category.add(defaultMutableTreeNode);
defaultMutableTreeNode = new DefaultMutableTreeNode(new ChartInfo("BarChart02 - Date Categories", new BarChart02().getChart()));
category.add(defaultMutableTreeNode);
defaultMutableTreeNode = new DefaultMutableTreeNode(new ChartInfo("BarChart03 - Positive and Negative", new BarChart03().getChart()));
category.add(defaultMutableTreeNode);
defaultMutableTreeNode = new DefaultMutableTreeNode(new ChartInfo("BarChart04 - Missing Point in Series", new BarChart04().getChart()));
category.add(defaultMutableTreeNode);