jtreeexam.java

来自「Java程序设计实用教程源代码 本书源代码按章分别放置在不同的文件夹中,所有程」· Java 代码 · 共 31 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
public class JtreeExam extends JFrame{
  public JtreeExam() {
  	super("JTree演示");
    this.setLayout(new BorderLayout());
    DefaultMutableTreeNode root=new DefaultMutableTreeNode("Java 2");
    DefaultMutableTreeNode child=new DefaultMutableTreeNode("第一章");
    root.add(child);
    child.add(new DefaultMutableTreeNode("第1节"));
    child.add(new DefaultMutableTreeNode("第2节"));
    child.add(new DefaultMutableTreeNode("第3节"));
    JTree tree=new JTree(root,true);
    JScrollPane pane=new JScrollPane();
    pane.getViewport().add(tree);
    this.add(pane,BorderLayout.CENTER);
    setSize(270,160);
    setVisible(true);
  }
  public static void main(String args[]) {
    JtreeExam jframe = new JtreeExam();
    jframe.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
  }
}