Sorting the nodes of a JTree

Can anyone tell me how to go about sorting the nodes in a JTree?

The best way to do it is thru the treemodel. Either adjust the order in a DefaultTreeModel, or create your own TreeModel.

Similar Messages

How do i expand all the nodes in a jtree

Hi,
I am working on a project where i need to expand all the nodes of a jtree i have tried a few different ways but it never seems to expand all the nodes..
I would be very greatful if someone could point me in the right direction
cheers
Mary

you could use the following method that expands nodes recursively
expandNode( myTree, myRootNode, new TreePath( myRootNode ) );
public static void expandNode( JTree tree, TreeNode node, TreePath path ) {
    tree.expandPath( path );
    int i = node.getChildCount( );
    for ( int j = 0; j< i; j++ ) {
        TreeNode child = node.getChildAt( j );
        expandNode( tree, child , path.pathByAddingChild( child ) );
}

Sort the Nodes and remove duplicate nodes

Hello Experts,
I have a requirement to sort the nodes based on a key value.
e.g.
<Node>
    <Key>2<Key>
    <Value1>name1<Value1>
    <Value2>email1<Value2>
</Node>
<Node>
     <Key>1<Key>
     <Value1>name2<Value1>
    <Value2>email2<Value2>
</Node>
<Node>
     <Key>2<Key>
     <Value1>name3<Value1>
    <Value2>email3<Value2>
</Node>
and the Output should be
<TNode>
     <Key>1<Key>
     <Value1>name2<Value1>
    <Value2>email2<Value2>
</TNode>
<TNode>
     <Key>2<Key>
     <Value1>name3<Value1>
    <Value2>email3<Value2>
</TNode>
I tried using SortByKey function for Node i.e.
Key --> SortByKey , Node --> TNode
But I dont get sorted value for Value1 and Value2.
Can anybody give solution for this?
I have around 25000 records as input and there are around 25 values in structure.
Please help.
Thanks in advance,
Beena.

Beena,
Here you go. If it doesn't helps then let me know.
Mapping.
http://www.flickr.com/photo_zoom.gne?id=2185600055&size=o
http://www.flickr.com/photo_zoom.gne?id=2185600049&size=o
http://www.flickr.com/photo_zoom.gne?id=2185600063&size=o
http://www.flickr.com/photo_zoom.gne?id=2185600067&size=o
Results
http://www.flickr.com/photo_zoom.gne?id=2185600075&size=o

Sorting the nodes...

hi group,
the tree has root.The top root has multiple nodes in it..say suppose..nearly 100 nodes in it..
for ex:
abc
def
ghi
jkl
mno
pqr
stu
vwx
xyz
i want to sort these nodes in btn action means it should sort and at the same time it should fix in the root node with sorting order.
Any body has idea on it??
shalini.

if its a DefaultMutableTreeNode, you can get the children Vector (protected variable) and sort it using the Arrays utility class. i think it has a vector or object array sorting method in which you can specify the comparator.
it might be more useful to override the add() method of your node so that when a node is added, you sort the children so the user never has to explicitly do it.

How do I control the order in which JTree displays nodes?

I'm trying to display the nodes in a JTree in a specific fashion, but I can't figure out how to change the order JTree displays them in. It seems the default is alphabetically, with leaves first and nodes with children second. I've spent a few hours pouring through the documentation, but I haven't been able to find out what I need to do. Anyone know?

They are displayed in the order they are added on the same level.

Getting TreePath for all nodes in a JTree

Hi everybody
I want to get TreePath for all the nodes in a JTree
Can anybody help me?

Hi,
i tried to used your code.
there is a problem, it is not taking the entire paths.
so if you have some children,it takes the paths only for the fathers.
so i correct it to the following way(it will take the entire paths):
public void getPathForAllNodes(TreePath path)
              Object node = path.getLastPathComponent();
              pathArrayList.add(path);
              TreeModel model = tree.getModel();
              if(model.isLeaf(node))
              return;
              int num = model.getChildCount(node);
              for(int i = 0; i < num; i++)
                   //pathArrayList.add(path);
                   getPathForAllNodes(path.pathByAddingChild(model.getChild(node, i)));
         }thanks for your code

Events of Nodes in a JTree

Okay, perhaps I am sidetracked today by all the sad craziness occuring in New York and DC, or perhaps I just don't have a grasp on JTrees yet...but...
I have implemented a TreeCellRender to create panels with buttons and other information to be the nodes of a JTree I created. Everything shows up beautifully, however, I want the buttons on this panel to depress and perfom actions (work like normal) when the user clicks/selects such a button in the tree structure. I can't figure out how to properly set up event handlers to get from the tree to the tree node to the "bean" I'm using as a node. If anyone has any helpful hints, I'd appreciate it!
Thanks in advance!

add actionlistener to the JTree, and then get the object by getLastPathComponent, and compare it if its the button and do the action.

Having multiple nodes with the same name in JTree!!!???

Hi!
I want to be able to have folders or files with the same name in different locations in my JTree. But if I do so the last one always overwrites the previous one.
I have a vector with strings like root\aaa\bbb\ccc\ddd.doc, root\aaa\bbb\eee.doc, root\aaa\ccc\fff.doc etc. In this case ccc\ddd.doc out of the first string would disapear.
In this post you can see how I add the nodes:
http://forum.java.sun.com/thread.jsp?forum=31&thread=54920
Is this because it adds everything in the same level or what? A solution/workaround would be much appreciated.
Tobias

Use this example...
public class TreeDemo {
private JFrame frame;
private JTree tree;
public TreeDemo (JTree tr) throws Exception {
frame=new JFrame();
frame.getContentPane().setLayout(new BorderLayout());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
edit=new JEditorPane();
frame.getContentPane().add frame.getContentPane().add(tr,BorderLayout.CENTER);
frame.getContentPane().add(new JButton("ok"),BorderLayout.SOUTH);
frame.pack();
frame.show();
public static void main(String[] argv)
throws Exception
Vector v=new Vector();
v.add(0,"c:\\first\\abc");
v.add(1,"c:\\first\\abc\\word1.doc");
v.add(2,"c:\\first\\abc\\description.doc");
v.add(3,"c:\\first\\def ");
v.add(4,"c:\\first\\der\\tor1.doc");
TreeDemo html = new TreeDemo (createTree(v));
private static JTree createTree(Vector v) {
JTree tree = null;
DefaultMutableTreeNode root = null;
Iterator i = v.iterator();
String subStr;
DefaultMutableTreeNode parent=null;
root = new DefaultMutableTreeNode("ROOT");
tree = new JTree(root);
parent=root;
while (i.hasNext()) {
String path = (String)i.next();
StringTokenizer st = new StringTokenizer(path,"\\");
while (st.hasMoreTokens()) {
subStr = st.nextToken();
DefaultMutableTreeNode current=findObject(parent,subStr);
if (current==null) {
DefaultMutableTreeNode node = new DefaultMutableTreeNode(subStr);
parent.add(node);
parent=node;
else {
parent=current;
parent=root;
return tree;
private static DefaultMutableTreeNode findObject(DefaultMutableTreeNode parent,String value) {
for (int i=0; i<parent.getChildCount(); i++) {
DefaultMutableTreeNode node=(DefaultMutableTreeNode)parent.getChildAt(i);
if (node.getUserObject().equals(value)) {
return node;
return null;
best regards
Stas

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

Hello,
Each node contains two JTextAreas in a Box layout and a few JButtons.
I wish to display these nodes in a JTree.
Reading the tutorial, it seems I would have to reimplement the TreeModel, TreeCellRenderer/Editor, MutableTreeNode interfaces etc.
Can I use the DefaultTreeModel, and other standard widgets (great stuff!) to minimize the amount of reimplementation I must do. aka avoid reinventing the wheel? I was thinking of extending my node from the DefaultMutableTreeNode class - however it does not display the nodes with the TextAreas, buttons etc.
any help appreciated.
thanks,
Anil

was able to fix it over here:
http://forum.java.sun.com/thread.jspa?messageID=4089777

Can the name of a specific node in a JTree be returned by MouseEvent?

I have created a mouseListener for a JTree. When a node in the JTree is clicked it should display the name of the node in a JOptionPane. Currently, I have the following:
tree.addMouseListener(new MouseAdapter()
public void mouseClicked(MouseEvent me)
     if(me.getClickCount() % 2 == 0)
     String s = "Blank";
     s = (me.getSource()).toString();
     JOptionPane.showMessageDialog(null, "Double clicked "+ s, "two", JOptionPane.PLAIN_MESSAGE);
}//mouseClicked
});//MouseListener
This gives me the class X Y value, border, maxsize, etc.... when a node is double clicked.
Does anyone know of a better way?

Don't use MouseListener.
Instead, make yourself a TreeSelectionListener as follows:
public class WhererverYourTreeIs implements TreeSelectionListener
     public void valueChanged(TreeSelectionEvent e)
         TreePath path = e.getPath();
         System.out.println(path.getLastPathComponent());
     public void initStuff()
             tree.addTreeSelectionLIstener(this);
}

How can I view the newly added node in a JTree

Hi! I have a problem with my project. I set up a JTree. At first it has a node that contains FARInfo object. When I click this node, the other program in the package will pop up a form to let user input and submit, then it will add a new node into the other node. The new node will contain FilledInfo object. But I cannot view this newly added node. The source code related with the 2 different object is as following:
tree.addTreeSelectionListener( new TreeSelectionListener()
public void valueChanged(TreeSelectionEvent e4)
DefaultMutableTreeNode node = ( DefaultMutableTreeNode )
(tree.getLastSelectedPathComponent ());
Object nodeInfo = node.getUserObject();
if (node.isLeaf())
if ( nodeInfo instanceof FARInfo )
FARInfo category = (FARInfo) nodeInfo;
displayURL ( category.categoryURL );
displayForm ( category.farFormName );
if ( DEBUG )
System.out.print ( category.categoryURL + ":\n" );
else if ( nodeInfo instanceof FilledInfo )
FilledInfo category2 = ( FilledInfo ) nodeInfo;
displayFilledForm ( category2.num );
}else
return;
My question is: how to deal with the nodes containing 2 different objects: FARInfo and FilledInfo? FilledInfo is created by the other program in the package. Thanks for your help!

I used insertNodeInto() to inser a new node into the tree, and it can be displayed. But when I used addTreeSelectionListener() to click on the newly added node, it cann not reaspond the click. Following is my original addTreeSelectionListener(). You see, if you click a node of FARInfo, then it will open a form, and after user filled in and submit it, a new node will be added into the Jtree. If you click a node of FilledInfo, then the user should view the content of this new node. But now, it seems that the sencond click cannot work. Thanks for your help.
tree.addTreeSelectionListener( new TreeSelectionListener()
public void valueChanged(TreeSelectionEvent e4)
DefaultMutableTreeNode node = ( DefaultMutableTreeNode )
(tree.getLastSelectedPathComponent ());
Object nodeInfo = node.getUserObject();
if (node.isLeaf())
if ( nodeInfo instanceof FARInfo )
FARInfo category = (FARInfo) nodeInfo;
displayURL ( category.categoryURL );
displayForm ( category.farFormName );
if ( DEBUG )
System.out.print ( category.categoryURL + ":\n" );
else if ( nodeInfo instanceof FilledInfo )
FilledInfo category2 = ( FilledInfo ) nodeInfo;
displayFilledForm ( category2.num );
}else
return;

Dynamically changing the color of nodes in a JTree

I have created a JTree and want to dynamically change the color of some of the TreeNodes as my program runs. The JTree is displayed in a JPanel. There is an algorithm built into which identifies the nodes whose color I need to change. No user actions is performed (everythign is internal to the program).
It seems that in the TreeCellRender only kicks in when the tree is first displayed. How do I get it to re-render the tree when the TreeModel changes? It seems that the Listeners are only looking for external user interactions.
Any help would be greatly appreciated.
Thanks!

I think I was a bit too vague in my question. Let me try again...
I have changed an attribute in a node in a JTree. This attribute is changed after the tree was initially rendered, but while the program is still running. I want to tell the TreeCellRenderer to look again at this node since that attribute that was changed will effect how the node should be renderered. I tried using the nodeChanged() method, but it did not work (the colot of the node did not change). Any advise how I can do this?
Thanks!

Can I move nodes in a jTree without the mouse?

I want to move nodes in a jTree as if I was dragging and dropping but I don�t want to use the mouse. Is this possible and how.

I want to move nodes in a jTree as if I was dragging
and dropping but I don�t want to use the mouse. Is
this possible and how.sure it's possible through the power of Java(tm)

How to dislay a frame when i clck on the node or leaf on the JTree

Hi All,
Iam doing project on swing. In that iam doing with JTree. The Jtree is displaying on the left side of the splitpane .My problem is if i click on the nodes or leaf in the JTree one panel should be open in on the right side of the spltpane. Iam pasting the code.please can any body knows the solution please send me.
regards
sonali
import java.awt.*;
import javax.swing.*;
import javax.swing.BorderFactory;
import javax.swing.border.*;
import java.awt.event.*;
import javax.swing.tree.*;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.event.TreeSelectionListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.tree.TreeSelectionModel;
import javax.swing.tree.DefaultTreeCellRenderer;
import java.net.URL;
import javax.swing.*;
import java.io.IOException;
import javax.swing.JEditorPane;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JFrame;
import Test.Test1;
public class JFrame1 extends javax.swing.JFrame {
JScrollPane sp;
JPanel topPanel;
JPanel leftPanel;
JPanel bottomPanel;
JPanel rightPanel;
Border b ;
JTree tree;
DefaultTreeModel treeModel;
     public JFrame1(){
          getContentPane().setLayout(null);
          setSize(405,305);
          setVisible(false);
          JPanel1.setLayout(null);
          getContentPane().add(JPanel1);
          JPanel1.setLayout(new GridLayout(1, 1));
          JPanel1.setBounds(0,0,405,305);
          JPanel1.add(JSplitPane1);
          JSplitPane1.setBounds(0,5,405,305);
          JSplitPane1.setContinuousLayout(false);
          topPanel = new JPanel();
          leftPanel = new JPanel();
          bottomPanel = new JPanel();
          topPanel.setLayout(new FlowLayout());
          leftPanel.setLayout(null);
          b = new EtchedBorder();
          leftPanel.setBorder(b);
          leftPanel.setBounds(0,0,300,305);
          bottomPanel.setLayout(new FlowLayout());
          rightPanel = new JPanel();
          rightPanel.setBounds(108, 0, 300, 305);
          JSplitPane1.setRightComponent(rightPanel);
          JSplitPane1.setLeftComponent(leftPanel);
          rightPanel.setLayout(null);
          topPanel.setBounds(0,0,305,25);
          b = new EtchedBorder(0);
          topPanel.setBorder(b);
          bottomPanel.setBounds(0,26,300,280);
          b = new BevelBorder(1, Color.black,Color.black);
          bottomPanel.setBorder(b);
          rightPanel.add(topPanel);
          rightPanel.add(bottomPanel);
          JSplitPane1.setDividerLocation(120);
          DefaultMutableTreeNode root = new DefaultMutableTreeNode("Root");
DefaultMutableTreeNode subroot = new DefaultMutableTreeNode("SubRoot");
DefaultMutableTreeNode leaf1 = new DefaultMutableTreeNode("Leaf 1");
DefaultMutableTreeNode leaf2 = new DefaultMutableTreeNode("Leaf 2");
DefaultMutableTreeNode leaf3 = new DefaultMutableTreeNode("Leaf 3");
DefaultMutableTreeNode subroot1 = new DefaultMutableTreeNode("SubRoot1");
DefaultMutableTreeNode leaf11 = new DefaultMutableTreeNode("Leaf 11");
DefaultMutableTreeNode leaf21 = new DefaultMutableTreeNode("Leaf 21");
DefaultMutableTreeNode leaf31 = new DefaultMutableTreeNode("Leaf 31 skfjdsf sfjfdsl fslfkjdsfl sflkjaflksdfdslfjds lfsdlkfjdslk sdsdlkfjdsla fflkdasjfdslkjal");
DefaultMutableTreeNode subroot2 = new DefaultMutableTreeNode("SubRoot2");
DefaultMutableTreeNode leaf12 = new DefaultMutableTreeNode("Leaf 12");
DefaultMutableTreeNode leaf22 = new DefaultMutableTreeNode("Leaf 22");
DefaultMutableTreeNode leaf32 = new DefaultMutableTreeNode("Leaf 32");
treeModel = new DefaultTreeModel(root);
tree = new JTree(treeModel);
treeModel.insertNodeInto(subroot, root, 0);
treeModel.insertNodeInto(leaf1, subroot, 0);
treeModel.insertNodeInto(leaf2, root, 1);
treeModel.insertNodeInto(leaf3, root, 2);
treeModel.insertNodeInto(subroot1, root, 3);
treeModel.insertNodeInto(leaf11, subroot1, 0);
treeModel.insertNodeInto(leaf21, subroot1, 1);
treeModel.insertNodeInto(leaf31, subroot1, 2);
treeModel.insertNodeInto(subroot2, root, 3);
treeModel.insertNodeInto(leaf12, subroot2, 0);
treeModel.insertNodeInto(leaf22, subroot2, 1);
treeModel.insertNodeInto(leaf32, subroot2, 2);
sp = new JScrollPane();
sp.setBounds(0,0,300,305);
sp.getViewport().add(tree);
sp.setViewportBorder(BorderFactory.createRaisedBevelBorder());
leftPanel.add(sp,BorderLayout.CENTER);
//          SymPropertyChange lSymPropertyChange = new SymPropertyChange();
//          JSplitPane1.addPropertyChangeListener(lSymPropertyChange);
          SymWindow aSymWindow = new SymWindow();
          this.addWindowListener(aSymWindow);
          SymComponent aSymComponent = new SymComponent();
          this.addComponentListener(aSymComponent);
     public JFrame1(String sTitle)
          this();
          setTitle(sTitle);
     public void setVisible(boolean b)
          if (b)
               setLocation(50, 50);
          super.setVisible(b);
     static public void main(String args[])
          (new JFrame1()).setVisible(true);
     public void addNotify()
          Dimension size = getSize();
          super.addNotify();
          if (frameSizeAdjusted)
               return;
          frameSizeAdjusted = false;
          Insets insets = getInsets();
          javax.swing.JMenuBar menuBar = getRootPane().getJMenuBar();
          int menuBarHeight = 0;
          if (menuBar != null)
               menuBarHeight = menuBar.getPreferredSize().height;
          setSize(insets.left + insets.right + size.width, insets.top + insets.bottom + size.height + menuBarHeight);
     boolean frameSizeAdjusted = false;
     javax.swing.JPanel JPanel1 = new javax.swing.JPanel();
     javax.swing.JSplitPane JSplitPane1 = new javax.swing.JSplitPane();
     /*class SymPropertyChange implements java.beans.PropertyChangeListener{
          public void propertyChange(java.beans.PropertyChangeEvent event){
               Object object = event.getSource();
               if (object == JSplitPane1)
                    JSplitPane1_propertyChange(event);
/*     void JSplitPane1_propertyChange(java.beans.PropertyChangeEvent event){
     System.out.println("!");
     sp.setSize((int)JSplitPane1.getLeftComponent().getBounds().getWidth()-2,(int)JSplitPane1.getLeftComponent().getBounds().getHeight()-2 );
     sp.repaint();
     tree.repaint();
     class SymWindow extends java.awt.event.WindowAdapter{
          public void windowActivated(java.awt.event.WindowEvent event){
               Object object = event.getSource();
               if (object == JFrame1.this)
                    JFrame1_windowActivated(event);
          public void windowIconified(java.awt.event.WindowEvent event){
               Object object = event.getSource();
               if (object == JFrame1.this)
                    JFrame1_windowIconified(event);
     void JFrame1_windowIconified(java.awt.event.WindowEvent event){
     void JFrame1_windowActivated(java.awt.event.WindowEvent event){
     class SymComponent extends java.awt.event.ComponentAdapter{
          public void componentShown(java.awt.event.ComponentEvent event){
               Object object = event.getSource();
               if (object == JFrame1.this)
                    JFrame1_componentShown(event);
          public void componentResized(java.awt.event.ComponentEvent event){
               Object object = event.getSource();
               if (object == JFrame1.this)
                    JFrame1_componentResized(event);
     void JFrame1_componentResized(java.awt.event.ComponentEvent event){
     System.out.println("!!");
          JPanel1.setSize(this.getContentPane().getMaximumSize());
          JSplitPane1.setSize((int)JPanel1.getMaximumSize().getWidth()-5,(int)JPanel1.getMaximumSize().getHeight()-5 );
          topPanel.setBounds(0, 0, rightPanel.getWidth()-3, 25);
          bottomPanel.setBounds(0,26,rightPanel.getWidth()-3,rightPanel.getHeight()-28);
          sp.setSize((int)leftPanel.getMaximumSize().getWidth(),(int)leftPanel.getMaximumSize().getHeight());
     sp.setAutoscrolls(true);
     //sp.setSize((int)JSplitPane1.getLeftComponent().getBounds().getWidth()-2,(int)JSplitPane1.getLeftComponent().getBounds().getHeight()-2 );
     sp.repaint();
     //sp.setSize((int)leftPanel.getSize().getWidth(),(int)leftPanel.getSize().getHeight() );
     void JFrame1_componentShown(java.awt.event.ComponentEvent event){
     System.out.println("!!!");
          JPanel1.setSize(this.getContentPane().getMaximumSize());
          JSplitPane1.setSize((int)JPanel1.getMaximumSize().getWidth()-5,(int)JPanel1.getMaximumSize().getHeight()-5 );
          topPanel.setBounds(0, 0, rightPanel.getWidth()-3, 25);
     sp.setSize((int)JSplitPane1.getLeftComponent().getBounds().getWidth()-2,(int)JSplitPane1.getLeftComponent().getBounds().getHeight()-2 );
     sp.repaint();
          bottomPanel.setBounds(0,26,rightPanel.getWidth()-3,rightPanel.getHeight()-28);
}

hi sculz,
i develped the tree, and tree selection listener also the 4 th point i didnt able to do . here is the code belo what i did.
iam not able to add the JSplit pane also.
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
public class Tree08 extends JFrame{
Hashtable theHashtable = new Hashtable();
int frameWidth = 300;
int frameHeight = 305;
int numberRows = 19;
JTree tree;
JPanel treePanel;
String plafClassName =
"com.sun.java.swing.plaf.motif.MotifLookAndFeel";
For future reference, the three plaf implementations
are:
com.sun.java.swing.plaf.metal.MetalLookAndFeel
com.sun.java.swing.plaf.motif.MotifLookAndFeel
com.sun.java.swing.plaf.windows.WindowsLookAndFeel
JLabel display;
public static void main(String args[]) {
new Tree08();
public Tree08 () {
theHashtable.put("Cabbage","Good in slaw");
theHashtable.put("Squash","The yellow variety");
theHashtable.put("Onion","Not too hot");
theHashtable.put("Squirrel","Likes to store nuts");
theHashtable.put("Rabbit","Runs fast");
theHashtable.put("Fox","Crazy like a ...");
theHashtable.put("Horse","Fun to ride");
theHashtable.put("Pig","Lives in mud");
theHashtable.put("Cow","Gives us milk");
theHashtable.put("Peach","From Georgia");
theHashtable.put("Grape","Saueeze into wine");
theHashtable.put("Apple","Red delicious");
theHashtable.put("Orange","Very juicy");
DefaultMutableTreeNode[] theTreeNodes = new
DefaultMutableTreeNode[numberRows];
theTreeNodes[0] = new DefaultMutableTreeNode("Sample
Tree");
theTreeNodes[1] = new
DefaultMutableTreeNode("Vegetables");
theTreeNodes[2] = new
DefaultMutableTreeNode("Cabbage");
theTreeNodes[3] = new
DefaultMutableTreeNode("Squash");
theTreeNodes[4] = new
DefaultMutableTreeNode("Onion");
theTreeNodes[5] = new
DefaultMutableTreeNode("Animals");
theTreeNodes[6] = new
DefaultMutableTreeNode("Forrest");
theTreeNodes[7] = new
DefaultMutableTreeNode("Squirrel");
theTreeNodes[8] = new
DefaultMutableTreeNode("Rabbit");
theTreeNodes[9] = new DefaultMutableTreeNode("Fox");
theTreeNodes[10] = new
DefaultMutableTreeNode("Farm");
theTreeNodes[11] = new
DefaultMutableTreeNode("Horse");
theTreeNodes[12] = new DefaultMutableTreeNode("Pig");
theTreeNodes[13] = new DefaultMutableTreeNode("Cow");
theTreeNodes[14] = new
DefaultMutableTreeNode("Fruit");
theTreeNodes[15] = new
DefaultMutableTreeNode("Peach");
theTreeNodes[16] = new
DefaultMutableTreeNode("Grape");
theTreeNodes[17] = new
DefaultMutableTreeNode("Apple");
theTreeNodes[18] = new
DefaultMutableTreeNode("Orange");
theTreeNodes[0].add(theTreeNodes[1]);
theTreeNodes[1].add(theTreeNodes[2]);
theTreeNodes[1].add(theTreeNodes[3]);
theTreeNodes[1].add(theTreeNodes[4]);
theTreeNodes[0].add(theTreeNodes[5]);
theTreeNodes[5].add(theTreeNodes[6]);
theTreeNodes[6].add(theTreeNodes[7]);
theTreeNodes[6].add(theTreeNodes[8]);
theTreeNodes[6].add(theTreeNodes[9]);
theTreeNodes[5].add(theTreeNodes[10]);
theTreeNodes[10].add(theTreeNodes[11]);
theTreeNodes[10].add(theTreeNodes[12]);
theTreeNodes[10].add(theTreeNodes[13]);
theTreeNodes[0].add(theTreeNodes[14]);
theTreeNodes[14].add(theTreeNodes[15]);
theTreeNodes[14].add(theTreeNodes[16]);
theTreeNodes[14].add(theTreeNodes[17]);
theTreeNodes[14].add(theTreeNodes[18]);
treePanel = new TreePanel(theTreeNodes[0]);
tree.addTreeSelectionListener(new MyTreeListener());
Container content = getContentPane();
content.add(treePanel,BorderLayout.CENTER);
display = new JLabel("Display Selection Here");
content.add(display,BorderLayout.SOUTH);
setSize(frameWidth, frameHeight);
setTitle("Copyright 1998, R.G.Baldwin");
setVisible(true);
this.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);}
class MyTreeListener implements TreeSelectionListener{
public void valueChanged(TreeSelectionEvent e) {
DefaultMutableTreeNode theNode =
(DefaultMutableTreeNode)
(e.getPath().getLastPathComponent());
if (theNode.isLeaf()) {
display.setText((String)theHashtable.get(
theNode.getUserObject()));
class TreePanel extends JPanel {
public TreePanel(TreeNode root){
setLayout(new BorderLayout());
tree = new JTree(root);
JScrollPane sp = new JScrollPane(tree);
add(sp, BorderLayout.CENTER);
try{
UIManager.setLookAndFeel(plafClassName);
}catch(Exception ex){System.out.println(ex);}
SwingUtilities.updateComponentTreeUI(this);
for(int cnt = 0; cnt < numberRows; cnt++){
tree.expandRow(cnt);
regards
sonali

Sorting the raws of JTree

How do i sort the raws which are there in one JTree. But here we have added JTree in JTable. And i want to sort the values of JTree depending on the click of the column of the JTable.

There is already a topic on this subject
http://forum.java.sun.com/thread.jsp?forum=57&thread=563889&tstart=45&trange=15
Denis Krukovsky
http://dotuseful.sourceforge.net/

Sorting the nodes of a JTree

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