Jtree node info

Hi there all,
I am making a swing application using jtree and i have a problem faced.
I need some help.
I create a default node
final Object bookId=me.getKey();
inal Object bookName=me.getValue();
DefaultMutableTreeNode book = new DefaultMutableTreeNode(here??);
i have a treemap and in this there is an id and a name list.
what i want to do,
when i click to a node in a tree i want to get both name and id for this node. but i couldnt.
How can i put bot name and id in the nodes? Names will be nodes name?
thanks.

public class Book {
Object id;
Object name;
new DefaultMutableTreeNode(book);Then write a TreeCellRenderer to display the node-with-book how you want it (or override toString() for the easy way out).

Similar Messages

Xml in JTree: how to not collpase JTree node, when renaming XML Node.

Hi.
I'm writing some kind of XML editor. I want to view my XML document in JTree and make user able to edit contents of XML. I made my own TreeModel for JTree, which straight accesses XML DOM, produced by Xerces. Using DOM Events, I made good-looking JTree updates without collapsing JTree on inserting or removing XML nodes.
But there is a problem. I need to produce to user some method of renaming nodes. As I know, there is no way to rename node in w3c DOM. So I create new one with new name and copy all children and attributes to it. But in this way I got a new object of XML Node instead of renamed one. And I need to initiate rebuilding (treeStructureChanged event) of JTree structure. Renamed node collapses. If I use treeNodesChanged event (no rebuilding, just changes string view of JTree node), then when I try to operate with renamed node again, exception will be throwed.
Is there some way to rename nodes in my program without collpasing JTree?
I'am new to Java. Maybe there is a method in Xerces DOM implementation to rename nodes without recreating?
Thanks in advance.

I assume that "rename" means to change the element name? Anyway your question seems to be "When I add a node to a JTree, how do I make sure it is expanded?" This is completely concerned with Swing, so it might have been better to post it in the Swing forum, but if it were me I would do this:
1. Copy the XML document into a JTree.
2. Allow the user to edit the document. Don't attempt to keep an XML document or DOM synchronized with the contents of the JTree.
3. On request of the user, copy the JTree back to a new XML document.
This way you can "rename" things to the user's heart's content without having the problem you described.

PopupMenu on Jtree nodes Please [b]Help me][/b]

how can I set my JpopupMenu to work on Jtree nodes and not on the tree?

how can I set my JpopupMenu to work on Jtree nodes
and not on the tree?Could you elaborate? Are you asking that popup events are ignored if the mouse click is not actually on the rendered area of a node or are you asking something else?

How to sort Jtree node?

Now, I want to sort tree node by increasing.
for example there are three child node:
[20 -40][
10 - 20]
[30- 60].
they are added to JTree node by different order.but are shown in increasingorder.
like this:
[10 - 20]
[20 -40][
[30- 60].
how to control tree node.

Implement the Comparable interface in t he userobject class and possibly the toString(0 as well.
Ex.
public class UserObject implements java.lang.Comparable{
public int compareTo(Object obj) throws ClassCastException
public String toString()

Jtree node refuses to collapse upon clicking handle; makeVisible() was used

Hello,
While creating a new node and inserting as a leaf in the JTree, I use tree.makeVisible(newTreePath) to expand the new node and make visible. (Using expandPath() will not expand if a leaf was added).
However now the jtree node refuses to collapse upon clicking the node handle.
How do I get it to not insist on staying open - be able to collapse manually?
thanks,
Anil

This is the JNI forum. I don't believe your post fits.
then
can I correctly assume that any class that
"implements Cloneable" will handle making either a
"shallow" or "deep" ... or even "semi-shallow" clone,
respective to the class context .. right?
It probably does something. The implementor might not have implemented anything though. And you have no idea what they implemented.
No idea about your other question.
You might want to think carefully about why you are cloning though.

Multiline text in a jtree node

i'm not able to add the multiline text in a jtree node. i've checked the data in both the cases before adding into the tree and after adding into the tree. itz getting the data in the proper format. but while displaying inside the tree itz taking into the single line.
kindly help me to get the data in a multi line format in the jtree.
thanks in advance.
import java.awt.*;
import java.awt.event.*;
import java.sql.Connection;
import java.sql.Statement;
import java.sql.ResultSet;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.text.*;
public class DynamicTreeDemo extends JPanel {
public static String transactionName=null;
String p1Name=null;
   public static String duration=null;
    public static final String NEWLINE = System.getProperty("line.separator");
static String[] arrCorrelatorId={"110","122","129","132","130","136","111","109","131","124","127",null};
static String[] arrParcorrelatorId={"108","110","122","129","122","130","108","108","109","121","121"};
static String[] arrtransactionName={"FINT3","FINT17","FINT20","FINT52","FINT21","FINT18","FINT4","FINT3"," FINT31","FINT19","FINT51"};
public static MutableTreeNode node;
public static DefaultTreeModel model;
public static TreePath path;
public static JTree tree;
static String[] nodeName={"FINT3_108","FINT17_110","FINT20_122","FINT52_129","FINT21_122","FINT18_110","FINT4_108","FINT3_108"," FINT31_109","FINT19_121","FINT51_121",null};
public DynamicTreeDemo(JFrame frame) {
final DynamicTree treePanel = new DynamicTree(transactionName);
populateTree(treePanel);
JTextField name = new JTextField(20);
setLayout(new BorderLayout());
treePanel.setPreferredSize(new Dimension(300, 150));
add(treePanel, BorderLayout.CENTER);
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(10,50));
add(panel, BorderLayout.EAST);
public DefaultMutableTreeNode newObj(String parent){
DefaultMutableTreeNode pname= new DefaultMutableTreeNode(parent);
return pname;
public void populateTree(DynamicTree treePanel)
     String p3;
     DefaultMutableTreeNode p2,nNode, p1;
     int ind=0, i=0,k=0, len=0, m=0;
     boolean flag= false;
     String desc;
     while(nodeName[m]!=null)
     p3 = nodeName[m];
     ind = p3.indexOf("_");
     p3 = p3.substring(0, ind);
       desc=NEWLINE +"hi"+NEWLINE+"how r u";
     if(arrParcorrelatorId[m].equals(arrParcorrelatorId[0]))
               treePanel.addObject(null, p3,desc);
     else{
          int loopcount=0;
          for(int j=0;nodeName[j]!=null;j++)
                    if(arrParcorrelatorId[m].equals(arrParcorrelatorId[j]))
                         for(int p=0;nodeName[p]!=null;p++)
                                   if(arrCorrelatorId[p].equals(arrParcorrelatorId[j]))
                                        p1=newObj(arrtransactionName[p]);
                                        System.out.println("parent:"+p1);
                                        System.out.println("child:"+p3);
                                        treePanel.addObject(p1, p3,desc);
                                        break;
                    break;
          m++;
public static void showNodes(String corrId)
     transactionName="FINT3";
public void DynamicDisplayNode(String corrId){
JFrame frame = new JFrame("DynamicTreeDemo");
showNodes(corrId);
Container contentPane = frame.getContentPane();
contentPane.setLayout(new GridLayout(1,1));
contentPane.add(new DynamicTreeDemo(frame));
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
frame.pack();
frame.setVisible(true);
public static void main(String[] args)
JFrame frame1=null;
DynamicTreeDemo demo= new DynamicTreeDemo(frame1);
demo.DynamicDisplayNode("108");
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.util.Enumeration;
import java.util.StringTokenizer;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.border.Border;
import javax.swing.border.LineBorder;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.*;
public class DynamicTree extends JPanel {
    protected DefaultMutableTreeNode rootNode;
    protected DefaultTreeModel treeModel;
    protected JTree tree;
    protected DefaultTreeCellRenderer linksRenderer;
    public static final String NEWLINE = System.getProperty("line.separator");
    public DynamicTree(String appName) {
         rootNode = new DefaultMutableTreeNode(appName);
        treeModel = new DefaultTreeModel(rootNode);
        tree = new JTree(treeModel);
        tree.setEditable(false);
        tree.setShowsRootHandles(true);
        tree.setBackground(Color.white);
        tree.setCellRenderer(new DefaultTreeCellRenderer()
             public Component getTreeCellRendererComponent(JTree pTree,
                 Object pValue, boolean pIsSelected, boolean pIsExpanded,
                 boolean pIsLeaf, int pRow, boolean pHasFocus)
                   DefaultMutableTreeNode node = (DefaultMutableTreeNode)pValue;
                   JLabel lbl = (JLabel)super.getTreeCellRendererComponent(pTree, pValue, pIsSelected,pIsExpanded, pIsLeaf, pRow, pHasFocus);
                  lbl.setBorder(new LineBorder(Color.RED,1));
             /* Component c = super.getTreeCellRendererComponent(pTree, pValue, pIsSelected,
                     pIsExpanded, pIsLeaf, pRow, pHasFocus);
                       if (node.isRoot())
                                      c.setForeground(Color.red);
                      else if (node.getChildCount() > 0)
                                c.setForeground(Color.blue);
                       else if (pIsLeaf)
                                c.setForeground(Color.black);//new Color(0x736AFF));*/
                       setBackgroundNonSelectionColor(Color.white);
                       JPanel p = new JPanel();
                       p.setBackground(tree.getBackground());
                       Dimension d = lbl.getPreferredSize();
                       p.setPreferredSize(new Dimension(d.width, d.height));
                       p.add(lbl);
                       tree.setRowHeight(30);
              return (p);
        JScrollPane scrollPane = new JScrollPane(tree);
        setLayout(new GridLayout(1,0));
        add(scrollPane);
    public void addObject(DefaultMutableTreeNode parent,Object child,String desc)
        child=child+desc;
        //System.out.println("child"+child);
            DefaultMutableTreeNode     parent1;
        DefaultMutableTreeNode childNode =
                new DefaultMutableTreeNode(child);
          if (parent == null)
                      parent = rootNode;
          else
               String parentName = (String)parent.getUserObject();
               String tok;
               Enumeration e=null;
               e=(Enumeration) rootNode.breadthFirstEnumeration();
               int breakloop=0;
               parent = rootNode.getLastLeaf();
                while (e.hasMoreElements() ) {
                    if(parent!= null)
                         //System.out.println("parent.toString():"+parent.toString());
                         tok=parent.toString();
                         StringTokenizer st = new StringTokenizer(tok);
                         parent1=newObj(st.nextToken());
                         if(parent1.getUserObject().equals(parentName))
                                   breakloop=1;
                                   break;
                         parent= parent.getPreviousNode();
               if(breakloop==0)
                    parent = rootNode.getLastLeaf();
          System.out.println("parent.toString():"+parent.toString());
          System.out.println("childNode"+childNode.toString());
          parent.add(childNode);
public DefaultMutableTreeNode newObj(String parent){
      DefaultMutableTreeNode pname= new DefaultMutableTreeNode(parent);
          return pname;
class MyTreeModelListener implements TreeModelListener {
        public void treeNodesChanged(TreeModelEvent e) {
            DefaultMutableTreeNode node;
            node = (DefaultMutableTreeNode)
                     (e.getTreePath().getLastPathComponent());
            try {
                int index = e.getChildIndices()[0];
                node = (DefaultMutableTreeNode)
                       (node.getChildAt(index));
            } catch (NullPointerException exc) {}
        public void treeNodesInserted(TreeModelEvent e) {
        public void treeNodesRemoved(TreeModelEvent e) {
        public void treeStructureChanged(TreeModelEvent e) {
}

Here is a simple example.
import java.awt.BorderLayout;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
public class MultiLineTreeDemo extends JFrame {
     private JTree tree;
     public static void main( String[] args ) throws Exception {
          SwingUtilities.invokeLater( new Runnable() {
               public void run() { new MultiLineTreeDemo(); }
     public MultiLineTreeDemo() {
          super( "MultiLineTreeDemo" );
          setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
          DefaultMutableTreeNode root = new DefaultMutableTreeNode( "<html>This is<p>the root node.</html>" );
          DefaultMutableTreeNode node = new DefaultMutableTreeNode( "<html>This is<p>a child node.<html>" );
          root.add( node );
          tree = new JTree( root );
          setLayout( new BorderLayout() );
          JScrollPane scrollPane = new JScrollPane( tree );
          add( scrollPane, BorderLayout.CENTER );
          setSize( 200, 200 );
          setVisible( true );
}

Parse and display xml doc when click on JTree node?

Ok so here is the code that I have now. You will have to make alot of html files to run the program, but they can be empty for now. What you can do is just put the same exact html file to be displayed in each node element. for example.
DefaultMutableTreeNode n1_node1_b1 =
                    new DefaultMutableTreeNode(new ModuleInfo("Device", "device.html"));could be changed to
DefaultMutableTreeNode n1_node1_b1 =
                    new DefaultMutableTreeNode(new ModuleInfo("Device", "status.html"));And just keep adding the status.html page to each one of the nodes.
anyway.
For now when I click on the node, the html file is displayed in the JScrollPane rPane = new JScrollPane(htmlPane); and the htmlPane is a JEditorPane
what I need it to do.
When I click on the JTree node. I would like to go out to an xml file, parse the information in it, and display it to the pane.
I will need to later, be able to add, edit, or delete information on the xml through the pane later.
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.JTree;
import javax.swing.JPanel;
import javax.accessibility.*;
import javax.swing.UIManager;
import javax.swing.JComponent;
import javax.swing.JEditorPane;
import javax.swing.tree.TreeSelectionModel;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.ImageIcon;
import java.net.URL;
import java.io.IOException;
import java.awt.Dimension;
* @author orozcom
public class Example extends JFrame implements TreeSelectionListener
    private JEditorPane htmlPane;
    private URL helpURL;
    private static boolean DEBUG = false;
    private JTree tree;
    public Example()
        super("Example");
        setSize(1200,900);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        JMenuBar jmb = new JMenuBar();
        JMenu fileMenu = new JMenu("File");
        JMenuItem openItem = new JMenuItem("Open");
        JMenuItem saveItem = new JMenuItem("Save");
        JMenuItem exitItem = new JMenuItem("Exit");
        exitItem.addActionListener(new ActionListener()
            public void actionPerformed(ActionEvent ae)
                System.exit(0);
        fileMenu.add(openItem);
        fileMenu.add(saveItem);
        fileMenu.add(new JSeparator());
        fileMenu.add(exitItem);
        jmb.add(fileMenu);
        setJMenuBar(jmb);
        // **************** start JTree ******************//
        JPanel lPane =new JPanel();
        lPane.setLayout(new BorderLayout());
        DefaultMutableTreeNode top = new DefaultMutableTreeNode(new ModuleInfo("Devices","splashScreen.html"));
        DefaultMutableTreeNode branch1 =
                new DefaultMutableTreeNode(new ModuleInfo("Module 1", "module1.html"));
        DefaultMutableTreeNode branch2 =
                new DefaultMutableTreeNode(new ModuleInfo("Module 2", "module2.html"));
        //DefaultMutableTreeNode branch3 =
                //new DefaultMutableTreeNode(new ModuleInfo("Module 3", "module3.html"));
        //adding to the topmost node
        top.add(branch1);
        top.add(branch2);
        //top.add(branch3);
         *          BRANCH 1           *
        //adding to the First branch
        DefaultMutableTreeNode node1_b1
                =new DefaultMutableTreeNode(new ModuleInfo("Status", "status.html"));
        //branch1.add(node1_b1);
            DefaultMutableTreeNode n1_node1_b1 =
                    new DefaultMutableTreeNode(new ModuleInfo("Device", "device.html"));
            DefaultMutableTreeNode n2_node1_b1 =
                    new DefaultMutableTreeNode(new ModuleInfo("Network", "network.html"));
            DefaultMutableTreeNode n3_node1_b1 =
                    new DefaultMutableTreeNode(new ModuleInfo("Chassis", "chassis.html"));
            DefaultMutableTreeNode n4_node1_b1 =
                    new DefaultMutableTreeNode(new ModuleInfo("Resources", "resources.html"));
            node1_b1.add(n1_node1_b1);
            node1_b1.add(n2_node1_b1);
            node1_b1.add(n3_node1_b1);
            node1_b1.add(n4_node1_b1);
        DefaultMutableTreeNode node2_b1 =
                new DefaultMutableTreeNode(new ModuleInfo("Project Editor", "projedit.html"));
        DefaultMutableTreeNode node3_b1 =
                new DefaultMutableTreeNode(new ModuleInfo("Project Manager", "projmngt.html"));
        DefaultMutableTreeNode node4_b1 =
                new DefaultMutableTreeNode(new ModuleInfo("Administration", "administration.html"));
        DefaultMutableTreeNode n1_node4_b1 =
                new DefaultMutableTreeNode(new ModuleInfo("Device", "device.html"));
        DefaultMutableTreeNode n2_node4_b1 =
                new DefaultMutableTreeNode(new ModuleInfo("Network", "network.html"));
        DefaultMutableTreeNode n3_node4_b1 =
                new DefaultMutableTreeNode(new ModuleInfo("Users", "users.html"));
        node4_b1.add(n1_node4_b1);
        node4_b1.add(n2_node4_b1);
        node4_b1.add(n3_node4_b1);
        DefaultMutableTreeNode node5_b1 =
                new DefaultMutableTreeNode(new ModuleInfo("Logging", "logging.html"));
        branch1.add(node1_b1);
        branch1.add(node2_b1);
        branch1.add(node3_b1);
        branch1.add(node4_b1);
        branch1.add(node5_b1);
         *          BRANCH 2           *
        //adding to the Second branch
        DefaultMutableTreeNode node1_b2 =
                new DefaultMutableTreeNode(new ModuleInfo("Status", "status.html"));
            DefaultMutableTreeNode n1_node1_b2 =
                    new DefaultMutableTreeNode(new ModuleInfo("Device", "device.html"));
            DefaultMutableTreeNode n2_node1_b2 =
                    new DefaultMutableTreeNode(new ModuleInfo("Network", "network.html"));
            DefaultMutableTreeNode n3_node1_b2 =
                    new DefaultMutableTreeNode(new ModuleInfo("Chassis", "chassis.html"));
            DefaultMutableTreeNode n4_node1_b2 =
                    new DefaultMutableTreeNode(new ModuleInfo("Resources", "resources.html"));
            node1_b2.add(n1_node1_b2);
            node1_b2.add(n2_node1_b2);
            node1_b2.add(n3_node1_b2);
            node1_b2.add(n4_node1_b2);
        DefaultMutableTreeNode node2_b2=
                new DefaultMutableTreeNode(new ModuleInfo("Project Editor", "projedit.html"));
        DefaultMutableTreeNode node3_b2=
                new DefaultMutableTreeNode(new ModuleInfo("Project Manager", "projmngt.html"));
        DefaultMutableTreeNode node4_b2=
                new DefaultMutableTreeNode(new ModuleInfo("Administration", "administration.html"));
            DefaultMutableTreeNode n1_node4_b2=
                    new DefaultMutableTreeNode(new ModuleInfo("Device", "device.html"));
            DefaultMutableTreeNode n2_node4_b2=
                    new DefaultMutableTreeNode(new ModuleInfo("Network", "network.html"));
            DefaultMutableTreeNode n3_node4_b2=
                    new DefaultMutableTreeNode(new ModuleInfo("Users", "users.html"));
            node4_b2.add(n1_node4_b2);
            node4_b2.add(n2_node4_b2);
            node4_b2.add(n3_node4_b2);
        DefaultMutableTreeNode node5_b2=
                new DefaultMutableTreeNode(new ModuleInfo("Logging", "logging.html"));
        branch2.add(node1_b2);
        branch2.add(node2_b2);
        branch2.add(node3_b2);
        branch2.add(node4_b2);
        branch2.add(node5_b2);
         *          BRANCH 3           *
        //adding to the Third branch
        DefaultMutableTreeNode node1_b3=new DefaultMutableTreeNode("Status");
        DefaultMutableTreeNode n1_node1_b3=new DefaultMutableTreeNode("Device");
        DefaultMutableTreeNode n2_node1_b3=new DefaultMutableTreeNode("Network");
        DefaultMutableTreeNode n3_node1_b3=new DefaultMutableTreeNode("Chassis");
        DefaultMutableTreeNode n4_node1_b3=new DefaultMutableTreeNode("Resources");
        node1_b3.add(n1_node1_b3);
        node1_b3.add(n2_node1_b3);
        node1_b3.add(n3_node1_b3);
        node1_b3.add(n4_node1_b3);
        DefaultMutableTreeNode node2_b3=new DefaultMutableTreeNode("Project Editor");
        DefaultMutableTreeNode node3_b3=new DefaultMutableTreeNode("Project Manager");
        DefaultMutableTreeNode node4_b3=new DefaultMutableTreeNode("Administration");
        DefaultMutableTreeNode n1_node4_b3=new DefaultMutableTreeNode("Device");
        DefaultMutableTreeNode n2_node4_b3=new DefaultMutableTreeNode("Network");
        DefaultMutableTreeNode n3_node4_b3=new DefaultMutableTreeNode("Users");
        node4_b3.add(n1_node4_b3);
        node4_b3.add(n2_node4_b3);
        node4_b3.add(n3_node4_b3);
        DefaultMutableTreeNode node5_b3=new DefaultMutableTreeNode("Logging");
        branch3.add(node1_b3);
        branch3.add(node2_b3);
        branch3.add(node3_b3);
        branch3.add(node4_b3);
        branch3.add(node5_b3);
        tree=new JTree(top,true);
        //tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.CONTIGUOUS_TREE_SELECTION);
        //Set the icon for leaf nodes.
        ImageIcon deviceIcon = createImageIcon("/device.gif");
        if (deviceIcon != null)
            DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
            renderer.setLeafIcon(deviceIcon);
            tree.setCellRenderer(renderer);
        else
            System.err.println("Leaf icon missing; using default.");
        //Listen for when the selection changes.
        tree.addTreeSelectionListener(this);
        //Create the scroll pane and add the tree to it.
        //JScrollPane treeView = new JScrollPane(tree);
        tree.setToolTipText(" and ");
        lPane.add(tree);
        getContentPane().add(lPane);
        // **************** end JTree ******************//
        htmlPane = new JEditorPane();
        htmlPane.setEditable(false);
        initHelp();
        JScrollPane rPane = new JScrollPane(htmlPane);
        JSplitPane jsp = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, lPane, rPane);
        jsp.setDividerLocation(180);
        getContentPane().add(jsp, BorderLayout.CENTER);
        JPanel bPane = new JPanel();
        JButton okButton = new JButton("Ok");
        JButton applyButton = new JButton("Apply");
        JButton clearButton = new JButton("Clear");
        bPane.add(okButton);
        bPane.add(applyButton);
        bPane.add(clearButton);
        getContentPane().add(bPane, BorderLayout.SOUTH);
        setVisible(true);
    /** Required by TreeSelectionListener interface. */
    public void valueChanged(TreeSelectionEvent e)
        DefaultMutableTreeNode node = (DefaultMutableTreeNode)
        tree.getLastSelectedPathComponent();
        if (node == null) return;
        Object nodeInfo = node.getUserObject();
        if (node.isLeaf())
            ModuleInfo module = (ModuleInfo)nodeInfo;
            displayURL(module.moduleURL);
            if (DEBUG)
                System.out.print(module.moduleURL + ": \n    ");
        else
            displayURL(helpURL);
        if (DEBUG)
            System.out.println(nodeInfo.toString());
    private class ModuleInfo
        public String deviceName;
        public URL moduleURL;
        public ModuleInfo(String device, String filename)
            deviceName = device;
            moduleURL = (URL)Example.class.getResource("/" + filename);
            if (moduleURL == null)
                System.err.println("Couldn't find file: "
                        + filename);
        public String toString()
            return deviceName;
    private void initHelp()
        String s = "YFDemoHelp.html";
        helpURL = Example.class.getResource("/" + s);
        if (helpURL == null)
            System.err.println("Couldn't open help file: " + s);
        else if (DEBUG)
            System.out.println("Help URL is " + helpURL);
        displayURL(helpURL);
    private void displayURL(URL url)
        try
            if (url != null)
                htmlPane.setPage(url);
            else
            { //null url
                htmlPane.setText("File Not Found");
                if (DEBUG)
                    System.out.println("Attempted to display a null URL.");
        catch (IOException e)
            System.err.println("Attempted to read a bad URL: " + url);
    /** Returns an ImageIcon, or null if the path was invalid. */
    protected static ImageIcon createImageIcon(String path)
        java.net.URL imgURL = Example.class.getResource(path);
        if (imgURL != null)
            return new ImageIcon(imgURL);
        else
            System.err.println("Couldn't find file: " + path);
            return null;
    public static void main(String args[])
        new Example();
        //new AssistiveExample();
}Thanks orozcom

yes i can at the time of MIRO u can see both
go in SU01 for and user
in Parameters enter IVFIDISPLAY in Parameter ID and X in Paramater Value
thus for that user u will be able to c Invoice number and accounting number after saving MIRo
u will get message like
Invoice document 5105608893 was posted ( Accountng Documnt: 5100000000 )
hope this helps

Set different color for one JTree node

hello,
I managed to find how to set a color for Jtree nodes but the problem is that with my method all the nodes will b the same color whereas i'm looking to have nodes of different color depending on the situation.
the method for setting all Jtree nodes the same color(other than black):
tree.setCellRenderer(
new DefaultTreeCellRenderer() {
   public Color getTextNonSelectionColor() {
     return Color.lightGray; } });I WANT TO CHOSSE EACH COLOR FOR EACH NODE
help plz
thanks

You need to implement TreeCellRenderer interface
public Component getTreeCellRendererComponent(JTree tree,
                                              Object value,
                                              boolean sel,
                                              boolean expanded,
                                              boolean leaf,
                                              int row,
                                              boolean hasFocus)You can know which node is rendering by check value argument. Please read DefaultTreeCellRenderer's code.

Node info of a table cell

Dear All,
I am creating a web dynpro view for sales order, I have to apply a front end check using message pool.
How to apply any validation on a table cell? I tried it on my side I am getting the message for the validation for each row but the corresponding filed is not being focused after message, but the same thing I am applying on header data then corresponding field is been focused if validation goes true.
How to send the correct cell node info to the message manager, if any one has done it then please solve this issue.
Thanks in Advance..

If you are comfortable in ALV (in WD) then you can use that option, here you have different events and method to read the selected cell.
You want row or cell.
why you need that in WDDOMODIFYVIEW. Are you familiar with leadselection or not..?

How to get the icon type of a JTree node, very urgent

hi,
i need to get the type of a JTree node but don't know how. this is quite an emergency. please help. thank you all.
-joey

there are several icons defined in the DefaultTreeCellRenderer class, such as closedIcon, leafIcon, openIcon. i was wondering if there is any way to get the icon type of a node. thanks for your reply.
-joey

How to clear value set values from node info

Hi,
I have set some values on value set to display on a dropdown in my view. using following method.
l_node_info->set_attribute_value_set( name = 'XYZ' value_set = l_value_set ).
Now i need to clear node info value set. Otherwise particular attribute which i used for dropdown is always showing values added .
Please suggest how to clear value set.
Thanks,
Venkat.

Hi,
Interface IF_WD_CONTEXT_NODE_INFO is for metadata of a node. It has nothing to do with the values in dropdown list.
In order to manipulate the values in the dropdown of an attributes, you can use the IF_WD_CONTEXT_NODE.
As you are saying its a dropdown, what I can suggest is to write supply function for the node.
And then get the index (V_INDEX) of the value you wanted to see in the dropdown list, and then use the following code in the method WDDOINIT
LO_NODE->SET_LEAD_SELECTION_INDEX( INDEX = V_TABIX ).

Please help with JTree Node Duplication

Iam building a JTree which should not allow node duplication.
1.)First i construct a ArrayList which stores all the previous nodes.
treeNodeNames=new ArrayList();
2.)i call the method
          readTreeNodeNames((DefaultMutableTreeNode)dtm.getRoot());
3.)The method readTreeNodeNames is
public void readTreeNodeNames(DefaultMutableTreeNode node) {
          if(node.toString().toLowerCase().length()!=0) {
          treeNodeNames.add(node.toString().toLowerCase());
          for(Enumeration en=node.children();en.hasMoreElements();) {
               DefaultMutableTreeNode childNode=(DefaultMutableTreeNode)en.nextElement();
               if(childNode.toString().toLowerCase().length()!=0) {
                    treeNodeNames.add(childNode.toString().toLowerCase());
               if(!childNode.isLeaf()) {
                    readTreeNodeNames(childNode);
4.)i have four menu when right click a node add,modify,add subnode,delete.
node duplication fails in my case.when should i call this method?should i call while doing every above mentioned operations or in TreeModelEvent implementations?
i have mailed this problem already two times.but no one has not replied.Kinldy consider it and give me a solution.Or anyone having code for JTree Node duplication please send me to [email protected]

Hi all,
Any ideas to overcome this problem.?
Thanks,
Krish

How to get the TreePath of a JTree Node

hello all:
Given a DefaultMutableTreeNode JTree node, how i can
get the TreePath for it.
because I want to use this method to fire the function expandPath(TreePath path)
thank you very much!
-Daniel Mark

thank you I had got idea from forum
http://forum.java.sun.com/thread.jsp?forum=31&thread=381249
thx again.
-Daniel

Can not highlight a JTree node programmatically

Hi Swing lovers,
I can select a node using setSelectionPath. Unfortunately I can not find a way to show the user that the node is selected. I know it can be done. When traversing the tree with the up- and down keyboard arrow, it shows what I want to see.
Am I overlooking some method here?
Thanks a lot for the tip,
Erik

Thanks DrClap,
I expected to find an easy way to mark a jTree node as being selected. However the TreeCellRenderer does the job. See the code snipped below:
public JTree jTree1 = new JTree();
private TreeNode currentNode = null;
//assing currentNode somewhere in you code
jTree1.setCellRenderer(new MyRenderer());
private class MyRenderer extends DefaultTreeCellRenderer {
    public MyRenderer() {
    public Component getTreeCellRendererComponent(
                            JTree tree,
                            Object value,
                            boolean sel,
                            boolean expanded,
                            boolean leaf,
                            int row,
                            boolean hasFocus) {
      if (currentNode != null) {
        if (value.hashCode() == currentNode.hashCode()) sel = true;
    super.getTreeCellRendererComponent(
                            tree, value, sel,
                            expanded, leaf, row,
                            hasFocus);
    return this;
/

How to post an Event (mouse left click) to JTree node

Hi,
I am using JTree for my application just like the windows explorer tree. By default, Jtree node will got focus using left click. But, I'd like that my tree will detect a right click so that I can copy any file to the Jtree. I've added a mouselistener to it but the node is not selected by the right click. Anyboby can teach me how to post a mouse left click event to the Jtree so that it will become selected using left click.
Thanks a million

See if this is useful
public void mouseClicked(MouseEvent event)
Object object = event.getSource();
if (object == mTree)
mTree_mouseClicked(event);
private void mTree_mouseClicked(MouseEvent event)
if(event.getModifiers()==event.BUTTON3_MASK)
//your logic goes here
}//close method

Jtree node info

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