JTree remove expand/collapse cross button...??

Question

Hi all,
I have forbidden tree collapsing (by default it is fully expanded),
and I want to remove expand/collapse cross buttons that actually are used to expand/collapse tree nodes.
Is it possible and can anyone give me advice how i can do this.
Thanks in advance.

Answer 1

I tried extending the BasicTreeUI to return nulls for the collapsed and exapnded icons as shown in the code below. For the most part, it works great! However, one can still expand/collapse the tree by clicking on the point where the vertical and horizontal lines connect.
I guess some one else will take over from here.
import java.awt.BorderLayout;
import javax.swing.Icon;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.WindowConstants;
import javax.swing.plaf.basic.BasicTreeUI;
import javax.swing.tree.DefaultMutableTreeNode;
public class Temp extends JFrame {
     private JTree tree = null;
     public Temp() {
          super("Test");
          setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          initComponents();
          pack();
          setVisible(true);
     private void initComponents() {
          DefaultMutableTreeNode rootNode =
               new DefaultMutableTreeNode("User Preferences", true);
          DefaultMutableTreeNode connectionSettingsNode =
               new DefaultMutableTreeNode("Connection Settings", true);
          DefaultMutableTreeNode sslNode =
               new DefaultMutableTreeNode("SSL", false);
          DefaultMutableTreeNode firewallNode =
               new DefaultMutableTreeNode("Firewall", false);
          DefaultMutableTreeNode securityNode =
               new DefaultMutableTreeNode("Security", true);
          DefaultMutableTreeNode serverCertificatesNode =
               new DefaultMutableTreeNode("Server Certificates", false);
          DefaultMutableTreeNode clientCertificatesNode =
               new DefaultMutableTreeNode("Client Certificates", false);
          connectionSettingsNode.add(sslNode);
          connectionSettingsNode.add(firewallNode);
          securityNode.add(serverCertificatesNode);
          securityNode.add(clientCertificatesNode);
          rootNode.add(connectionSettingsNode);
          rootNode.add(securityNode);
          tree = new JTree(rootNode);
          JScrollPane scroller = new JScrollPane(tree);
          getContentPane().add(scroller, BorderLayout.CENTER);
          tree.setUI(new MyTreeUI());
          //tree.setShowsRootHandles(false);
     public static void main(String args []) {
          new Temp();
     class MyTreeUI extends BasicTreeUI {
          public Icon getCollapsedIcon() {
               return null;
          public Icon getExpandedIcon() {
               return null;
}Sai Pullabhotla