请大家帮帮我吧，180分！

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;public class FileTree1 extends JFrame
{
public static final ImageIcon ICON_COMPUTER =
new ImageIcon("computer.gif");
public static final ImageIcon ICON_DISK =
new ImageIcon("disk.gif");
public static final ImageIcon ICON_FOLDER =
new ImageIcon("folder.gif");
public static final ImageIcon ICON_EXPANDEDFOLDER =
new ImageIcon("expandedfolder.gif"); protected JTree  m_tree;
protected DefaultTreeModel m_model;
protected JTextField m_display; public FileTree1()
{
super("Directories Tree");
setSize(400, 300); DefaultMutableTreeNode top = new DefaultMutableTreeNode(
new IconData(ICON_COMPUTER, null, "Computer")); DefaultMutableTreeNode node;
File[] roots = File.listRoots();
for (int k=0; k < roots.length; k++)
{
node = new DefaultMutableTreeNode(new IconData(ICON_DISK,
null, new FileNode(roots[k])));
top.add(node);
                        node.add( new DefaultMutableTreeNode(new Boolean(true)));
} m_model = new DefaultTreeModel(top);
m_tree = new JTree(m_model);                m_tree.putClientProperty("JTree.lineStyle", "Angled"); TreeCellRenderer renderer = new IconCellRenderer();
m_tree.setCellRenderer(renderer); m_tree.addTreeExpansionListener(new DirExpansionListener()); m_tree.addTreeSelectionListener(new DirSelectionListener()); m_tree.getSelectionModel().setSelectionMode(
TreeSelectionModel.SINGLE_TREE_SELECTION);
m_tree.setShowsRootHandles(true);
m_tree.setEditable(false); JScrollPane s = new JScrollPane();
s.getViewport().add(m_tree);
getContentPane().add(s, BorderLayout.CENTER); m_display = new JTextField();
m_display.setEditable(false);
getContentPane().add(m_display, BorderLayout.NORTH); WindowListener wndCloser = new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
};
addWindowListener(wndCloser); setVisible(true);
} DefaultMutableTreeNode getTreeNode(TreePath path)
{
return (DefaultMutableTreeNode)(path.getLastPathComponent());
} FileNode getFileNode(DefaultMutableTreeNode node)
{
if (node == null)
return null;
Object obj = node.getUserObject();
if (obj instanceof IconData)
  obj = ((IconData)obj).getObject();
if (obj instanceof FileNode)
  return (FileNode)obj;
else
  return null;
}      class DirExpansionListener implements TreeExpansionListener
    {
        public void treeExpanded(TreeExpansionEvent event)
        {
            final DefaultMutableTreeNode node = getTreeNode(
                event.getPath());
            final FileNode fnode = getFileNode(node);            Thread runner = new Thread()
            {
              public void run()
              {
                if (fnode != null && fnode.expand(node))
                {
                  Runnable runnable = new Runnable()
                  {
                    public void run()
                    {
                       m_model.reload(node);
                    }
                  };
                  SwingUtilities.invokeLater(runnable);
                }
              }
            };
            runner.start();
        }        public void treeCollapsed(TreeExpansionEvent event) {}
    }
class DirSelectionListener implements TreeSelectionListener
{
public void valueChanged(TreeSelectionEvent event)
{
DefaultMutableTreeNode node = getTreeNode(
event.getPath());
FileNode fnode = getFileNode(node);
if (fnode != null)
m_display.setText(fnode.getFile().
getAbsolutePath());
else
m_display.setText("");
}
} public static void main(String argv[])
{
new FileTree1();
}
}class IconCellRenderer extends    JLabel implements TreeCellRenderer
{
protected Color m_textSelectionColor;
protected Color m_textNonSelectionColor;
protected Color m_bkSelectionColor;
protected Color m_bkNonSelectionColor;
protected Color m_borderSelectionColor; protected boolean m_selected; public IconCellRenderer()
{
super();
m_textSelectionColor = UIManager.getColor(
"Tree.selectionForeground");
m_textNonSelectionColor = UIManager.getColor(
"Tree.textForeground");
m_bkSelectionColor = UIManager.getColor(
"Tree.selectionBackground");
m_bkNonSelectionColor = UIManager.getColor(
"Tree.textBackground");
m_borderSelectionColor = UIManager.getColor(
"Tree.selectionBorderColor");
setOpaque(false);
} public Component getTreeCellRendererComponent(JTree tree,
Object value, boolean sel, boolean expanded, boolean leaf,
int row, boolean hasFocus) {
DefaultMutableTreeNode node =
(DefaultMutableTreeNode)value;
Object obj = node.getUserObject();
setText(obj.toString());                if (obj instanceof Boolean)
                  setText("Retrieving data..."); if (obj instanceof IconData)
{
IconData idata = (IconData)obj;
if (expanded)
  setIcon(idata.getExpandedIcon());
else
  setIcon(idata.getIcon());
}
else
setIcon(null); setFont(tree.getFont());
setForeground(sel ? m_textSelectionColor : m_textNonSelectionColor);
setBackground(sel ? m_bkSelectionColor : m_bkNonSelectionColor);
m_selected = sel;
return this;
} public void paintComponent(Graphics g)
{
Color bColor = getBackground();
Icon icon = getIcon(); g.setColor(bColor);
int offset = 0;
if(icon != null && getText() != null)
offset = (icon.getIconWidth() + getIconTextGap());
g.fillRect(offset, 0, getWidth() - 1 - offset,
getHeight() - 1); if (m_selected)
{
g.setColor(m_borderSelectionColor);
g.drawRect(offset, 0, getWidth()-1-offset, getHeight()-1);
}
super.paintComponent(g);
    }
}class IconData
{
protected Icon   m_icon;
protected Icon   m_expandedIcon;
protected Object m_data; public IconData(Icon icon, Object data)
{
m_icon = icon;
m_expandedIcon = null;
m_data = data;
} public IconData(Icon icon, Icon expandedIcon, Object data)
{
m_icon = icon;
m_expandedIcon = expandedIcon;
m_data = data;
} public Icon getIcon()
{
return m_icon;
} public Icon getExpandedIcon()
{
return m_expandedIcon!=null ? m_expandedIcon : m_icon;
} public Object getObject()
{
return m_data;
} public String toString()
{
return m_data.toString();
}
}class FileNode
{
protected File m_file; public FileNode(File file)
{
m_file = file;
} public File getFile()
{
return m_file;
} public String toString()
{
return m_file.getName().length() > 0 ? m_file.getName() :
m_file.getPath();
} public boolean expand(DefaultMutableTreeNode parent)
{
DefaultMutableTreeNode flag =
(DefaultMutableTreeNode)parent.getFirstChild();
if (flag==null)   // No flag
return false;
Object obj = flag.getUserObject();
if (!(obj instanceof Boolean))
return false;      // Already expanded parent.removeAllChildren();  // Remove Flag File[] files = listFiles();
if (files == null)
return true; Vector v = new Vector(); for (int k = 0; k < files.length; k++)
{
File f = files[k];
if (!(f.isDirectory()))
continue; FileNode newNode = new FileNode(f); boolean isAdded = false;
for (int i = 0; i < v.size(); i++)
{
FileNode nd = (FileNode)v.elementAt(i);
if (newNode.compareTo(nd) < 0)
{
v.insertElementAt(newNode, i);
isAdded = true;
break;
}
}
if (!isAdded)
v.addElement(newNode);
} for (int i = 0; i < v.size(); i++)
{
FileNode nd = (FileNode)v.elementAt(i);
IconData idata = new IconData(FileTree1.ICON_FOLDER,
FileTree1.ICON_EXPANDEDFOLDER, nd);
DefaultMutableTreeNode node = new
DefaultMutableTreeNode(idata);
parent.add(node); if (nd.hasSubDirs())
node.add(new DefaultMutableTreeNode(
new Boolean(true) ));
} return true;
} public boolean hasSubDirs()
{
File[] files = listFiles();
if (files == null)
return false;
for (int k = 0; k < files.length; k++)
{
if (files[k].isDirectory())
return true;
}
return false;
} public int compareTo(FileNode toCompare)
{
return  m_file.getName().compareToIgnoreCase(
toCompare.m_file.getName() );
} protected File[] listFiles()
{
if (!m_file.isDirectory())
return null;
try
{
return m_file.listFiles();
}
catch (Exception ex)
{
JOptionPane.showMessageDialog(null,
"Error reading directory "+m_file.getAbsolutePath(),
"Warning", JOptionPane.WARNING_MESSAGE);
return null;
}
}
}
原来可以贴上的，那就不用mail了，请大家帮帮忙！谢了。
你那问题已经弄好了
class FileNode去掉
if (!(f.isDirectory()))
continue;
两行代码就可以了
谢谢gdsean(摇滚java)，你试的可以吗？
怎么我的还是原样？

调试易

请大家帮帮我吧，180分！

解决方案 »