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{
public void MouseClicked(MouseEvent e)
这个类的方法就根本没有被调用,选中节点的名字就没有被设置。修改成下边这样就可以了
/*
* Created on 2003/09/18
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package com.tide.test.awt;import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;public class TreeDemo5 extends JFrame implements TreeModelListener {
JLabel label;
String nodeName; public TreeDemo5() {
super("treeDemo");
Container content = this.getContentPane();
DefaultMutableTreeNode root = new DefaultMutableTreeNode("explor");
DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("mydoc");
DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("mycomp");
DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("fiaviors");
DefaultMutableTreeNode node4 = new DefaultMutableTreeNode("Readme");
root.add(node1);
root.add(node2);
root.add(node3);
root.add(node4); DefaultMutableTreeNode leafnode = new DefaultMutableTreeNode("company");
node1.add(leafnode);
leafnode = new DefaultMutableTreeNode("my file");
node1.add(leafnode);
leafnode = new DefaultMutableTreeNode("myfile");
node1.add(leafnode); leafnode = new DefaultMutableTreeNode("c");
node2.add(leafnode);
leafnode = new DefaultMutableTreeNode("c");
node2.add(leafnode);
leafnode = new DefaultMutableTreeNode("e");
node2.add(leafnode); DefaultMutableTreeNode node31 = new DefaultMutableTreeNode("web");
node3.add(node31);
leafnode = new DefaultMutableTreeNode("kimo");
node31.add(leafnode);
leafnode = new DefaultMutableTreeNode("message");
node31.add(leafnode);
leafnode = new DefaultMutableTreeNode("shop");
node31.add(leafnode);
JTree tree = new JTree(root);
tree.addMouseListener(new MouseHandle(this));
tree.setEditable(true);
//tree.addMouseListener(); DefaultTreeModel treeModel = (DefaultTreeModel) tree.getModel();
treeModel.addTreeModelListener(this); JScrollPane s = new JScrollPane();
s.setViewportView(tree); label = new JLabel("change:");
content.add(s, BorderLayout.CENTER);
content.add(label, BorderLayout.SOUTH); pack();
show();
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
} public void treeNodesChanged(TreeModelEvent e) {
TreePath treePath = e.getTreePath();
DefaultMutableTreeNode node =
(DefaultMutableTreeNode) treePath.getLastPathComponent();
try {
int[] index = e.getChildIndices(); node = (DefaultMutableTreeNode) node.getChildAt(index[0]); } catch (NullPointerException exc) {
}
label.setText("[" + nodeName + "] change:[" + node.toString() + "]"); }
public void mouseClicked(MouseEvent e) {
JTree tree = (JTree) e.getSource(); TreePath treepath = tree.getSelectionPath();
DefaultMutableTreeNode treenode =
(DefaultMutableTreeNode) treepath.getLastPathComponent();
nodeName = treenode.toString(); }
public void treeNodesInserted(TreeModelEvent e) {
}
public void treeNodesRemoved(TreeModelEvent e) {
}
public void treeStructureChanged(TreeModelEvent e) {
}
public static void main(String[] args) {
new TreeDemo5();
}}
class MouseHandle extends MouseAdapter {
TreeDemo5 adp = null;
public MouseHandle(TreeDemo5 frame) {
adp = frame;
}
public void mouseClicked(MouseEvent e) {
adp.mouseClicked(e);
}
}