问没有垂直轴和水平线网格的XYPlot？

EN

NumberFormat currency = NumberFormat.getCurrencyInstance();
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setNumberFormatOverride(currency);

  // create a dataset...
  XYSeries series = new XYSeries("Random Data");
  series.add(1.0, 500.2);
  series.add(10.0, 694.1);

  // Create an XY Line chart
  XYSeriesCollection data = new XYSeriesCollection(series);
  JFreeChart chart = ChartFactory.createXYLineChart("XY Series Demo",
                                                    null,
                                                    "Y",
                                                    data,
                                                    PlotOrientation.VERTICAL,
                                                    true,
                                                    true,
                                                    false);
  XYPlot plot = (XYPlot) chart.getPlot();
  plot.setDomainGridlinesVisible(false);