为什么节点展开时 鼠标要改变状态 我不希望鼠标状态改变 怎么做 thks

Question

import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;
import java.awt.*;public class TreeExpandEventDemo2 extends JPanel {
    DemoArea demoArea;
    JTextArea textArea;
    final static String newline = "\n";    public TreeExpandEventDemo2() {
        super(new GridBagLayout());
        GridBagLayout gridbag = (GridBagLayout) getLayout();
        GridBagConstraints c = new GridBagConstraints();        c.fill = GridBagConstraints.BOTH;
        c.gridwidth = GridBagConstraints.REMAINDER;
        c.weightx = 1.0;
        c.weighty = 1.0;        c.insets = new Insets(1, 1, 1, 1);
        demoArea = new DemoArea();
        gridbag.setConstraints(demoArea, c);
        add(demoArea);        c.insets = new Insets(0, 0, 0, 0);
        textArea = new JTextArea();
        textArea.setEditable(false);
        JScrollPane scrollPane = new JScrollPane(textArea);
        scrollPane.setVerticalScrollBarPolicy(
                JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        scrollPane.setPreferredSize(new Dimension(200, 75));
        gridbag.setConstraints(scrollPane, c);
        add(scrollPane);        setPreferredSize(new Dimension(450, 450));
        setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
    }    void saySomething(String eventDescription, TreeExpansionEvent e) {
        textArea.append(eventDescription + "; "
                        + "path = " + e.getPath()
                        + newline);
    }    class DemoArea extends JScrollPane implements TreeExpansionListener,
            TreeWillExpandListener {
        Dimension minSize = new Dimension(100, 100);
        JTree tree;
        Object[] willExpandOptions = {"Cancel Expansion", "Expand"};
        String willExpandText = "A branch node is about to be expanded.\n"
                                + "Click \"Cancel Expansion\" to prevent it.";
        String willExpandTitle = "Tree Will Expand";        public DemoArea() {
            TreeNode rootNode = createNodes();
            tree = new JTree(rootNode);
            tree.setCursor(new Cursor(Cursor.HAND_CURSOR));// set the cursor style 
            tree.addTreeExpansionListener(this);
            tree.addTreeWillExpandListener(this);            setViewportView(tree);
        }        private TreeNode createNodes() {
            DefaultMutableTreeNode root;
            DefaultMutableTreeNode grandparent;
            DefaultMutableTreeNode parent;
            DefaultMutableTreeNode child;            root = new DefaultMutableTreeNode("San Francisco");            grandparent = new DefaultMutableTreeNode("Potrero Hill");
            root.add(grandparent);
            //
            parent = new DefaultMutableTreeNode("Restaurants");
            grandparent.add(parent);
            child = new DefaultMutableTreeNode("Thai Barbeque");
            parent.add(child);
            child = new DefaultMutableTreeNode("Goat Hill Pizza");
            parent.add(child);
            //
            parent = new DefaultMutableTreeNode("Grocery Stores");
            grandparent.add(parent);
            child = new DefaultMutableTreeNode("Good Life Grocery");
            parent.add(child);
            child = new DefaultMutableTreeNode("Safeway");
            parent.add(child);            grandparent = new DefaultMutableTreeNode("Noe Valley");
            root.add(grandparent);
            //
            parent = new DefaultMutableTreeNode("Restaurants");
            grandparent.add(parent);
            child = new DefaultMutableTreeNode("Hamano Sushi");
            parent.add(child);
            child = new DefaultMutableTreeNode("Hahn's Hibachi");
            parent.add(child);
            //
            parent = new DefaultMutableTreeNode("Grocery Stores");
            grandparent.add(parent);
            child = new DefaultMutableTreeNode("Real Foods");
            parent.add(child);
            child = new DefaultMutableTreeNode("Bell Market");
            parent.add(child);            return root;
        }        public Dimension getMinimumSize() {
            return minSize;
        }        public Dimension getPreferredSize() {
            return minSize;
        }        //Required by TreeWillExpandListener interface.
        public void treeWillExpand(TreeExpansionEvent e) throws
                ExpandVetoException {                synchronized (this) {
                  try {                  
                    System.out.println("load data... ... ");//tree expandding... ...
                    this.wait(3000);
                  }
                  catch (InterruptedException ex) {
                    ex.printStackTrace();
                  }
                }        }        //Required by TreeWillExpandListener interface.
        public void treeWillCollapse(TreeExpansionEvent e) {
            saySomething("Tree-will-collapse event detected", e);
        }        // Required by TreeExpansionListener interface.
        public void treeExpanded(TreeExpansionEvent e) {
            saySomething("Tree-expanded event detected", e);
        }        // Required by TreeExpansionListener interface.
        public void treeCollapsed(TreeExpansionEvent e) {
            saySomething("Tree-collapsed event detected", e);
        }
    }
    /**
     * Create the GUI and show it.  For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);        //Create and set up the window.
        JFrame frame = new JFrame("TreeExpandEventDemo2");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        //Create and set up the content pane.
        JComponent newContentPane = new TreeExpandEventDemo2();
        newContentPane.setOpaque(true); //content panes must be opaque
        frame.setContentPane(newContentPane);        //Display the window.
        frame.pack();
        frame.setVisible(true);
    }    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}