如何在java的jfreechart中从范围轴获取后在域轴上设置刻度单位？

Question

我在Java有点新。

现在，我正在尝试使用JFreeChart绘制XYPlot，其中域轴（X轴）和范围轴（Y轴）包含相同的范围。但不幸的是，滴答单位是不同的！出于这个原因，我尝试使用NumberAxis根据范围轴上的范围和刻度单位在域轴上设置范围和刻度单位。但差异仍然存在。我仍然无法找出为什么会发生这种情况。

我正在附加此绘图的代码。此外，我正在附加问题的屏幕截图以及我真正想要的！请指导我在这里做错了什么...

    XYSeriesCollection lineChartDataAD = new XYSeriesCollection();

    XYSeries seriesAD = new XYSeries("Real Surface Heights", false, true);

    for (int m = 0; m < pt.delayedy.length - 1; m++) {

        seriesAD.add((double)pt.delayedy[m], (double)pt.delayedy[m+1]);

    }

    lineChartDataAD.addSeries(seriesAD);               

    if (jRadioButton10.isSelected()) { //as it is       checkbox2.getState() == true

        pt.xaxisAD = pt.yvar+" ("+pt.xvar+") ["+pt.yunit+"]";

        pt.yaxisADsupport = String.format("%f", (pt.xspace*pt.delay));

        //pt.yaxisAD = pt.yvar +" (i+"+pt.yaxisADsupport+")";

        pt.yaxisAD = pt.yvar+" ("+pt.xvar+"+d) ["+pt.yunit+"]";

        jLabel44.setText("(Delay (d) = "+pt.yaxisADsupport+" "+pt.xunit+")");

    }

    else if (jRadioButton11.isSelected()) { //as time series  checkbox1.getState() == true

        //pt.yaxisAD = pt.yvar +" (i+"+pt.delay+")";

        pt.xaxisAD = pt.yvar+" (i) ["+pt.yunit+"]";

        pt.yaxisAD = pt.yvar +" (i+d) ["+pt.yunit+"]";

        jLabel44.setText("(Delay (d) = "+pt.delay+")");

    }

    JFreeChart lineChartAD = ChartFactory.createXYLineChart("", pt.xaxisAD, pt.yaxisAD, (XYDataset) lineChartDataAD, PlotOrientation.VERTICAL, false, false, false);

    XYPlot plotAD  = lineChartAD.getXYPlot();

    NumberAxis D = (NumberAxis) plotAD.getDomainAxis();

    NumberAxis R = (NumberAxis) plotAD.getRangeAxis();

    D.setRange(R.getRange());

    D.setTickUnit(R.getTickUnit());                

    XYLineAndShapeRenderer rendererAD = new XYLineAndShapeRenderer();

问题||的屏幕截图刻度单位不同

所需结果||的屏幕截图两个轴上的刻度单位相同

Answer 1

最后，我有一个解决这个问题的解决方法！而我还不知道这个问题的确切解决方案。而不是尝试以下代码行，NumberAxis D = (NumberAxis) plotAD.getDomainAxis();&nbsp;NumberAxis R = (NumberAxis) plotAD.getRangeAxis();&nbsp;D.setRange(R.getRange());&nbsp;D.setTickUnit(R.getTickUnit());我尝试了以下代码行：//getting the number axes from the plotNumberAxis D = (NumberAxis) plotAD.getDomainAxis();NumberAxis R = (NumberAxis) plotAD.getRangeAxis();//creating custom tick units based on lower and upper boundDouble DT = (D.getUpperBound() - D.getLowerBound())/5;DecimalFormat DF = new DecimalFormat("#.#");DF.setRoundingMode(RoundingMode.FLOOR);String DTS = DF.format(DT);DT = Double.parseDouble(DTS);D.setTickUnit(new NumberTickUnit(DT));Double RT = (R.getUpperBound() - R.getLowerBound())/5;String RTS = DF.format(RT);RT = Double.parseDouble(RTS);R.setTickUnit(new NumberTickUnit(RT));它的工作原理!!!请参阅下面附带的屏幕截图，这就是我想要的，两个轴上的相同刻度单位...下面还给出了这种绘图的完整代码（可能会增加一些代码行，但我很高兴它适用于任何情况，直到我得到这个问题的确切解决方案）：//Creating XYseries based on an array (i.e., pt.delayedy)XYSeriesCollection lineChartDataAD = new XYSeriesCollection();XYSeries seriesAD = new XYSeries("Real Surface Heights", false, true);for (int m = 0; m < pt.delayedy.length - 1; m++) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp; seriesAD.add((double)pt.delayedy[m], (double)pt.delayedy[m+1]);}lineChartDataAD.addSeries(seriesAD);//Customizing my axis labels (required for my purpose)if (jRadioButton10.isSelected()) {&nbsp; &nbsp;pt.xaxisAD = pt.yvar+" ("+pt.xvar+") ["+pt.yunit+"]";&nbsp; &nbsp;pt.yaxisADsupport = String.format("%f", (pt.xspace*pt.delay));&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp;pt.yaxisAD = pt.yvar+" ("+pt.xvar+"+d) ["+pt.yunit+"]";&nbsp; &nbsp; &nbsp;&nbsp;}else if (jRadioButton11.isSelected()) {&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp;pt.xaxisAD = pt.yvar+" (i) ["+pt.yunit+"]";&nbsp; &nbsp;pt.yaxisAD = pt.yvar +" (i+d) ["+pt.yunit+"]";&nbsp; &nbsp;jLabel44.setText("(Delay (d) = "+pt.delay+")");}//Creating a JFreechart with my labels and seriesJFreeChart lineChartAD = ChartFactory.createXYLineChart("", pt.xaxisAD, pt.yaxisAD, (XYDataset) lineChartDataAD, PlotOrientation.VERTICAL, false, false, false);//Getting the chart plotXYPlot plotAD&nbsp; = lineChartAD.getXYPlot();//Creating the renderer for the chartXYLineAndShapeRenderer rendererAD = new XYLineAndShapeRenderer();rendererAD.setSeriesPaint(0, Color.BLACK);double sizeAD = 0;double deltaAD = sizeAD / 2.0;Shape shapeAD = new Rectangle2D.Double(-deltaAD, -deltaAD, sizeAD, sizeAD);rendererAD.setSeriesShape(0, shapeAD);rendererAD.setSeriesStroke(0, new BasicStroke(1.0f));//Customizing the font of the axes labelsFont F1AD = new Font ("Times New Roman", Font.PLAIN, 14);&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;plotAD.getDomainAxis().setLabelFont(F1AD);plotAD.getRangeAxis().setLabelFont(F1AD);//The below lines are for exact same x-scaling and y-scaling in plotNumberAxis D = (NumberAxis) plotAD.getDomainAxis();NumberAxis R = (NumberAxis) plotAD.getRangeAxis();D.setAutoRangeIncludesZero(false);R.setAutoRangeIncludesZero(false);Double DT = (D.getUpperBound() - D.getLowerBound())/5;DecimalFormat DF = new DecimalFormat("#.#");DF.setRoundingMode(RoundingMode.FLOOR);String DTS = DF.format(DT);DT = Double.parseDouble(DTS);D.setTickUnit(new NumberTickUnit(DT));Double RT = (R.getUpperBound() - R.getLowerBound())/5;String RTS = DF.format(RT);RT = Double.parseDouble(RTS);R.setTickUnit(new NumberTickUnit(RT));//Plot customizationplotAD.setOutlinePaint(Color.BLACK);plotAD.setOutlineStroke(new BasicStroke(0.5f));plotAD.setRenderer(rendererAD);plotAD.setBackgroundPaint(Color.WHITE);plotAD.setRangeGridlinesVisible(true);plotAD.setRangeGridlinePaint(Color.GRAY);plotAD.setDomainGridlinesVisible(true);plotAD.setDomainGridlinePaint(Color.GRAY);//Creating ChartPanelChartPanel linePanelAD = new ChartPanel(lineChartAD, true, true, false, false, true);linePanelAD.setMouseZoomable(false);//Adding the ChartPanel to the JPanel&nbsp;panelChartRMA4D.removeAll();panelChartRMA4D.add(linePanelAD, BorderLayout.CENTER);panelChartRMA4D.setVisible(true);panelChartRMA4D.setBorder(new LineBorder (Color.BLACK));panelChartRMA4D.validate();