Ho to set different Icon for different Jtree Nodes dynamically??

Question

Dar Friends:
I have following code.
But if poosible I hope to:
[1]. Dynamically assign or st each node with different Icons;
[2]. these icons have different sizes, hope to resize them with same size, ie. 20X 20
But try whole day, no idea how to to it,
Can somebody throw a light??
Thanks
Good weekends
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
/** JTree with missing or custom icons at the tree nodes.
*  1999 Marty Hall, http://www.apl.jhu.edu/~hall/java/
public class CustomIcons extends JFrame {
  public static void main(String[] args) {
    new CustomIcons();
  private Icon customOpenIcon = new ImageIcon("images/Circle_1.gif");
  private Icon customClosedIcon = new ImageIcon("images/Circle_2.gif");
  private Icon customLeafIcon = new ImageIcon("images/Circle_3.gif");
  public CustomIcons() {
    super("JTree Selections");
    Container content = getContentPane();
    content.setLayout(new FlowLayout());
    DefaultMutableTreeNode root =
      new DefaultMutableTreeNode("Root");
    DefaultMutableTreeNode child;
    DefaultMutableTreeNode grandChild;
    for(int childIndex=1; childIndex<4; childIndex++) {
      child = new DefaultMutableTreeNode("Child " + childIndex);
      root.add(child);
      for(int grandChildIndex=1; grandChildIndex<4; grandChildIndex++) {
        grandChild =
          new DefaultMutableTreeNode("Grandchild " + childIndex +
                                     "." + grandChildIndex);
        child.add(grandChild);
    JTree tree3 = new JTree(root);
    tree3.expandRow(3); // Expand children to illustrate leaf icons
    DefaultTreeCellRenderer renderer3 = new DefaultTreeCellRenderer();
    renderer3.setOpenIcon(customOpenIcon);
    renderer3.setClosedIcon(customClosedIcon);
    renderer3.setLeafIcon(customLeafIcon);
    tree3.setCellRenderer(renderer3);
    JScrollPane pane3 = new JScrollPane(tree3);
    pane3.setBorder(BorderFactory.createTitledBorder("Custom Icons"));
    content.add(pane3);
    pack();
    setVisible(true);
}

Answer 1

Thanks for your advice,I post my code as below, (I cannot post Max 5000, so post twice)
[1]. main:
import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.*;
import java.awt.*;
     public class JTreeNew  extends JFrame {
       public JTreeNew() {
         super("Editable Tree Frame");
            JTreeSub js = new JTreeSub();
         setSize(200, 200);
        // WindowUtilities.setNativeLookAndFeel();
        // addWindowListener(new ExitListener());
         setDefaultCloseOperation(EXIT_ON_CLOSE);
       public class JTreeSub  extends JTree implements TreeSelectionListener{
            DefaultTreeModel treeModel;
            JTree tree;
            ContainerIconNode selectedNode;
            public JTreeSub() {
            super();
            init();
            public void init(){
              ContainerIconNode Root = new ContainerIconNode("images/Root.GIF");
              ContainerIconNode Animal = new ContainerIconNode("images/Animal.GIF");
              ContainerIconNode Cat = new ContainerIconNode("images/Cat.GIF");
              ContainerIconNode Fish = new ContainerIconNode("images/Fish.GIF");
              ContainerIconNode GoldFish = new ContainerIconNode("images/GoldFish.GIF");
              ContainerIconNode CatFish = new ContainerIconNode("images/CatFish.jpg");
              ContainerIconNode Solomon = new ContainerIconNode("images/Solomon.GIF");
              ContainerIconNode DogFish = new ContainerIconNode("images/DogFish.GIF");
              ContainerIconNode Dog = new ContainerIconNode("images/Dog.jpg");
              ContainerIconNode Mouse = new ContainerIconNode("images/Mouse.GIF");
              ContainerIconNode Chicken = new ContainerIconNode("images/Chicken.GIF");
              ContainerIconNode Pig = new ContainerIconNode("images/Pig.GIF");
              treeModel = new DefaultTreeModel(Animal);
              tree = new JTree(treeModel);
              tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
              ToolTipManager.sharedInstance().registerComponent(tree);
              //Listen for when the selection changes.
             tree.addTreeSelectionListener(this);
              tree.setEditable(true);
              treeModel.insertNodeInto(Animal,Root, 0);
              Animal.add(Cat);
              Animal.add(Fish);
              Fish.add(GoldFish);
              Fish.add(CatFish);
              Fish.add(Solomon);
              Fish.add(DogFish);
              Animal.add(Dog);
              Animal.add(Mouse);
              Animal.add(Chicken);
              Animal.add(Pig);
              tree.expandRow(3); // Expand children to illustrate leaf icons
     //         DefaultTreeCellRenderer renderer = new DefaultTreeCellRenderer();
     //         renderer.setOpenIcon(Animal.getImageIcon());
     //         renderer.setClosedIcon(Dog.getImageIcon());
     //         renderer.setLeafIcon(CatFish.getImageIcon());
     //         tree.setCellRenderer(renderer);
              ImageIcon startIcon = new ImageIcon("images/89.gif");
              tree.setCellRenderer(new MyRenderer(startIcon));
              getContentPane().add(tree, BorderLayout.CENTER);
          @Override
          public void valueChanged(TreeSelectionEvent e) {
               selectedNode = (ContainerIconNode)
                                tree.getLastSelectedPathComponent();
             if (selectedNode == null) return;
             Object nodeInfo = selectedNode.getUserObject();
             if (selectedNode.isLeaf()) {
                  System.out.println("<JTreeNew> Node is  leaf=");
             } else {
                  System.out.println("<JTreeNew> Node is  folder");
       private class MyRenderer extends DefaultTreeCellRenderer {
             Icon nodeIcon;
             public MyRenderer(ImageIcon icon) {
                  nodeIcon=icon;
             public Component getTreeCellRendererComponent(
                                 JTree tree,
                                 Object value,
                                 boolean sel,
                                 boolean expanded,
                                 boolean leaf,
                                 int row,
                                 boolean hasFocus) {
//                  System.out.println("<JTreeNew> Tree="+ tree);
//                  System.out.println("<JTreeNew> nodeIcon="+ nodeIcon);
                  System.out.println("\n<JTreeNew> value="+ value);
                  System.out.println("<JTreeNew> sel="+ sel+"\n");
//                  System.out.println("<JTreeNew> expanded="+ expanded);
//                  System.out.println("<JTreeNew> leaf="+ leaf);
//                  System.out.println("<JTreeNew> row="+ row);
//                  System.out.println("<JTreeNew> hasFocus="+ hasFocus);
                 return this;
       public static void main(String args[]) {
            JTreeNew st = new JTreeNew();
            st.setVisible(true);
     }