JTree节点名字修改？

监听鼠标事件,点击修改事件发生后,getSource()在右边的Jpanel中显示出来

你右边的Jpanel 内容都是从左边JTree里调出来的吧，那当你点击JTree的事件时，修改他的内容，右边的Jpanel自然就改变了

当我点击JTree的节点时，我怎么去判断我选择的是哪个层次的节点？
DefaultMutableTreeNode node = (DefaultMutableTreeNode) treepath.getLastPathComponent();
            Object object = node.getUserObject();
            Object[] nodes = treepath.getPath();
            if (nodes.length == 1) {
            } else if (nodes.length == 2) {
            }
           else if (nodes.length == 3) {

            } else if (nodes.length == 4) {

            } else if (nodes.length == 5) {}我可以这样去判断是获得是哪一个节点吗？
如果是这样的话，第一次按顺序下来可以，到nodes.length==5,
第5个节点的时候，我在返回去点击nodes.length的时候，返回不回去呢？

import java.awt.BorderLayout;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.DatagramPacket;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.StringTokenizer;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.WindowConstants;
import javax.swing.plaf.TreeUI;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
import sun.misc.Resource;import java.awt.Dimension;/**
*
*//**
* @author abei007
*
*/
public class TreeEditFrame extends JFrame { /**
*
*/
private static final long serialVersionUID = -8017762200230001186L; private DefaultTreeModel model; private JTree tree; static Socket socket; String name = ""; // PrintStream ps;
DefaultMutableTreeNode root = null; DefaultMutableTreeNode country = new DefaultMutableTreeNode("当前在线");; // @jve:decl-index=0: private JButton jButton = null; private JButton jButton1 = null; public TreeEditFrame() {
setTitle("TreeEditFrame");
setSize(275, 600); // add scroll pane with tree
JScrollPane scrollPane = new JScrollPane(tree);
add(scrollPane, BorderLayout.CENTER);
makeButtons(); // consturct tree
TreeNode root = makeSampleTree();
model = new DefaultTreeModel(root);
tree = new JTree(model);
tree.setEditable(true);
tree.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent e) {
if (e.getClickCount() == 2) {
TreePath path = tree.getSelectionPath();
if (path == null)
return;
DefaultMutableTreeNode node = (DefaultMutableTreeNode) path
.getLastPathComponent();
name = node.getUserObject().toString();
}
}
});
} private TreeNode makeSampleTree() {
// TODO 自动生成方法存根
DefaultMutableTreeNode root = new DefaultMutableTreeNode("FeiQ 聊天"); root.add(country);
country.add(new DefaultMutableTreeNode("San Diego"));
country.add(new DefaultMutableTreeNode("Michigan"));
return root;
} private void makeButtons() {
// TODO 自动生成方法存根 JPanel panel = new JPanel();
panel.setLayout(new BorderLayout());
JButton addSiblingButton = new JButton("Add Sibling");
addSiblingButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree
.getLastSelectedPathComponent();
if (selectedNode == null)
return; DefaultMutableTreeNode parent = (DefaultMutableTreeNode) selectedNode
.getParent();
if (parent == null)
return; DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(); int selectedIndex = parent.getIndex(selectedNode);
model.insertNodeInto(newNode, parent, selectedIndex + 1); // now display nes node TreeNode[] nodes = model.getPathToRoot(newNode);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path); }
});
panel.add(addSiblingButton, BorderLayout.WEST);
JButton addChildButton = new JButton("Add Child");
addChildButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree
.getLastSelectedPathComponent();
if (selectedNode == null)
return; DefaultMutableTreeNode newNode = new DefaultMutableTreeNode(
"New");
model.insertNodeInto(newNode, selectedNode, selectedNode
.getChildCount()); // now display new node
TreeNode[] nodes = model.getPathToRoot(newNode);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path); }
});
panel.add(addChildButton, BorderLayout.CENTER); JButton deleteButton = new JButton("Delete");
deleteButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree
.getLastSelectedPathComponent(); if (selectedNode != null && selectedNode.getParent() != null)
model.removeNodeFromParent(selectedNode); }
});
panel.add(deleteButton, BorderLayout.EAST);
panel.add(getJButton(), BorderLayout.NORTH);
panel.add(getJButton1(), BorderLayout.SOUTH);
add(panel, BorderLayout.SOUTH);
} /**
* This method initializes jButton
*
* @return javax.swing.JButton
*/
private JButton getJButton() {
if (jButton == null) {
jButton = new JButton();
jButton.setText("刷新");
jButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
System.out.println("actionPerformed()"); // TODO
// Auto-generated
// Event stub
// actionPerformed()
ClientListener t;
try {
country.removeAllChildren();
socket = new Socket("211.87.232.105", 7000);
t = new ClientListener(socket);
StringBuffer msg = new StringBuffer("CONNECT:");
String name = "111";
String ip = InetAddress.getLocalHost().toString();
msg.append(name + ":" + ip);
System.out.println(msg);
/* ps = new PrintStream(socket.getOutputStream()); */
t.ps.println(msg);
t.ps.flush(); System.out.println("222222222222222222222222");
String tmp = t.getmessage();
// ///////////////////////////////
StringTokenizer st = new StringTokenizer(tmp, ":");
String keyword = st.nextToken(); // 服务器端传来各种信息的处理
if (keyword.equals("PEOPLE")) { while (st.hasMoreTokens()) { String user = st.nextToken();
System.out.println(user);
DefaultMutableTreeNode tp = new DefaultMutableTreeNode(
user);
country.add(tp);
tree.updateUI();
}
}
// //////////////////////////////
} catch (UnknownHostException e1) {
// TODO 自动生成 catch 块
e1.printStackTrace();
} catch (IOException e1) {
// TODO 自动生成 catch 块
e1.printStackTrace();
}
// ClientListener(socket).start(); }
});
}
return jButton;
} /**
* This method initializes jButton1
*
* @return javax.swing.JButton
*/
private JButton getJButton1() {
if (jButton1 == null) {
jButton1 = new JButton();
jButton1.setText("群发");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent e) {
String message = JOptionPane.showInputDialog(
TreeEditFrame.this, "请输入群发信息", "信使群发",
JOptionPane.INFORMATION_MESSAGE);
if (message != null && !message.equals("")) {
TreePath[] selectionPaths = tree.getSelectionPaths();
System.out.println(selectionPaths);
// Resource.sendGroupMessenger(selectionPaths, message);
} else if (message != null && message.isEmpty()) {
JOptionPane.showMessageDialog(TreeEditFrame.this,
"不能发送空信息！");
} }
});
}
return jButton1;
} public static void main(String[] args) {
// TODO 自动生成方法存根 JFrame frame = new TreeEditFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true); } /*
* private static Thread ClientListener(Socket socket2) { // TODO 自动生成方法存根
* return null; }
*/
class ClientListener {
Socket socket; BufferedReader br; PrintStream ps; String message; public ClientListener(Socket s) {
try {
socket = s;
br = new BufferedReader(new InputStreamReader(socket
.getInputStream())); ps = new PrintStream(socket.getOutputStream());
} catch (IOException ex) { }
} public String getmessage() { try {
message = br.readLine();
System.out.println(message); } catch (IOException ex) { }
return message;
}
} public void closeSocket() {
if (socket != null) {
try {
socket.close();
} catch (IOException ex) {
// ta.append("Error: " + ex + "\n");
}
}
} // /////////////////////////////////////////////////////////////////////////////////////////////////////////}

调试易

JTree节点名字修改？

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