JFreeChart

Question

Hi,
I have a line chart that iv created using jfreechart. The graph has six lines.when the graph comes up, there are no lines on it.This is delibrate. Iv also made six check boxes. The problem i have is that when the check boxes are checked, the lines are supposed to apear, each line corresponding to the boxes that has been checked. But the lines are'nt appearing when the boxes are checked. Please can someone help. Thank you for your help.

Answer 1

Here is the code iv written this is actually part of a bigger program
</code>
package seti;
public class Entropygraph extends JPanel implements ActionListener, ItemListener {
     JButton home;
     JButton back;
     JCheckBox Malay_Binary;
     JCheckBox English_Binary;
     JCheckBox Vizmusic_Binary;
     JCheckBox Polish_Binary;
     JCheckBox Welsh_Binary;
     JCheckBox Arecibo74b;
     boolean entdata = false;
     String entdata2;
     String entdata3 ;
     String entdata4 ;
     String entdata5 ;
     String entdata6 ;
     public Entropygraph() {
          super((new BorderLayout(40, 40)));
          JPanel topHandPanel = new JPanel();
          GridLayout gridLayout = new GridLayout(5, 100, 0, 10);
          topHandPanel.setLayout(gridLayout);
          topHandPanel.setBorder(BorderFactory.createEmptyBorder(0, 10, 10, 10));
          topHandPanel.setBackground(new Color(153, 205, 143));
          Malay_Binary = new JCheckBox("Malay");
     Malay_Binary.setMnemonic(KeyEvent.VK_C);
     Malay_Binary.setSelected(false);
     English_Binary = new JCheckBox("English");
     English_Binary.setMnemonic(KeyEvent.VK_G);
     English_Binary.setSelected(false);
     Vizmusic_Binary = new JCheckBox("Vismusic");
     Vizmusic_Binary.setMnemonic(KeyEvent.VK_M);
     Vizmusic_Binary.setSelected(false);
          Polish_Binary = new JCheckBox("Polish");
     Polish_Binary.setMnemonic(KeyEvent.VK_N);
     Polish_Binary.setSelected(false);
          Welsh_Binary = new JCheckBox("Welsh");
          Welsh_Binary.setMnemonic(KeyEvent.VK_B);
          Welsh_Binary.setSelected(false);
          Arecibo74b = new JCheckBox("Arecibo74b");
          Arecibo74b.setMnemonic(KeyEvent.VK_V);
          Arecibo74b.setSelected(false);
          home = new JButton("Home Page");
          back = new JButton("Back");
          topHandPanel.add(Malay_Binary);
          topHandPanel.add(English_Binary);
          topHandPanel.add(Vizmusic_Binary);
          topHandPanel.add(Polish_Binary);
          topHandPanel.add(Welsh_Binary);
          topHandPanel.add(Arecibo74b);
          topHandPanel.add(home);     
          topHandPanel.add(back);
          add(topHandPanel, BorderLayout.NORTH);
          final CategoryDataset edata = createDataset();
          final JFreeChart echart = createChart(edata);
          final ChartPanel chartPanel = new ChartPanel(echart);
          chartPanel.setLayout(new BorderLayout());
          chartPanel.setPreferredSize(new Dimension(1000, 450));
          add(chartPanel);
          setBorder(BorderFactory.createEmptyBorder(80, 40, 40, 40));
               //Register a listener for the check boxes.
          Malay_Binary.addItemListener(this);
          English_Binary.addItemListener(this);
          Vizmusic_Binary.addItemListener(this);
          Polish_Binary.addItemListener(this);
          Welsh_Binary.addItemListener(this);
          Arecibo74b.addItemListener(this);
          home.addActionListener(this);
          back.addActionListener(this);
     public void actionPerformed(ActionEvent ae) {
          MainPanel panel = (MainPanel) getParent();          
          if (home.equals(ae.getSource())) {
               panel.hideAll();
               panel.pageWelcome.setVisible(true);               
          } else if (back.equals(ae.getSource())) {
               panel.hideAll();
               panel.pageRead.setVisible(true);
     public void itemStateChanged(ItemEvent e) {
Object source = e.getItemSelectable();
// if (source == Malay_Binary) {
     //entdata = ;
//Now that we know which button was pushed, find out
//whether it was selected or de-selected.
// if (e.getStateChange() == ItemEvent.SELECTED) {          
     public CategoryDataset createDataset() {
          final String entdata = "Malay-Binary";
          final String entdata2 = "English-Binary";
          final String entdata3 = "Vizmusic-Binary";
          final String entdata4 = "Polish-Binary";
          final String entdata5 = "Welsh-Binary";
          final String entdata6 = "Arecibo74b";
          final String n0 = "0";
          final String n1 = "1";
          final String n2 = "2";
          final String n3 = "3";
          final String n4 = "4";
          final String n5 = "5";
          final String n6 = "6";
          final String n7 = "7";
          final String n8 = "8";
          final String n9 = "9";
          final String n10 = "10";
          final String n11 = "11";
          final String n12 = "12";
          final String n13 = "13";
          final String n14 = "14";
          final String n15 = "15";
          final DefaultCategoryDataset edata = new DefaultCategoryDataset();
          //This is all the data that is used to create
          //the Malay-Binary line chart.
// the data set has been removed so the code will fit on this post
          // This is all the data that is used to create
          // the English-Binary line chart
          // the data set has been removed so the code will fit on this post
          // This is all the data that is used to create
          // the Vizmusic-Binary line chart
     // the data set has been removed so the code will fit on this post
          // This is all the data that is used to create
          // the Polish-Binary line chart
// the data set has been removed so the code will fit on this post
          // This is all the data that is used to create
          // the Welsh-Binary line chart
     // the data set has been removed so the code will fit on this post
          // This is all the data that is used to create
          // the arecibo74b line chart
// the data set has been removed so the code will fit on this post
          return edata;
     private JFreeChart createChart(final CategoryDataset edata) {
          // create the chart...
          final JFreeChart chart = ChartFactory
                    .createLineChart(
                              "Visual Representation of the Entropy Calculation of the Incoming Digital signal",// chart
                              // title
                              "Bit Chunk Length", // x-axis label
                              "Entropic Values", // y-axis label
                              edata, // data
                              PlotOrientation.VERTICAL, // line graph position
                              true, // include legend
                              true, // this is for the tool tips
                              false
          chart.setBackgroundPaint(Color.white);
          final CategoryPlot plot = (CategoryPlot) chart.getPlot();
          plot.setBackgroundPaint(Color.black);
          plot.setRangeGridlinePaint(Color.green);
          final NumberAxis eaxis = (NumberAxis) plot.getRangeAxis();
          eaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
          eaxis.setAutoRangeIncludesZero(true);
          final LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot
                    .getRenderer();
          renderer.setSeriesVisible(1, true);
          renderer.setSeriesStroke(0, new BasicStroke(3.0f,
                    BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND, 3.0f,
          new float[] { 1.0f, 1.0f }, 0.0f));
          renderer.setSeriesStroke(0, new BasicStroke(3.0f,
                    BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND, 5.0f,
                    new float[] { 1.0f, 1.0f }, 0.0f));
          renderer.setSeriesStroke(0, new BasicStroke(3.0f,
                    BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND, 7.0f,
                    new float[] { 1.0f, 1.0f }, 0.0f));
          renderer.setSeriesStroke(0, new BasicStroke(3.0f,
                    BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND, 9.0f,
                    new float[] { 1.0f, 1.0f }, 0.0f));
          renderer.setSeriesStroke(0, new BasicStroke(3.0f,
                    BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND, 11.0f,
                    new float[] { 1.0f, 1.0f }, 0.0f));
          renderer.setSeriesStroke(0, new BasicStroke(3.0f,
                    BasicStroke.CAP_ROUND, BasicStroke.CAP_ROUND, 13.0f,
                    new float[] { 1.0f, 1.0f }, 0.0f));
          return chart;
<code>