// Scatter category
category = new DefaultMutableTreeNode("Scatter Charts");
top.add(category);
defaultMutableTreeNode = new DefaultMutableTreeNode(new ChartInfo("ScatterChart01 - Gaussian Blob", new ScatterChart01().getChart()));
category.add(defaultMutableTreeNode);
defaultMutableTreeNode = new DefaultMutableTreeNode(new ChartInfo("ScatterChart02 - Logarithmic Data", new ScatterChart02().getChart()));
category.add(defaultMutableTreeNode);