super("Custom Icon Example");
setSize(350, 450);
setDefaultCloseOperation(EXIT_ON_CLOSE);
// Build the hierarchy of containers & objects
String[] schoolyard = {"School", "Playground", "Parking Lot", "Field"};
String[] mainstreet = {"Grocery", "Shoe Shop", "Five & Dime",
"Post Office"};
String[] highway = {"Gas Station", "Convenience Store"};
String[] housing = {"Victorian_blue", "Faux Colonial",
"Victorian_white"};
String[] housing2 = {"Mission", "Ranch", "Condo"};
Hashtable homeHash = new Hashtable();
homeHash.put("Residential 1", housing);
homeHash.put("Residential 2", housing2);
Hashtable cityHash = new Hashtable();
cityHash.put("School grounds", schoolyard);
cityHash.put("Downtown", mainstreet);
cityHash.put("Highway", highway);
cityHash.put("Housing", homeHash);
Hashtable worldHash = new Hashtable();
worldHash.put("My First VRML World", cityHash);
// Build our tree out of our big hashtable
tree1 = new JTree(worldHash);
tree2 = new JTree(worldHash);
DefaultTreeCellRenderer renderer =
(DefaultTreeCellRenderer)tree2.getCellRenderer();
renderer.setClosedIcon(new ImageIcon("door.closed.gif"));
renderer.setOpenIcon(new ImageIcon("door.open.gif"));
renderer.setLeafIcon(new ImageIcon("world.gif"));
JSplitPane pane = new JSplitPane(JSplitPane.VERTICAL_SPLIT,
tree1, tree2);
getContentPane().add(pane, BorderLayout.CENTER);
