treedemo1.java

java入门经典教程 java入门经典教程 java入门经典教程

 // 例6.7.1 TreeDemo1.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
public class TreeDemo1
{
    JFrame frame;
    JScrollPane scrollPane;
    public TreeDemo1() 
{
        frame = new JFrame("视图树演示窗口");
        Container c = frame.getContentPane();
        
        DefaultMutableTreeNode root = new DefaultMutableTreeNode("根节点");
        DefaultMutableTreeNode branch1 = new DefaultMutableTreeNode("分支节点1");
        DefaultMutableTreeNode branch2 = new DefaultMutableTreeNode("分支节点2");
        DefaultMutableTreeNode branch3 = new DefaultMutableTreeNode("分支节点3");      
        root.add(branch1);root.add(branch2);root.add(branch3);
        
        branch1.add(new DefaultMutableTreeNode("叶子节点1"));
        branch1.add(new DefaultMutableTreeNode("叶子节点2"));
        branch1.add(new DefaultMutableTreeNode("叶子节点3"));
        
        branch2.add(new DefaultMutableTreeNode("叶子节点1"));
        branch2.add(new DefaultMutableTreeNode("叶子节点2"));
        branch2.add(new DefaultMutableTreeNode("叶子节点3"));
              
        JTree tree = new JTree(root);
        scrollPane = new JScrollPane();
        scrollPane.setViewportView(tree);
        c.add(scrollPane);
        
        frame.pack();
        frame.setVisible(true);
        frame.addWindowListener(new WindowAdapter(){
            public void windowClosing(WindowEvent e){
                System.exit(0);
            }
        });
    }
    public static void main(String[] args) 
{
        new TreeDemo1();
    }
    
}