[ Java 代碼範本 ] JFreeChart : XYChart - XYTaskData set (1)

來源自 這裡
UI 效果: (jfreechart-1.0.14)


範例代碼:
- ScatterPlotDemo1.java

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1. package charts.xy;  
2.   
3. import java.awt.Color;  
4.   
5. import javax.swing.JPanel;  
6.   
7. import org.jfree.chart.ChartFactory;  
8. import org.jfree.chart.ChartPanel;  
9. import org.jfree.chart.JFreeChart;  
10. import org.jfree.chart.axis.NumberAxis;  
11. import org.jfree.chart.plot.PlotOrientation;  
12. import org.jfree.chart.plot.XYPlot;  
13. import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;  
14. import org.jfree.data.xy.XYDataset;  
15. import org.jfree.data.xy.XYSeries;  
16. import org.jfree.data.xy.XYSeriesCollection;  
17. import org.jfree.ui.ApplicationFrame;  
18. import org.jfree.ui.RefineryUtilities;  
19.   
20. public class ScatterPlotDemo1 extends ApplicationFrame {  
21.   
22.     /** 
23.      * A demonstration application showing a scatter plot. 
24.      * 
25.      * @param title  the frame title. 
26.      */  
27.     public ScatterPlotDemo1(String title) {  
28.         super(title);  
29.         JPanel chartPanel = createDemoPanel();  
30.         chartPanel.setPreferredSize(new java.awt.Dimension(550, 350));  
31.         setContentPane(chartPanel);  
32.     }  
33.   
34.     private static XYDataset createData()  
35.     {  
36.         XYSeriesCollection my_data_series= new XYSeriesCollection();  
37.         XYSeries s = new XYSeries("Cluster1");  
38.         s.add(1,1);  
39.         s.add(2,2);  
40.         s.add(3,1);  
41.         s.add(2,4);  
42.         my_data_series.addSeries(s);  
43.         s = new XYSeries("Cluster2");  
44.         s.add(2,14);  
45.         s.add(3,13);  
46.         s.add(3,14);  
47.         my_data_series.addSeries(s);  
48.         s = new XYSeries("Cluster3");  
49.         s.add(11,4);  
50.         s.add(12,4);  
51.         s.add(13,4);  
52.         s.add(14,4);  
53.         my_data_series.addSeries(s);  
54.         s = new XYSeries("Cluster4");  
55.         s.add(12,13);  
56.         s.add(13,12);  
57.         s.add(13,13);  
58.         s.add(14,14);  
59.         my_data_series.addSeries(s);  
60.         return my_data_series;  
61.     }  
62.       
63.     private static JFreeChart createChart(XYDataset dataset) {  
64.         JFreeChart chart = ChartFactory.createScatterPlot("Scatter Plot Demo 1",  
65.                 "X", "Y", dataset, PlotOrientation.VERTICAL, true, false, false);  
66.   
67.         XYPlot plot = (XYPlot) chart.getPlot();  
68.         plot.setNoDataMessage("NO DATA");  
69.         plot.setDomainZeroBaselineVisible(true);  
70.         plot.setRangeZeroBaselineVisible(true);  
71.           
72.         XYLineAndShapeRenderer renderer   
73.                 = (XYLineAndShapeRenderer) plot.getRenderer();  
74.         renderer.setSeriesOutlinePaint(0, Color.black);  
75.         renderer.setUseOutlinePaint(true);  
76.         NumberAxis domainAxis = (NumberAxis) plot.getDomainAxis();  
77.         domainAxis.setAutoRangeIncludesZero(false);  
78.         domainAxis.setTickMarkInsideLength(2.0f);  
79.         domainAxis.setTickMarkOutsideLength(0.0f);  
80.           
81.         NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();  
82.         rangeAxis.setTickMarkInsideLength(2.0f);  
83.         rangeAxis.setTickMarkOutsideLength(0.0f);  
84.           
85.         return chart;  
86.     }  
87.       
88.     /** 
89.      * Creates a panel for the demo (used by SuperDemo.java). 
90.      *  
91.      * @return A panel. 
92.      */  
93.     public static JPanel createDemoPanel() {  
94.         JFreeChart chart = createChart(createData());  
95.         ChartPanel chartPanel = new ChartPanel(chart);  
96.         //chartPanel.setVerticalAxisTrace(true);  
97.         //chartPanel.setHorizontalAxisTrace(true);  
98.         // popup menu conflicts with axis trace  
99.         chartPanel.setPopupMenu(null);  
100.           
101.         chartPanel.setDomainZoomable(true);  
102.         chartPanel.setRangeZoomable(true);  
103.         return chartPanel;  
104.     }  
105.       
106.     /** 
107.      * Starting point for the demonstration application. 
108.      * 
109.      * @param args  ignored. 
110.      */  
111.     public static void main(String[] args) {  
112.         ScatterPlotDemo1 demo = new ScatterPlotDemo1("Scatter Plot Demo 1");  
113.         demo.pack();  
114.         RefineryUtilities.centerFrameOnScreen(demo);  
115.         demo.setVisible(true);  
116.     }  
117.   
118. }