JTree是不是有问题?(在JTree中删除一个节点时)__private_JMenuItem_DefaultMutableTreeNode_JTree_jTreeUser_

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JTree是不是有问题?(在JTree中删除一个节点时)

来源: 互联网发布时间：2015-01-06

本文导语: 在JTree中删除一个节点时,当时可以看到节点已经被删除掉了,可是当我把树合上,再次展开时,节点为什么还存在? 程序如下: TreePath path = selectionModel.getSelectionPath(); MutableTreeNode node = (MutableTreeNode)path.getLastPathComponent();...

在JTree中删除一个节点时,当时可以看到节点已经被删除掉了,可是当我把树合上,再次展开时,节点为什么还存在?
程序如下:
TreePath path = selectionModel.getSelectionPath();
MutableTreeNode node = (MutableTreeNode)path.getLastPathComponent();
model.removeNodeFromParent(node);

这是我修改过后的代码:

package UserManage;

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

public class UserManageFrame extends JFrame
       implements ActionListener,MenuListener{
  private JPopupMenu popup;
  private MouseAdapter msAdapter;
  private JTree jTreeUser;
  private JTree jTreeTest;
  private static DefaultTreeModel model;
  private TreeSelectionModel selectionModel;
  private DefaultMutableTreeNode nodeChoosed; //记录当前被选中的节点的信息
  private DefaultMutableTreeNode nodeGroup;
  private DefaultMutableTreeNode nodeRole;
  private Vector UserGroup;                   //记录所有用户组的信息
  private Object[][] UserInGroup;             //记录用户组中所有用户
  private Vector Roles;                       //记录所有角色的信息
  private JMenuItem addGroup;
  private JMenuItem delGroup;
  private JMenuItem modifyGroup;
  private JMenuItem addUser;
  private JMenuItem delUser;
  private JMenuItem modifyUser;
  private JMenuItem addRole;
  private JMenuItem delRole;
  private JMenuItem modifyRole;
  private JMenuItem setRights;
  public UserManageFrame() {

    setTitle("权限管理系统");
    setSize(400,300);
    addWindowListener(new WindowAdapter(){
      public void windowClosing(WindowEvent e){
        System.exit(0);
      }
    });
    //Construct the User Tree root Node.
    DefaultMutableTreeNode root = new DefaultMutableTreeNode("权限管理");
    jTreeUser = new JTree(root);
    nodeGroup = new DefaultMutableTreeNode("用户组");
    root.add(nodeGroup);
    nodeRole = new DefaultMutableTreeNode("角色");
    root.add(nodeRole);
    jTreeUser = new JTree(root);
    model = (DefaultTreeModel)jTreeUser.getModel();
    selectionModel = jTreeUser.getSelectionModel();
    selectionModel.setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
    getAllGroupAndRole();
    for(int i = 0;i