JBuilder高手请进，JTree中删除了一个结点然后聚焦在它的父结点上该怎么办？最好还能触发valueChanged事件?

罪魁祸首就是
selparent.remove(selnd);
使用了这一条之后必须使用
treeModel.reload();
来刷新整个树
而这样selection和expand状态就完全改变了。

请参考下边的例子：
使用
_model.removeNodeFromParent(node);
来删除一个节点：

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
import java.awt.*;
import java.awt.event.*;

public class Test extends JFrame {
    JTree _tree = new JTree();
    DefaultTreeModel _model = (DefaultTreeModel)_tree.getModel();
    TreeSelectionModel _selectionModel = _tree.getSelectionModel();
    JButton _removeButton = new JButton("Remove selected node");

    public Test()
    {
        Container contentPane = getContentPane();
        _selectionModel.setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);

        contentPane.add(new ControlPanel(), BorderLayout.NORTH);
        contentPane.add(_tree, BorderLayout.CENTER);

        _tree.addTreeSelectionListener(new TreeSelectionListener(){

            public void valueChanged(TreeSelectionEvent e)
            {
                TreePath path = e.getNewLeadSelectionPath();
                boolean nodesAreSelected = (path != null);
                _removeButton.setEnabled(nodesAreSelected);
            }
        });
    }
    class ControlPanel extends JPanel
    {
        public ControlPanel()
        {
            _removeButton.setEnabled(false);
            add(_removeButton);
            _removeButton.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    TreePath path = 
                             _selectionModel.getSelectionPath();

                    if(path.getPathCount() == 1) {
                        JOptionPane.showMessageDialog(ControlPanel.this,
                                        "Can't remove root node!");
                        return;
                    }

                    MutableTreeNode node = 
                     (MutableTreeNode)path.getLastPathComponent();
                    
                    TreePath parentPath = path.getParentPath();

                    _model.removeNodeFromParent(node);

                    _tree.setSelectionPath(parentPath);
                }
            });
        }
    }
    public static void main(String args[]) {
        GraphicJavaApplication.launch(new Test(), 
                    "_tree Model Example",300,300,450,300);
    }
}
class GraphicJavaApplication extends WindowAdapter
{
    public static void launch(final JFrame f, String title,
                              final int x, final int y, 
                              final int w, int h)
    {
        f.setTitle(title);
        f.setBounds(x,y,w,h);
        f.setVisible(true);
        f.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
        f.addWindowListener(new WindowAdapter()
        {
            public void windowClosed(WindowEvent e)
            {
                System.exit(0);
            }
        });
    }
}