treeexample.java

来自「由浅入深的介绍JAVAse的基本编程思想」· Java 代码 · 共 48 行

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.DefaultMutableTreeNode;
public class TreeExample {
	public static void main(String args[]){
		JFrame myFrame = new JFrame("Tree Example");
		DefaultMutableTreeNode rootNode = createNodes();
		JTree tree = new JTree(rootNode);
		tree.setRootVisible(true);
		JScrollPane pane = new JScrollPane();
		pane.setViewportView(tree);
		myFrame.add("Center",pane);
		myFrame.setSize(400,250);
		myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		myFrame.setVisible(true);
	}
	
	public static DefaultMutableTreeNode createNodes(){
		DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("Java Stuff");
		DefaultMutableTreeNode resources = new DefaultMutableTreeNode("Resources");
		DefaultMutableTreeNode tools = new DefaultMutableTreeNode("Tools");
		rootNode.add(resources);
		rootNode.add(tools);
		
		DefaultMutableTreeNode webSites =new DefaultMutableTreeNode("Web Sites");
		DefaultMutableTreeNode books = new DefaultMutableTreeNode("Books");
		resources.add(webSites);
		resources.add(books);
		
		DefaultMutableTreeNode magazines = new DefaultMutableTreeNode("Magazines");
		magazines.add(new DefaultMutableTreeNode ("Javology"));
		magazines.add(new DefaultMutableTreeNode ("JavaWorld"));
		
		webSites.add(new DefaultMutableTreeNode ("JavaSoft"));
		webSites.add(new DefaultMutableTreeNode ("Gamelan"));
		webSites.add(magazines);
		
		books.add(new DefaultMutableTreeNode("Special Edition Using Java 1.2"));		
		tools.add(new DefaultMutableTreeNode ("JBuilder"));
		tools.add(new DefaultMutableTreeNode ("Visual J++"));
		tools.add(new DefaultMutableTreeNode ("Visual Age for Java"));
		tools.add(new DefaultMutableTreeNode ("Apptivity"));
		
		return rootNode;
	}
}