import statdialog.statistics.graphics.QuantitativeDataPlotDialog;

st = new String[]{"Class A", "Class B", "Class C"};

new QuantitativeDataPlotDialog("Histogram", st).

quantitativeDataPlotDialog.setVisible(true);

new QuantitativeDataPlotDialog("Ogive", st).

quantitativeDataPlotDialog.setVisible(true);

new QuantitativeDataPlotDialog("Box", st).

quantitativeDataPlotDialog.setVisible(true);

Results: