case LINE_CHART:
dataset = new CategoryDataset();
plot = new LinePlot();
break;
case PIE_CHART:
dataset = new PieDataset();
plot = new PiePlot();
break;
case PIE3D_CHART:
dataset = new PieDataset();
plot = new Pie3DPlot();
break;
case TIMESERIES_CHART:
dataset = new TimeSeriesDataset();
plot = new TimeSeriesPlot();