Collapsing nodes in JTree

Hi,
I would like to know how can I collapse all nodes of a JTree, or from a given node down. I've tried with collapseRow(int row) but it didn't work out.
Thanks

you could use the following, provided the nodes in the tree model are DefaultMutableTreeNode instances:
JTree tree;
DefaultMutableTreeNode node;
tree.collapsePath(new TreePath(node.getPath()));
best regards

Similar Messages

Add node to JTree

I have an already populated JTree. At Runtime I add one or more node to JTree, using something like
parentNode.add(newNode)....
If I call a repaint method, the new node isn't visible, I have to reload model using
DefaultTreeModel dtm = ((DefaultTreeModel)myTree.getModel());
TreeNode rootNode = (TreeNode) dtm.getRoot();
dtm.reload(rootNode);
Unfortunately this method cause the lost of focus on the currently selected node and the collapse of all JTree around its root node; If I change an existing node (for example changing its text or icon) I must reload the model too!!!
Does exist an other more "soft" method to change the aspect of a JTree without reload the entire model?

You must use or implement the
    public void valueForPathChanged(javax.swing.tree.TreePath path,java.lang.Object newNode) {
        Object[]    p = path.getPath();
        Object[]    pp = p;
        //insert node here
        int[] ci = new int[] {index};
        Object[] cc = new Object[] {node};
        fireTreeNodesChanged(this, pp, ci, cc);
        fireTreeStructureChanged(this, pp, ci, cc);
    }from the TreeModel. To fire the last two is essensial.
I implemented a GP in JAVA so i had the same problem wehn i started.

Help needed with finding node in JTree

Hi,
In my application i will be entering some string data in a text box for search criteria.
When I click on search, I will get data from database which will be shown as a JTree.
This Jtree will have some nodes in which, node with string entered in the search text box exists.
I need to focus on this node and I have only a string to find this node.
How can I do this?How can I find a node in JTree using string value?
Is there any alternate option by which I can achive my need?
Please suggest.
Thanks.

@OP: please assign your dukes.
@Andre_Uhres: if you don't get rewarded in the next couple of days, please let me know here to get at least one duke for your effort.
Bye.

Problem inserting new node into JTree with depthFirstEnumeration()

Hello,
I'm currently trying to use depthFirstEnumeration() to add and delete nodes for a simple JTree. I've written a method to handle this, but it keeps coming back with an exception saying that 'new child is an ancestor'.
All I'm trying to do is add and delete nodes from a JTree using add and remove buttons within a swing program. When a user adds the new node the JTree needs to be updated with new labels in sequential order dependent upon a depthFirst traversal of the JTree.
My current code for the add button is as follows,
public void actionPerformed(ActionEvent event)
        DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
        Enumeration e = rootNode.depthFirstEnumeration();
        if(event.getSource().equals(addButton))
            if (selectedNode != null)
                while (e.hasMoreElements()) {
                // add the new node as a child of a selected node at the end
                DefaultMutableTreeNode newNode = (DefaultMutableTreeNode)e.nextElement();
                 // treeModel.insertNodeInto(newNode, selectedNode, selectedNode.getChildCount());
                //System.out.print(newNode.getUserObject() + "" + newNodeSuffix++);
                String label = "Node"+i;
                treeModel.insertNodeInto(newNode, selectedNode, selectedNode.getChildCount());
                i++;
                  //make the node visible by scrolling to it
                TreeNode[] totalNodes = treeModel.getPathToRoot(newNode);
                TreePath path = new TreePath(totalNodes);
                tree.scrollPathToVisible(path);
                //System.out.println();
        else if(event.getSource().equals(deleteButton))
            //remove the selected node, except the parent node
            removeSelectedNode();
    } As you can see in the above code, I've tested the incrementing of the new nodes in a System.out.print() statement and they appear to be incrementing correctly. I just can't see how to correctly output the labels for the nodes.
Any help and advice always appreciated.

This is about the 5th posting on the same question. Here is the link to the last posting so you can see what has already been suggested so you don't waste your time making the same suggestion.
http://forum.java.sun.com/thread.jspa?threadID=704980
The OP doesn't seem to understand that nodes don't just rename themselves and that renderers will only display the text of the current node. If you want the text displayed to changed, then you need to change the text associated with each node, which means iterating through the entire tree to update each node with new text. Then again, maybe I don't understand the question, but the OP keeps posting the same question without any additional information.

Drag and Drop nodes in JTree

Is there a way to drap and drop JTree nodes without resorting to hacks? http://www.javaworld.com/javatips/jw-javatip97.html outlines a hack to get drag and drop working but it is kinda old. I am wondering whether there is a now a way to do this in Swing. http://weblogs.java.net/blog/shan_man/archive/2006/01/first_class_dra.html outlines a seemingly promising way but when I tried it it still wouldn't let me drag JTree nodes. (btw, if you are going to try it, you must replace TransferHandler.TransferInfo with TransferHandler.TransferSupport. It has apprently been renamed.)

I have implemented drag and drop of nodes in JTree they same way it is explained in JavaWorld link that you mentioned, I customized it for my application and it worked great.

Wordwrap nodes in jtree

Anyone know how we can do wordwrap of nodes in jtree?
Please help...
Thanks.

Any example on this? what html code should I use? The simplest possible, eg
yourNode.setText("<html>" + yourNodeText + "</html>");Most JComponents can render this html string and produce a good result. But if you wanna get a little more complex and use styles and other web things, then do as said, (two posts above) and use a JEditorPane specifically for cell renderer
ICE

Let Auto-Map in Transform work with COLLAPSED nodes/tags ?

When I open for a "Transform" activity the mapping editor and drag one complextype from one side to another on the other side then Auto-Mapping only works if the node/tag trees on both elements/sides are full expanded.
If they are collapsed then auto-map does (currently) not work.
Is there a way (option) to tell JDeveloper to look INSIDE collapsed nodes/trees and to auto-map the elements anyway?
Peter

Hi,
Have you checked if the "outside" ACL is getting hitcounts?
Could also be usefull to check the logs through ASDM monitoring and see what happens when you attempt the connection.
The NAT configurations seem correct to me.
Have you tried to test the connections by briefly allowing all traffic from outside? (Since the only place people could connect to is the forwarded ports.) Have you tried to add the current DHCP IP of "outside" to the ACL and see if it makes any difference?
If no configuration change makes a difference I would suggest using the ASDM monitoring to take logs of what happens.
You could also use the "packet-tracer" command
Format is
packet-tracer input outside tcp
And copy/paste the output here.
- Jouni

How to set the default tree node in JTree?

I want to set a default tree node in JTree when start the program,
what is the method or the function to call?
Thanks~

If you by "default" mean "selected", then you can use one of the setSelectionXXX methods in the JTree API.
If you by "default" mean something else, never mind this post :-)

Setting custom color for selected node in JTree?

Hi,
i want to set my own color for selected node in JTree. i don't want to set for all the nodes...how to set Color for Selected node using TreeCellRender class?
Thanks
Mani

I assume you are not setting a custom tree cell renderer...
javax.swing.JTree theTree = ...;
java.awt.Color newBGColor = ...;
((javax.swing.tree.DefaultTreeCellRenderer)theTree.getCellRenderer())
.setBackgroundSelectionColor(newColor);

Add a node to JTree== view change without collapse

I added a new node in a NodeTree structure.
And I want to view changes in JTree, without collapse.
What can I do?

You need to add the clustered resource into vmm, and not the individual file servers. Its the clustered resource that moves between nodes of the cluster.

Remove white space nodes from jtree

I am trying to create jtree using XML DOM.
But I m not able to remove/ignore the white space elements from DOM.
I am getting output something like this
for example
Server
Text
node1
Text
I want something like this.
Server
node1
I tried all option for removeing the white space
Here I am posting the source
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import java.io.File;
import java.io.IOException;
import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
// Basic GUI components
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
// GUI components for right-hand side
import javax.swing.JSplitPane;
import javax.swing.JEditorPane;
// GUI support classes
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.WindowEvent;
import java.awt.event.WindowAdapter;
// For creating borders
import javax.swing.border.EmptyBorder;
import javax.swing.border.BevelBorder;
import javax.swing.border.CompoundBorder;
// For creating a TreeModel
import javax.swing.tree.*;
import javax.swing.event.*;
import java.util.*;
public class DomEcho02 extends JPanel
// Global value so it can be ref'd by the tree-adapter
static Document document;
static final int windowHeight = 460;
static final int leftWidth = 300;
static final int rightWidth = 340;
static final int windowWidth = leftWidth + rightWidth;
public DomEcho02()
// Make a nice border
EmptyBorder eb = new EmptyBorder(5,5,5,5);
BevelBorder bb = new BevelBorder(BevelBorder.LOWERED);
CompoundBorder cb = new CompoundBorder(eb,bb);
this.setBorder(new CompoundBorder(cb,eb));
// Set up the tree
JTree tree = new JTree(new DomToTreeModelAdapter());
// Iterate over the tree and make nodes visible
// (Otherwise, the tree shows up fully collapsed)
//TreePath nodePath = ???;
// tree.expandPath(nodePath);
// Build left-side view
JScrollPane treeView = new JScrollPane(tree);
treeView.setPreferredSize(
new Dimension( leftWidth, windowHeight ));
// Build right-side view
JEditorPane htmlPane = new JEditorPane("text/html","");
htmlPane.setEditable(false);
JScrollPane htmlView = new JScrollPane(htmlPane);
htmlView.setPreferredSize(
new Dimension( rightWidth, windowHeight ));
// Build split-pane view
JSplitPane splitPane =
new JSplitPane( JSplitPane.HORIZONTAL_SPLIT,
treeView,
htmlView );
splitPane.setContinuousLayout( true );
splitPane.setDividerLocation( leftWidth );
splitPane.setPreferredSize(
new Dimension( windowWidth + 10, windowHeight+10 ));
// Add GUI components
this.setLayout(new BorderLayout());
this.add("Center", splitPane );
} // constructor
public static void main(String argv[])
if (argv.length != 1) {
System.err.println("Usage: java DomEcho filename");
System.exit(1);
DocumentBuilderFactory factory =
DocumentBuilderFactory.newInstance();
//factory.setValidating(true);
//factory.setNamespaceAware(true);
try {
DocumentBuilder builder = factory.newDocumentBuilder();
document = builder.parse( new File(argv[0]) );
makeFrame();
} catch (SAXException sxe) {
// Error generated during parsing)
Exception x = sxe;
if (sxe.getException() != null)
x = sxe.getException();
x.printStackTrace();
} catch (ParserConfigurationException pce) {
// Parser with specified options can't be built
pce.printStackTrace();
} catch (IOException ioe) {
// I/O error
ioe.printStackTrace();
} // main
public static void makeFrame() {
// Set up a GUI framework
JFrame frame = new JFrame("DOM Echo");
frame.addWindowListener(
new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
// Set up the tree, the views, and display it all
final DomEcho02 echoPanel =
new DomEcho02();
frame.getContentPane().add("Center", echoPanel );
frame.pack();
Dimension screenSize =
Toolkit.getDefaultToolkit().getScreenSize();
int w = windowWidth + 10;
int h = windowHeight + 10;
frame.setLocation(screenSize.width/3 - w/2,
screenSize.height/2 - h/2);
frame.setSize(w, h);
frame.setVisible(true);
} // makeFrame
// An array of names for DOM node-types
// (Array indexes = nodeType() values.)
static final String[] typeName = {
"none",
"Element",
"Attr",
"Text",
"CDATA",
"EntityRef",
"Entity",
"ProcInstr",
"Comment",
"Document",
"DocType",
"DocFragment",
"Notation",
// This class wraps a DOM node and returns the text we want to
// display in the tree. It also returns children, index values,
// and child counts.
public class AdapterNode
org.w3c.dom.Node domNode;
// Construct an Adapter node from a DOM node
public AdapterNode(org.w3c.dom.Node node) {
domNode = node;
// Return a string that identifies this node in the tree
// *** Refer to table at top of org.w3c.dom.Node ***
public String toString() {
String s = typeName[domNode.getNodeType()];
String nodeName = domNode.getNodeName();
if (! nodeName.startsWith("#")) {
s += ": " + nodeName;
if (domNode.getNodeValue() != null) {
if (s.startsWith("ProcInstr"))
s += ", ";
else
s += ": ";
// Trim the value to get rid of NL's at the front
String t = domNode.getNodeValue().trim();
int x = t.indexOf("\n");
if (x >= 0) t = t.substring(0, x);
s += t;
return s;
* Return children, index, and count values
public int index(AdapterNode child) {
//System.err.println("Looking for index of " + child);
int count = childCount();
for (int i=0; i<count; i++) {
AdapterNode n = this.child(i);
if (child.domNode == n.domNode) return i;
return -1; // Should never get here.
public AdapterNode child(int searchIndex) {
//Note: JTree index is zero-based.
org.w3c.dom.Node node =
domNode.getChildNodes().item(searchIndex);
return new AdapterNode(node);
public int childCount() {
return domNode.getChildNodes().getLength();
// This adapter converts the current Document (a DOM) into
// a JTree model.
public class DomToTreeModelAdapter
implements javax.swing.tree.TreeModel
// Basic TreeModel operations
public Object getRoot() {
//System.err.println("Returning root: " +document);
return new AdapterNode(document);
public boolean isLeaf(Object aNode) {
// Determines whether the icon shows up to the left.
// Return true for any node with no children
AdapterNode node = (AdapterNode) aNode;
if (node.childCount() > 0) return false;
return true;
public int getChildCount(Object parent) {
AdapterNode node = (AdapterNode) parent;
return node.childCount();
public Object getChild(Object parent, int index) {
AdapterNode node = (AdapterNode) parent;
return node.child(index);
public int getIndexOfChild(Object parent, Object child) {
AdapterNode node = (AdapterNode) parent;
return node.index((AdapterNode) child);
public void valueForPathChanged(TreePath path, Object newValue) {
// Null. We won't be making changes in the GUI
// If we did, we would ensure the new value was really new,
// adjust the model, and then fire a TreeNodesChanged event.
* Use these methods to add and remove event listeners.
* (Needed to satisfy TreeModel interface, but not used.)
private Vector listenerList = new Vector();
public void addTreeModelListener(TreeModelListener listener) {
if ( listener != null
&& ! listenerList.contains( listener ) ) {
listenerList.addElement( listener );
public void removeTreeModelListener(TreeModelListener listener) {
if ( listener != null ) {
listenerList.removeElement( listener );
// Note: Since XML works with 1.1, this example uses Vector.
// If coding for 1.2 or later, though, I'd use this instead:
// private List listenerList = new LinkedList();
// The operations on the List are then add(), remove() and
// iteration, via:
// Iterator it = listenerList.iterator();
// while ( it.hasNext() ) {
// TreeModelListener listener = (TreeModelListener) it.next();
* Invoke these methods to inform listeners of changes.
* (Not needed for this example.)
* Methods taken from TreeModelSupport class described at
* http://java.sun.com/products/jfc/tsc/articles/jtree/index.html
* That architecture (produced by Tom Santos and Steve Wilson)
* is more elegant. I just hacked 'em in here so they are
* immediately at hand.
public void fireTreeNodesChanged( TreeModelEvent e ) {
Enumeration listeners = listenerList.elements();
while ( listeners.hasMoreElements() ) {
TreeModelListener listener =
(TreeModelListener) listeners.nextElement();
listener.treeNodesChanged( e );
public void fireTreeNodesInserted( TreeModelEvent e ) {
Enumeration listeners = listenerList.elements();
while ( listeners.hasMoreElements() ) {
TreeModelListener listener =
(TreeModelListener) listeners.nextElement();
listener.treeNodesInserted( e );
public void fireTreeNodesRemoved( TreeModelEvent e ) {
Enumeration listeners = listenerList.elements();
while ( listeners.hasMoreElements() ) {
TreeModelListener listener =
(TreeModelListener) listeners.nextElement();
listener.treeNodesRemoved( e );
public void fireTreeStructureChanged( TreeModelEvent e ) {
Enumeration listeners = listenerList.elements();
while ( listeners.hasMoreElements() ) {
TreeModelListener listener =
(TreeModelListener) listeners.nextElement();
listener.treeStructureChanged( e );
}

DocumentBuilderFactory can be configured to ignore white space.
http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/parsers/DocumentBuilderFactory.html#setIgnoringElementContentWhitespace(boolean)

Making a node in JTree non expandable

How do I make a node in a JTree non expandable. The nodes in the tree are DefaultMutableTreeNode. I have a tree with root R. It has children ch1, ch2, ch3. Nodes ch1 etc also have X number of children. What I want is if I click (either double click on the node or single clicking on the '+') on either of the child nodes ch1, ch2 and ch3 to disable expansion i.e. stop the tree collapsing beyond those nodes. I have tried tree.setExpandsSelectedPaths(false) and others but it still doesnt work. Any help much appreciated. Thanx.

Thanx Jeanette, that is exactly!! what I'm looking for. Much appreciated.

How do I remove expand / collapse icon for JTree empty folders

Hi
I am using a JTree as a file system browser. I use DefaultMutableTreeNode nodes.
I have a problem with empty folders.
Empty folders show the expand / collapse icon, leading the user to believe there are sub-directories. When the user double-clicks the folder, the expand / collapse icon goes away. This is a "haha-gotcha" glitch that I really don't want my users to have to continually deal with.
So, how might I get my JTree to not show the expand / collapse icon for empty folders?
Thanks
Wayne

Maybe I can use the FileSystemView isTraversable(File f) method in my TreeCellRenderer class to check if anything is in the directory.
But I still need to know how to disable the expand / collapse icon for such a node.

Setting the color of a particular node in JTree

Hi all!
I'm new to Java and facing a problem with JTrees.
I'm using the following snippet to create a JTree :
DeafultMutableTreeNode root = new DefaultMutableTeeNode("Letters");
DeafultMutableTreeNode parent1 = new DefaultMutableTeeNode("uppercase");
DeafultMutableTreeNode parent2 = new DefaultMutableTeeNode("lowercase");
DeafultMutableTreeNode child1 = new DefaultMutableTeeNode("A");
DeafultMutableTreeNode child2 = new DefaultMutableTeeNode("B");
DeafultMutableTreeNode child3 = new DefaultMutableTeeNode("C");
DeafultMutableTreeNode child4 = new DefaultMutableTeeNode("a");
DeafultMutableTreeNode child5 = new DefaultMutableTeeNode("b");
DeafultMutableTreeNode child6 = new DefaultMutableTeeNode("c");
root.add(parent1);
root.add(parent2);
parent1.add(child1);
parent1.add(child2);
parent1.add(child3);
parent2.add(child4);
parent2.add(child5);
parent2.add(child6);
JTree tree = new JTree(root);
JScrollPane pane = new JScrollPane(tree);
TreePath path = tree.getNextMatch("lowercase", 0, javax.swing.text.Position.Bias.Forward);
tree.setSelectionPath(path);
tree.expandPath(path);
In the above JTree, the node labeled "lowercase" gets selected and expanded as soon as the program is run.
What i want to know is that, is there any way in which i can set only the "lowercase" node's background to a different color (say, YELLOW) and have it so, no matter if the node is expanded or collapsed or other nodes are expanded or collapsed.
ps: Sample snippet would really b helpful.

You need to write your own renderer for this.
Read the tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html#display

Setting the color of a node in JTree

Hi all!
I'm new to Java and facing a problem with JTrees.
I'm using the following snippet to create a JTree :
DeafultMutableTreeNode root = new DefaultMutableTeeNode("Letters");
DeafultMutableTreeNode parent1 = new DefaultMutableTeeNode("uppercase");
DeafultMutableTreeNode parent2 = new DefaultMutableTeeNode("lowercase");
DeafultMutableTreeNode child1 = new DefaultMutableTeeNode("A");
DeafultMutableTreeNode child2 = new DefaultMutableTeeNode("B");
DeafultMutableTreeNode child3 = new DefaultMutableTeeNode("C");
DeafultMutableTreeNode child4 = new DefaultMutableTeeNode("a");
DeafultMutableTreeNode child5 = new DefaultMutableTeeNode("b");
DeafultMutableTreeNode child6 = new DefaultMutableTeeNode("c");
root.add(parent1);
root.add(parent2);
parent1.add(child1);
parent1.add(child2);
parent1.add(child3);
parent2.add(child4);
parent2.add(child5);
parent2.add(child6);
JTree tree = new JTree(root);
JScrollPane pane = new JScrollPane(tree);
TreePath path = tree.getNextMatch("lowercase", 0, javax.swing.text.Position.Bias.Forward);
tree.setSelectionPath(path);
tree.expandPath(path);
In the above JTree, the node labeled "lowercase" gets selected and expanded as soon as the program is run.
What i want to know is that, is there any way in which i can set only the "lowercase" node's background to a different color (say, YELLOW) and have it so, no matter if the node is expanded or collapsed or other nodes are expanded or collapsed.
ps: Sample snippet would really b helpful.

You need to write your own renderer for this.
Read the tutorial:
http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html#display

Collapsing nodes in JTree

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