Question

第一个：我真的遇到了JFreechart的问题，主要是我真的相信这是我的错，因为我开始使用该库而没有完全理解它是如何完全运行或使用的第二个：这些是帮助我的一些有用的资源：

我目前的状态：我的问题在于使用drawPrimaryLine() 在我已经建立的项目中，所以我仍然遇到连接点的问题以我的方式，而不是顺序方式

示例：如果我按此顺序输入（10,10）和（15,15）以及（20,20）和（25,25），这就是我最终会得到的结果（左侧没有连接，右侧连接）

我的问题是： 1 - 当在右侧显示绘制线条时，我不希望生成或创建线条，直到添加了所有点并且点击了完成的按钮*显示在最右下方< / p>

2 - 我不希望显示行按顺序排列我希望根据某些算法显示该行，并且不是所有的点都有或者一条线将通过它，只有一行会在某些情况下通过。因此，总而言之：并非所有的点都只基于算法连接一些。

这是我的代码：

public class x_y_2 extends JFrame {

private static final String title = "Connecting The Dots";
private XYSeries added = new XYSeries("Added");
public List ls  = new LinkedList<XYSeries>();
private XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
final XYSeriesCollection dataset = new XYSeriesCollection();

private XYPlot plot ;



public x_y_2(String s) {
    super(s);
    final ChartPanel chartPanel = createDemoPanel();
    this.add(chartPanel, BorderLayout.CENTER);
    JPanel control = new JPanel();

    JLabel label = new JLabel("Enter 'x' value");
    JTextField Field_x = new JTextField();
    Field_x.setPreferredSize( new Dimension( 100, 24 ));

    JLabel label2 = new JLabel("Enter 'y' value");
    JTextField Field_y = new JTextField();
    JLabel error = new JLabel("Importent*** in case no value is entered,value  is set to '1' ");
    error.setForeground(Color.RED);
    Field_y.setPreferredSize( new Dimension( 100, 24 ));

    control.add(label);
    control.add(Field_x);
    control.add(label2);
    control.add(Field_y);

    control.add(new JButton(new AbstractAction("Add") {

        @Override
        public void actionPerformed(ActionEvent e) {
                if (Field_x.getText().isEmpty()) {
                    Field_x.setText("1"); ; 
                }
                if (Field_y.getText().isEmpty()) {
                    Field_y.setText("1"); 
                }
            Double x = Double.parseDouble(Field_x.getText());
            Double y = Double.parseDouble(Field_y.getText());

            added.add(x,y);
            ls.add(added);

            Field_x.setText("");
            Field_y.setText("");       
        }
    }));
    control.add(error);

    control.add(new JButton(new AbstractAction("Done..") {

        @Override
        public void actionPerformed(ActionEvent e) {
            label.setVisible(false);
            label2.setVisible(false);
            Field_x.setVisible(false);
            Field_y.setVisible(false);
            error.setVisible(false);
            PrimaryLine pr = new PrimaryLine(3);
            GraphingData graphingdata = new GraphingData(2,4,2,10);
   //         pr.drawPrimaryLine(state, g2, plot, dataset, pass, series, item, domainAxis, rangeAxis, dataArea);
            System.out.println(ls.size());
            for (int i = 0 ; i < ls.size() ; i++) {
                XYSeries xy = (XYSeries)ls.get(i);
                System.out.println(xy.getX(i) +" "+xy.getY(i));
            }       
        }
    }));
    this.add(control, BorderLayout.SOUTH);
}
private XYDataset createSampleData() {
    dataset.addSeries(added);
    return dataset;
}
private ChartPanel createDemoPanel() {
    JFreeChart jfreechart = ChartFactory.createXYLineChart(
        title, "X", "Y", createSampleData(),PlotOrientation.VERTICAL, true, true, false);
            plot    =jfreechart.getXYPlot();
            renderer.setSeriesLinesVisible(0, true);
        renderer.setSeriesShapesVisible(0, true);            
        plot.setRenderer(renderer);
            return new ChartPanel(jfreechart);
 }}

第二课：公共类GraphingData扩展了JPanel {

   double x_st , y_st , x_ed, y_ed = 0;
   public Graphics2D g2 ;
   public GraphingData(double x_st,double y_st,double x_ed,double y_ed) {
    this.x_st = x_st ; 
    this.y_st = y_st;
    this.x_ed = x_ed;
    this.y_ed = y_ed;
}

protected void paintComponent(Graphics g) {
    super.paintComponent(g);
    g2 = (Graphics2D)g;
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);

    g2.draw(new Line2D.Double(x_st,y_st,x_ed, y_ed));

}
    }

第三类：

   public class PrimaryLine extends XYLineAndShapeRenderer {
    private final int anchor;

    public PrimaryLine(int acnchor) {
        this.anchor = acnchor;
    }

    @Override
    protected void drawPrimaryLine(XYItemRendererState state, Graphics2D g2,
        XYPlot plot, XYDataset dataset, int pass, int series, int item,
        ValueAxis domainAxis, ValueAxis rangeAxis, Rectangle2D dataArea) {
        if (item == anchor) {
            return;
        }
    }


    public  void chart() {
        PrimaryLine r = new PrimaryLine(8);
        XYPlot plot = new XYPlot(createSampleData(),new NumberAxis("X"), new 
        NumberAxis("Y"), r);
            JFreeChart chart = new JFreeChart(plot);
    }


   private XYDataset createSampleData() {
   XYSeriesCollection xySeriesCollection = new XYSeriesCollection();
   XYSeries added = new XYSeries("added");
   added.add(4,2);
   added.add(2,1);
   xySeriesCollection.addSeries(added);
   return xySeriesCollection;
   }
  }

我会很乐意为你提供任何帮助。

如何将JFreeChart用于自定义渲染器

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