUtilities.centerFrameOnScreen(linechartdemo1);
     linechartdemo1.setVisible(true);
 }
}

Answer 2

JFreechart自带的演示程序里面说明得非常详细，你可以用一个反编译器弄出来看看。

Answer 3

非常感谢echomyf(ECHO) ，也感谢dbyang() 。谢谢所有回帖的人