Custom TreeCellRenderer not working in Program

Question

The following 2 lines set my TreeCellRenderer
FSDirectoryCellRenderer renderer1 = new FSDirectoryCellRenderer();
jtree.setCellRenderer(renderer1);
Rendering is not working in the Below Program. But If I comment the above 2 lines the default rendering is working. There is a probelm with my rendering class FSDirectoryCellRenderer which I am not able to figure out. PLease help me out
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.UIManager;
import javax.swing.border.BevelBorder;
import javax.swing.border.SoftBevelBorder;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeCellRenderer;
import javax.swing.tree.TreePath;
public class UniversityLayout extends JFrame {
     private JTree jtree = null;
     private DefaultTreeModel defaultTreeModel = null;
     private JTextField jtfStatus;
     public UniversityLayout() {
          super("A University JTree Example");
          setSize(300, 300);
          Object[] nodes = buildJTree();
          DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
          renderer.setOpenIcon(new ImageIcon("opened.gif"));
          renderer.setClosedIcon(new ImageIcon("closed.gif"));
          renderer.setLeafIcon(new ImageIcon("leaf.gif"));
          jtree.setCellRenderer(renderer);
          jtree.setShowsRootHandles(true);
          jtree.setEditable(false);
          jtree.addTreeSelectionListener(new UTreeSelectionListener());
          FSDirectoryCellRenderer renderer1 = new FSDirectoryCellRenderer();
          jtree.setCellRenderer(renderer1);
          JScrollPane s = new JScrollPane();
          s.getViewport().add(jtree);
          getContentPane().add(s, BorderLayout.CENTER);
          jtfStatus = new JTextField(); // Use JTextField to allow copy operation
          jtfStatus.setEditable(false);
          jtfStatus.setBorder(new SoftBevelBorder(BevelBorder.LOWERED));
          getContentPane().add(jtfStatus, BorderLayout.SOUTH);
          TreePath path = new TreePath(nodes);
          jtree.setSelectionPath(path);
//          jtree.scrollPathToVisible(path);
     class FSDirectoryCellRenderer extends JLabel implements TreeCellRenderer {
          private Color textSelectionColor;
          private Color textNoSelectionColor;
          private Color backgroundSelectionColor;
          private Color backgroundNoSelectionColor;
          private boolean sel;
          public FSDirectoryCellRenderer() {
               super();
               textSelectionColor = UIManager.getColor("Tree.selectionForeground");
               textNoSelectionColor = UIManager.getColor("Tree.textForeground");
               backgroundSelectionColor = UIManager
                         .getColor("Tree.selectionBackground");
               backgroundNoSelectionColor = UIManager
                         .getColor("Tree.textBackground");
               setOpaque(false);
          public Component getTreeCellRendererComponent(JTree tree, Object value,
                    boolean selected, boolean expanded, boolean leaf, int row,
                    boolean hasFocus) {
               DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
               Object obj = node.getUserObject();
               setText(obj.toString());
               if (obj instanceof Boolean) {
                    setText("Loading");
               if (obj instanceof NodeIconData) {
                    NodeIconData nodeIconData = (NodeIconData) obj;
                    if (expanded) {
                         setIcon(nodeIconData.getExpandedIcon());
                    } else {
                         setIcon(nodeIconData.getNormalIcon());
               } else {
                    setIcon(null);
               setFont(jtree.getFont());
               setForeground(selected ? textSelectionColor : textNoSelectionColor);
               setBackground(selected ? backgroundSelectionColor
                         : backgroundNoSelectionColor);
               sel = selected;
               return this;
     private Object[] buildJTree() {
          Object[] nodes = new Object[4];
          DefaultMutableTreeNode root = new DefaultMutableTreeNode(new College(1, "College"));
          DefaultMutableTreeNode parent = root;
          nodes[0] = root;
          DefaultMutableTreeNode node = new DefaultMutableTreeNode(new College(2, "Class 1"));
          parent.add(node);
          parent = node;
          parent.add(new DefaultMutableTreeNode(new College(3, "Section A")));
          parent.add(new DefaultMutableTreeNode(new College(4, "Section B")));
          parent = root;
          node = new DefaultMutableTreeNode(new College(5, "Class 2"));
          parent.add(node);
          nodes[1] = node;
          parent = node;
          node = new DefaultMutableTreeNode(new College(6, "Science"));
          parent.add(node);
//          nodes[2] = node;
          parent = node;
          parent.add(new DefaultMutableTreeNode(new College(7, "Computer Science")));
          parent.add(new DefaultMutableTreeNode(new College(8, "Information Science")));
          parent = (DefaultMutableTreeNode)nodes[1];
          node = new DefaultMutableTreeNode(new College(9, "Arts"));
          parent.add(node);
          nodes[2] = node;
          parent = (DefaultMutableTreeNode)nodes[2];
          parent.add(new DefaultMutableTreeNode(new College(10, "Drawing")));
          node = new DefaultMutableTreeNode(new College(11, "Painting"));
          parent.add(node);
          nodes[3] = node;
          parent = (DefaultMutableTreeNode)nodes[1];
          parent.add(new DefaultMutableTreeNode(new College(12, "Telecom")));
          defaultTreeModel = new DefaultTreeModel(root);
          jtree = new JTree(defaultTreeModel);
          return nodes;
     public static void main(String argv[]) {
          UniversityLayout frame = new UniversityLayout();
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.setVisible(true);
     class UTreeSelectionListener implements TreeSelectionListener {
          public void valueChanged(TreeSelectionEvent e) {
               TreePath path = e.getPath();
               Object[] nodes = path.getPath();
               String status = "";
               for (int k = 0; k < nodes.length; k++) {
                    DefaultMutableTreeNode node = (DefaultMutableTreeNode) nodes[k];
                    College nd = (College) node.getUserObject();
                    status += "." + nd.getId();
               jtfStatus.setText(status);
class College {
     protected int id;
     protected String name;
     public College(int id, String name) {
          this.id = id;
          this.name = name;
     public int getId() {
          return id;
     public String getName() {
          return name;
     public String toString() {
          return name;
}

Answer 1

It works fine for me (after commenting out the part about NodeIconData, whose source you didn't provide). What is the behavior you expect to see but don't? Is it that when you click on a tree node, it doesn't appear "selected?"
Why not extends DefaultTreeCellRenderer? You appear to be doing minimal configuring (sometimes changing the text and/or icon of the node).
     class FSDirectoryCellRenderer extends DefaultTreeCellRenderer {
          public FSDirectoryCellRenderer() {
               super();
               setOpaque(false);
          public Component getTreeCellRendererComponent(JTree tree, Object value,
                    boolean selected, boolean expanded, boolean leaf, int row,
                    boolean hasFocus) {
               super.getTreeCellRendererComponent(tree, value, selected, expanded,
                                   leaf, row, hasFocus);
               DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
               Object obj = node.getUserObject();
               setText(obj.toString());
               if (obj instanceof Boolean) {
                    setText("Loading");
//               if (obj instanceof NodeIconData) {
//                    NodeIconData nodeIconData = (NodeIconData) obj;
//                    if (expanded) {
//                         setIcon(nodeIconData.getExpandedIcon());
//                    } else {
//                         setIcon(nodeIconData.getNormalIcon());
//               } else {
                    setIcon(null);
               return this;
     }