DefaultTreeCellRenderer & LookAndFeel UI

Question

Hi All,
I need HELP!!!
I've found small bug in DefaultTreeCellRenderer Class and Look&Feel UserInterface.
After use DefaultTreeCellRenderer for JTree, SwingUtilities.updateComponentTreeUI() method can't change UI for initialised JTrees. For new created Trees all work properly.
The next small Application show this:
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.UIManager.*;
import java.awt.*;
import java.awt.event.*;
public class TreeRendererBug extends javax.swing.JFrame {
    static private boolean DEBUG = true;
    static private LookAndFeelInfo style[];
    private javax.swing.JMenu myMenuStyle = new javax.swing.JMenu();
    private ButtonGroup groupStyleMenu = new ButtonGroup();
    private javax.swing.JMenuBar jMenuBar1 = new javax.swing.JMenuBar();
    private javax.swing.JMenu jMenu1;
    private javax.swing.JPanel jPanel1 = new javax.swing.JPanel();
    private javax.swing.JScrollPane jScrollPane1 = new javax.swing.JScrollPane();
    private javax.swing.JTree jTree1 = new javax.swing.JTree();
    public TreeRendererBug() {
        try {
            LookAndFeel curStyle=  UIManager.getLookAndFeel();
            style = javax.swing.UIManager.getInstalledLookAndFeels();
            if(style != null) {
                RadioMenuListener myRadioMenuListener = new RadioMenuListener();
                for(int ii=0; ii< style.length ;ii++) {
                    if(DEBUG) System.out.println(style[ii].getClassName());
                    JRadioButtonMenuItem jRadioMenuItem = new javax.swing.JRadioButtonMenuItem(style[ii].getName(),style[ii].getName()==curStyle.getName());
                    jRadioMenuItem.setActionCommand(style[ii].getClassName());
                    jRadioMenuItem.addActionListener(myRadioMenuListener);
                    groupStyleMenu.add(jRadioMenuItem);
                    myMenuStyle.add(jRadioMenuItem);
        } catch (Exception e) {
            System.out.println("ERROR: "+e.toString());
        jMenu1 = myMenuStyle;
        jMenu1.setText("UI Style");
        jMenuBar1.add(jMenu1);
        jPanel1.setLayout(new javax.swing.BoxLayout(jPanel1, 0));
        jScrollPane1.setViewportView(jTree1);
        jPanel1.add(jScrollPane1);
        getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER);
        setJMenuBar(jMenuBar1);
        // !!!!!!  Bug in DefaultTreeCellRenderer !!!!!!!!
        // after comment this row, L&F will be set UI style to the all JTree elements
        jTree1.setCellRenderer(new DefaultTreeCellRenderer());
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                System.exit (0); }
        pack ();
    public static void main (String args[]) {
        new TreeRendererBug ().show ();
    class RadioMenuListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(DEBUG) System.out.println("Command "+ e.getActionCommand() );
            try {
                UIManager.setLookAndFeel(e.getActionCommand());
                SwingUtilities.updateComponentTreeUI(TreeRendererBug.this);
                TreeRendererBug.this.validate();
            } catch (Exception exc) {
                System.out.println("ERROR: "+exc.toString());
How change UI for initialised JTree with DefaultTreeCellRenderer ?
Thank you in advance,
AT.

Answer 1

Hi All,
I need HELP!!!
I've help my self ! :))))
after change style is it is necessary set new CellRenderer for JTree:
    class RadioMenuListener implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if(DEBUG) System.out.println("Command "+ e.getActionCommand() );
            try {
                UIManager.setLookAndFeel(e.getActionCommand());
                SwingUtilities.updateComponentTreeUI(TreeRendererBug.this);
                jTree1.setCellRenderer(new DefaultTreeCellRenderer());
                TreeRendererBug.this.validate();
            } catch (Exception exc) {
                System.out.println("ERROR: "+exc.toString());
[//code]