treeevents.java

由于想一次上传成功 所以将二个教程打包成了一个 这些例子几乎包含了所有java的框架集合

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

/*
<APPLET
    CODE = treeevents.class
    WIDTH = 350
    HEIGHT = 280 >
</APPLET>
*/

public class treeevents extends JApplet 
{
    public void init()
    {
        JTree tree = new JTree();

        getContentPane().add(new JScrollPane(tree));

        tree.addMouseListener(new MouseAdapter() {
            public void mousePressed(MouseEvent e) 
            {
                String outString = null;
                JTree jtree = (JTree)e.getSource();

                int clickedrow = jtree.getRowForLocation(e.getX(), e.getY());

                if(clickedrow != -1) {
                    TreePath treepath = jtree.getPathForRow(clickedrow);
                    TreeNode treenode = (TreeNode) treepath.getLastPathComponent(); 

                    outString = "Node " + treenode.toString();

                    if(e.getClickCount() == 1)
                    {
                        outString += " was single clicked.";
                    } else {
                        outString += " was double clicked.";
                    }

                    showStatus(outString);
                }
            }
        });
    }
}