/** Create the chart */ private void createChart() { if (chartPanel != null) { return; } MyHistogramDataset dataset = new MyHistogramDataset(); chart = ChartFactory.createHistogram( "Histogram", null, null, dataset, PlotOrientation.VERTICAL, true, false, false); chart.getXYPlot().setForegroundAlpha(0.75f); plot = (XYPlot) chart.getPlot(); initXYPlot(plot); chartPanel = doMakeChartPanel(chart); }