急。。jfiletree调用 。。。小题高分急！

 import java.awt.BorderLayout;
import java.io.File;    import java.io.FileNotFoundException;    import java.util.concurrent.ExecutionException;    import java.util.logging.Level;    import java.util.logging.Logger;import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
    import javax.swing.JTree;
import javax.swing.SwingWorker;    import javax.swing.event.TreeExpansionEvent;    import javax.swing.event.TreeExpansionListener;import javax.swing.table.DefaultTableModel;
    import javax.swing.tree.DefaultMutableTreeNode;    import javax.swing.tree.DefaultTreeModel;import javax.swing.tree.TreePath;     /**     * 文件系统树     * @author xiaoYu Email: [email protected]     */    public class JFileTree extends JTree {         public static final boolean DIRECTORY_AND_FILE = true;//含有文件节点      public static final boolean DIRECTORY_NO_FILE = false;//不含有文件节点      private static final String DESKTOP_EN = "Desktop";        private static final String DESKTOP_ZH = "桌面";        private static final String DISK_EN = "Disk";        private JFileTreeNode systemNode = null;        private JFileTreeNode rootNode;        private DefaultTreeModel jFileTreeModel;        private boolean model;//显示文件或不显示文件       public JFileTree() throws FileNotFoundException {            this(DIRECTORY_AND_FILE);        }
      public JFileTree(boolean model) {          this(null, model);      }      public JFileTree(File file) {          this(file, DIRECTORY_AND_FILE);      }      public JFileTree(File file, boolean model) {          this.model = model;          putClientProperty("JTree.lineStyle", "Angled");          //建立默认系统文件树          if (file == null || !file.exists()) {              file = new File(System.getProperty("user.home") + File.separator + DESKTOP_EN);              if (!file.exists()) {                  file = new File(System.getProperty("user.home") + File.separator + DESKTOP_ZH);              }              rootNode = systemNode = new JFileTreeNode(file);          } else {              rootNode = new JFileTreeNode(file);          }          rootNode.expand();          jFileTreeModel = new DefaultTreeModel(rootNode);
          
          setModel(jFileTreeModel);          addTreeExpansionListener(new JTreeExpansionListener());      }      public String getPathName(TreePath path) {          Object o = path.getLastPathComponent();          if (o instanceof JFileTreeNode) {              return ((JFileTreeNode) o).file.getAbsolutePath();          }          return null;      }      /**       * 文件树节点       */
     
      protected class JFileTreeNode extends DefaultMutableTreeNode {          protected File file;          protected boolean isDirectory;
          
          public JFileTreeNode(File file) {              this.file = file;              //判断该文件是文件还是文件夹
              isDirectory = file.isDirectory();
            
              setUserObject(file);          }          @Override
          //是否是根接点
          public boolean isLeaf() {              if (file == null) {                  return false;              }              return !isDirectory;          }          @Override          public String toString() {              if (file.getParentFile() == null) {                  return DISK_EN + "(" + file.getPath().substring(0, 2) + ")";              } else {                  return file.getName();              }          }          @Override          public boolean getAllowsChildren() {              return isDirectory;          }          /**           * 节点展开           * @return 展开是否含有子节点           */          public boolean expand() {              this.removeAllChildren();              if (this.equals(systemNode)) {                  File[] roots = File.listRoots();                  for (int i = 0; i < roots.length; i++) {                      if (roots[i].exists()) {                          this.add(new JFileTreeNode(roots[i]));                      }                  }              }              File[] files = file.listFiles();              if (files == null) {                  return false;              }              for (int i = 0; i < files.length; i++) {                  File f = files[i];                  /**                   * 文件夹必添加                   * 文件则受系统文件树model控制                   */                  if (f.isDirectory() || model) {                      this.add(new JFileTreeNode(f));                  }              }              return true;          }      }      protected class JTreeExpansionListener implements TreeExpansionListener {          public void treeExpanded(TreeExpansionEvent e) {              JFileTreeNode fileNode = (JFileTreeNode) e.getPath().getLastPathComponent();              if (fileNode != null) {                  new FileNodeExpansion(fileNode).execute();              }          }          public void treeCollapsed(TreeExpansionEvent e) {          }      }      /**       * 展开节点的后台线程       */      protected class FileNodeExpansion extends SwingWorker<Boolean, Void> {          private JFileTreeNode node;          public FileNodeExpansion(JFileTreeNode node) {              this.node = node;          }          @Override          protected Boolean doInBackground() throws Exception {              return node.expand();          }          @Override          protected void done() {              try {                  //节点可以展开                  if (get()) {                      jFileTreeModel.reload(node);                  }              } catch (InterruptedException ex) {                  Logger.getLogger(JFileTree.class.getName()).log(Level.SEVERE, null, ex);              } catch (ExecutionException ex) {                  Logger.getLogger(JFileTree.class.getName()).log(Level.SEVERE, null, ex);              }          }      }
      
      
      public static void main(String args[]){
     //DefaultTableModel model = new DefaultTableModel(srcdata, cname);
       
     JScrollPane js = new JScrollPane(); 
       File file = new File("f:\\");
       JTree jft;
       try {
jft = new JFileTree(file);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
JTable jt = new JTable();
jt.add(jft);//----这里报错。好象是不支持该参数。。不就是继承了一下么，怎么就不支持了呢
      }  }//从入口函数开始往下到结束是问题所在位置，上面的jfiletree类就不要看了，是权威人士写的，至于是哪个我也不知道，反正是没错了，我的问题是：我想用jtable将jtree嵌套进去，可是却报错。。