如何在JFreechart中为点获取钻石形状

Question

我需要在JFreechart中的时间轴上获取钻石形状，但我无法做到。有人可以请指导什么代码应添加到下面的代码来实现钻石形状点，以及如何更改线的颜色？

（该方案采用RS和语句以及从DB导出，并在其他地方规定的其他事情，程序可以正常运行，现在，唯一的问题是，它看起来超级无聊。）

TimeSeries s1 = new TimeSeries("Technology", Day.class); 
TimeSeries s2 = new TimeSeries("Entertainment", Day.class); 
TimeSeries s3 = new TimeSeries("Soap", Day.class); 
TimeSeries s4 = new TimeSeries("Music", Day.class); 
TimeSeries s5 = new TimeSeries("Native", Day.class); 
TimeSeries s6 = new TimeSeries("Speciality", Day.class); 
TimeSeries s7 = new TimeSeries("Science", Day.class); 

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); 
Date plotdate; 


if (!(combo_individualid.getModel().getSize() == 0)) { 
    String sql = "" 
      + "SELECT * " 
      + "FROM `customerbasetag` " 
      + "WHERE `individual_idindividual` =? "; 

    try { 
     stmt = conn.prepareStatement(sql); 
     stmt.setString(1, combo_individualid.getSelectedItem().toString()); 
     rs = stmt.executeQuery(); 

     while (rs.next()) { 

      try { 
       plotdate = sdf.parse(rs.getString("session_date")); 

       s1.add(new Day(plotdate), new Integer(Integer.parseInt(rs.getString("technology")))); 
       s2.add(new Day(plotdate), new Integer(Integer.parseInt(rs.getString("entertainment")))); 
       s3.add(new Day(plotdate), new Integer(Integer.parseInt(rs.getString("soap")))); 
       s4.add(new Day(plotdate), new Integer(Integer.parseInt(rs.getString("music")))); 
       s5.add(new Day(plotdate), new Integer(Integer.parseInt(rs.getString("native")))); 
       s6.add(new Day(plotdate), new Integer(Integer.parseInt(rs.getString("speciality")))); 
       s7.add(new Day(plotdate), new Integer(Integer.parseInt(rs.getString("science")))); 


      } catch (ParseException ex) { 
       JOptionPane.showMessageDialog(null, 
        "Parse Exception" + ex.getMessage()); 
      } 
     } 
    } catch (SQLException ex) { 
     JOptionPane.showMessageDialog(null, 
      "Error During Session Select" + ex.getMessage()); 
    } 


    /*NOTE: Chart plotting here*/ 
    TimeSeriesCollection dataset = new TimeSeriesCollection(); 
    dataset.addSeries(s1); 
    dataset.addSeries(s2); 
    dataset.addSeries(s3); 
    dataset.addSeries(s4); 
    dataset.addSeries(s5); 
    dataset.addSeries(s6); 
    dataset.addSeries(s7); 
    JFreeChart chart = ChartFactory.createTimeSeriesChart(
     "TS Chart", "Date", "Value", dataset, true, true, false); 

    XYPlot plot = (XYPlot) chart.getPlot(); 
    plot.setBackgroundPaint(Color.lightGray); 
    plot.setDomainGridlinePaint(Color.white); 
    plot.setRangeGridlinePaint(Color.white); 
    plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0)); 
    plot.setDomainCrosshairVisible(true); 
    plot.setRangeCrosshairVisible(true); 

    ChartFrame f = new ChartFrame("Individual Choice Evaluation", chart); 
    f.setVisible(true); 
    f.setSize(800, 600); 
    f.setLocationRelativeTo(null); 

} else { 

    JOptionPane.showMessageDialog(null, "Please Select an Individual"); 
} 

我已经更新了代码，但它仍然无法正常工作，并且我不断收回旧图表。继承人的代码。

TimeSeriesCollection dataset = new TimeSeriesCollection(); 
      dataset.addSeries(s1); 
      dataset.addSeries(s2); 
      dataset.addSeries(s3); 
      dataset.addSeries(s4); 
      dataset.addSeries(s5); 
      dataset.addSeries(s6); 
      dataset.addSeries(s7); 
      JFreeChart chart = ChartFactory.createTimeSeriesChart("Time Series Chart for Individual id: "+combo_individualid.getSelectedItem().toString() , "Date", "Value", dataset, true, true, false); 



      Shape theShape = ShapeUtilities.createDiamond(1); 


      XYPlot plot = (XYPlot) chart.getPlot(); 
      plot.setBackgroundPaint(Color.lightGray); 
      plot.setDomainGridlinePaint(Color.white); 
      plot.setRangeGridlinePaint(Color.white); 
      plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0)); 
      plot.setDomainCrosshairVisible(true); 
      plot.setRangeCrosshairVisible(true); 



      XYItemRenderer renderer = plot.getRenderer(); 

      renderer.setSeriesShape(0, theShape); 
      renderer.setSeriesShape(1, theShape); 
      renderer.setSeriesShape(2, theShape); 
      renderer.setSeriesShape(3, theShape); 
      renderer.setSeriesShape(4, theShape); 
      renderer.setSeriesShape(5, theShape); 
      renderer.setSeriesShape(6, theShape); 





      ChartFrame f = new ChartFrame("Individual Choice Evaluation", chart); 
      f.setVisible(true); 
      f.setSize(800, 600); 
      f.setLocationRelativeTo(null); 

Answer 1

ShapeUtilities.createDiamond()可以创建一个菱形;您可以将其应用于不同Shape的example中。

附录：默认情况下，createTimeSeriesChart()创建一个XYLineAndShapeRenderer，您可以修改，如下所示和here。

XYPlot plot = (XYPlot) chart.getPlot(); 
XYLineAndShapeRenderer r = (XYLineAndShapeRenderer) plot.getRenderer(); 
r.setSeriesShape(0, ShapeUtilities.createDiamond(5)); 
r.setSeriesShapesVisible(0, true); 

SSCCE：

import java.awt.Dimension; 
import java.util.Random; 
import javax.swing.JFrame; 
import org.jfree.chart.*; 
import org.jfree.chart.plot.XYPlot; 
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; 
import org.jfree.data.time.Day; 
import org.jfree.data.time.TimeSeries; 
import org.jfree.data.time.TimeSeriesCollection; 
import org.jfree.data.xy.XYDataset; 
import org.jfree.util.ShapeUtilities; 

/** @see https://stackoverflow.com/a/14822991/230513 */ 
public class Test { 

    private static final int N = 16; 
    private static final Random random = new Random(); 

    private static XYDataset createDataset() { 

     final TimeSeries series = new TimeSeries("Data"); 
     Day current = new Day(); 
     for (int i = 0; i < N; i++) { 
      series.add(current, Math.abs(random.nextGaussian())); 
      current = (Day) current.next(); 
     } 
     return new TimeSeriesCollection(series); 
    } 

    private static JFreeChart createChart(final XYDataset dataset) { 
     JFreeChart chart = ChartFactory.createTimeSeriesChart(
      "Test", "Day", "Value", dataset, false, false, false); 
     XYPlot plot = (XYPlot) chart.getPlot(); 
     XYLineAndShapeRenderer r = (XYLineAndShapeRenderer) plot.getRenderer(); 
     r.setSeriesShape(0, ShapeUtilities.createDiamond(5)); 
     r.setSeriesShapesVisible(0, true); 
     return chart; 
    } 

    public static void main(String[] args) { 

     JFrame f = new JFrame(); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     XYDataset dataset = createDataset(); 
     JFreeChart chart = createChart(dataset); 
     ChartPanel chartPanel = new ChartPanel(chart) { 

      @Override 
      public Dimension getPreferredSize() { 
       return new Dimension(630, 480); 
      } 
     }; 
     f.add(chartPanel); 
     f.pack(); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
    } 
}