How to highlight a node in a JTree???

I am trying to highlight (actually set the Font to Bold) one node of a JTree when an TreeSelectionEvent occurs (valueChanged method). The node to be highlighted can be different than the one selected.
Thanks for your help.
JavaSan

To control the appearance of tree nodes, you need to write a TreeCellRenderer. Check Sun's tutorial on how to use trees (there's a link to it in the API documentation for JTree). The signature of the method you need to implement is this:
public Component getTreeCellRendererComponent(
JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus)so as you can see, you can vary the appearance of the node based on any of the parameters of that method.

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How to highlight Tree node with a diff color

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It's an item on page 4 of the application that the blog example is taken from. The tree query:
SELECT EMPLOYEE_ID AS ID
     , MANAGER_ID AS PID
     , CASE
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     , NULL        AS A2
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See the sections Managing Session State Values and Using f?p Syntax to Link Pages in the documentation to understand how to set session state values using URLs.
http://download.oracle.com/docs/cd/E14373_01/appdev.32/e11838/concept.htm

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I have a JTree and each node on the JTree has a string name. I also have a JEditorPane that lists all these names at start up. If the user clicks on one of these names, I want to catch the HyperlinkEvent and automatically select that node in the JTree.
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i used setSelectionPath() . But it is highlighting the node's icon only(i.e by changing the color to lavender). I'm getting higlighted the node with setSelectionInterval(ind,ind) only. I want that higlighlighting to be with setselectionPath() . How to do?
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When I do a setSelectionPath the node-text is highlighted, not the icon. Anyways, do a custom treecellrenderer like this:
public Component getTreeCellRendererComponent(.......) {
if(selected == true) setBackground(somecolor)
else setBackground (defaultcolor)
if that describtion isnt sufficient try search the forum.

How to use custom nodes in a JTree without reinventing the wheel?

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Each node contains two JTextAreas in a Box layout and a few JButtons.
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was able to fix it over here:
http://forum.java.sun.com/thread.jspa?messageID=4089777

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As a newbie to Java, I developed an application which started out by by having a user select a value in a JList and associated information was formatted nicely into a JTextPane (really it is just making some bold/italic/regular font switches).
I now think it may be more visually appealing to represent the whole thing as a JTree, and the user would just click the +/- to access the associated information.
So I would like substitute the JTree for the JList, while keep my nicely formatted JTextPane and am a bit stuck. I'd like each item in the JList to be a node and the information is going to be a leaf.
Searching through the forums and other tutorials it I think I need to create a TreeCellRenderer that uses my JTextPane.
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Thanks in advance.

Hi codingMonkey,
I've looked at both of those (previously) but I've not got enough experience to figure out the coding bits for my application.
So lets say I wanted to hack the JTextPane example here http://java.sun.com/docs/books/tutorial/uiswing/components/editorpane.html and put a simple JTree in its place with three nodes and use the provided JTextPane as a text for the leafs.
I think the important bits (except are addStylesToDocument) are this:
private JTextPane createTextPane() {
        String[] initString =
                { "This is an editable JTextPane, ",            //regular
                  "another ",                                   //italic
                  "styled ",                                    //bold
                  "text ",                                      //small
                  "component, ",                                //large
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                  " " + newline,                                //button
                  "...and embedded icons..." + newline,         //regular
                  " ",                                          //icon
                  newline + "JTextPane is a subclass of JEditorPane that " +
                    "uses a StyledEditorKit and StyledDocument, and provides " +
                    "cover methods for interacting with those objects."
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                { "regular", "italic", "bold", "small", "large",
                  "regular", "button", "regular", "icon",
                  "regular"
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        StyledDocument doc = textPane.getStyledDocument();
        addStylesToDocument(doc);
        try {
            for (int i=0; i < initString.length; i++) {
                doc.insertString(doc.getLength(), initString,
doc.getStyle(initStyles[i]));
} catch (BadLocationException ble) {
System.err.println("Couldn't insert initial text into text pane.");
return textPane;
I don't really understand the TreeCellRenderer API link you sent and how to link the above JTextPane to the TreeCellRenderer.

How to get a node in a Jtree on which right mouse button is clicked

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I tried giving this to move a node from one parent node to other parent node.
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Object oldParent = oldParentNode.getUserObject();
Object newParent = node.getUserObject();
if(oldParent.equals(newParent)) {
model.insertNodeInto(newNode, node, 0);
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oldParentNode.remove(newNode);
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what happened next ?????

How to highlight node in JTree?

After the tree has been displayed, I want to highlight the nodes matching some certain keywords. How to implement that? Nothing useful is found in past threads.
thanks.

to take a wild guess:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
public class HighlightTreeNodeTest {
private final JTree tree       = new JTree();
private final JTextField field = new JTextField("foo");
private final JButton button   = new JButton();
private final MyTreeCellRenderer renderer =
    new MyTreeCellRenderer(tree.getCellRenderer());
public JComponent makeUI() {
    field.getDocument().addDocumentListener(new DocumentListener() {
      @Override public void insertUpdate(DocumentEvent e) {
        fireDocumentChangeEvent();
      @Override public void removeUpdate(DocumentEvent e) {
        fireDocumentChangeEvent();
      @Override public void changedUpdate(DocumentEvent e) {}
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    renderer.q = field.getText();
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    p.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
    p.add(field, BorderLayout.NORTH);
    p.add(new JScrollPane(tree));
    return p;
private void fireDocumentChangeEvent() {
    String q = field.getText();
    renderer.q = q;
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    collapseAll(tree, root);
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    tree.repaint();
private static void searchTree(JTree tree, TreePath path, String q) {
    TreeNode node = (TreeNode)path.getLastPathComponent();
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      Enumeration e = node.children();
      while (e.hasMoreElements())
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    TreeNode node = (TreeNode)parent.getLastPathComponent();
    if (!node.isLeaf() && node.getChildCount()>=0) {
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        TreeNode n = (TreeNode)e.nextElement();
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        collapseAll(tree, path);
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public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() { createAndShowGUI(); }
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    f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
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class MyTreeCellRenderer extends DefaultTreeCellRenderer {
private final TreeCellRenderer renderer;
public String q;
public MyTreeCellRenderer(TreeCellRenderer renderer) {
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@Override public Component getTreeCellRendererComponent(
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      c.setOpaque(true);
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Highlighting nodes in a JTree

Hi,
I'd like to know how I can produce the efect of highlighting nodes in a JTree when the mouse moves over the JTree.
Thanks

You say to get the mouseevent coordinates with a mouse
listener, but which component should be the caller of
the methos addMouseListener?
If I choose the jtree, I can't get the 'mouseevent
coordinates' each time the mouse moves over a node,
because the methods mouseEntered and mouseExited are
invoked just once (when the mouse enter inside the
jtree's area (mouseEntered), and when the mouse gets
out the jtree's area(mouseExited)), so I can't change
the boolean field to true for nodes which have the
mouse over.just use mouseMoved of the MouseMotionListener.
however, i have my doubts that you will have a lot of fun with the suggested method (correct though it is).
at least make sure you only call the repaint method if the mouse moved into a new node. you might want to try the the nodeChanged method, that way you don't repaint the whole tree every time.
thomas

How to highlight/indicate particular tree Node in Tree UI element

Hi All
Can anybody let us know how to highlight/indicate specific node in a tree struture.
currently i am able to display the tree struture with all the nodes & elements but it is always tasking firstnode as highlighted one or indicated one.
if i want to highlight specific node in a tree struture...what was the procedure or any sample code then it would be great help to us.
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Trisha rani

Hi Krishna
Thanks for your reply
I displayed the tree structure and i want to highlight specific parent node/child element , what was the sample code??
for example my tree was displayed in the below struture and at the runtime specific child node i wanted to be highlighted i want to make selectable particular nodeType......
Can you pls send sample codee code??
my requirement
A
A1
   A2
   A3
B
B1
   B2
   B3
   B4
   B5
now i want to make selectable or highlighted B4,B5 etc or A2,A3 at runtime.
The other guy who replied for this thread it is working for Parent nodes to make highlighted like it is working for parent nodes which is have child nodes. i am able to hightlight at runtime for Nodes A,B etc .
Now i want to highlight or make selected one for B4,A3 etc, pls provide sample code??
it would be great help to us
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Trisha Rani

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DefaultListModel workgroups;
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How many nodes does this tree have?
import java.awt.EventQueue;
import javax.swing.*;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.*;
public class BigTree {
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                    public Object getRoot() {
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How to highlight a node in a JTree???

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