如何在JTree中将"我的电脑"设置成根目录

DDWae 2011-08-19 02:00:13

如何在JTree中将"我的电脑"设置成根目录,然后点击一下就会列出"我的电脑"下所有的盘.还有就是怎样获得各个盘的名称.例如我电脑的D盘我将他的名称改成了"Study",要怎样获得这个名称?

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shuwei003 2011-08-19

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只实现了最基本的，你可以根据这个扩展



import java.io.File;

import java.util.ArrayList;

import java.util.List;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTree;

import javax.swing.tree.DefaultMutableTreeNode;



public class N110819 {

	public static void main(String[] args) {

		//		 构造函数：JTree() 

		DefaultMutableTreeNode node1 =   new  DefaultMutableTreeNode( " 我的电脑 " , true);

		JTree example1  =   new  JTree(node1);

		JPanel panel  =   new  JPanel();

		List<String> root = getRoot();

		for(String s : root){

			node1.add(new DefaultMutableTreeNode(s, true));

		}

		panel.setSize(350, 350);

		panel.add(example1);

		//panel.add ( new  JScrollPane (example1);

		JFrame frame  =   new  JFrame ( " JTreeDemo " );

		frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

		frame.setSize(400,400);

		frame.setContentPane (panel);

		frame.setVisible(true);

	}



	static List<String> getRoot(){

		File[] root = File.listRoots();

		List<String> rootNames = new ArrayList<String>();

		for(File f : root){

			rootNames.add(f.toString());

		}

		return rootNames;

	}

}

Ely 2011-08-19

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package com.xcy.test;



import java.io.File;



import javax.swing.JFrame;

import javax.swing.JTree;

import javax.swing.filechooser.FileSystemView;

import javax.swing.tree.DefaultMutableTreeNode;



public class JTreeTest extends JFrame {

	public JTreeTest() {

		DefaultMutableTreeNode root = new DefaultMutableTreeNode("我的电脑");

		FileSystemView sys = FileSystemView.getFileSystemView();

		File[] files = File.listRoots();

		for (int i = 0; i < files.length; i++) {//测试的时候最好是把这行代码换成  for (int i = 1; i < 2; i++) { i=1在我机子上 是指定D盘

			DefaultMutableTreeNode temp = new DefaultMutableTreeNode(sys.getSystemDisplayName(files[i]));

			root.add(temp);

			bind(temp,files[i].toString());//测试的时候最好是把这行代码换成  bind(temp,"D:\xxx\xxx");指定一个文件夹，否则遍历整个文件系统会非常慢

		}

		JTree jtree = new JTree(root);

		this.add(jtree);

		this.setSize(500, 500);

		this.setVisible(true);

	}

	

	public void bind(DefaultMutableTreeNode node,String path){

		File file = new File(path);

		File[] files = file.listFiles();

		for(int i=0;files!=null && i<files.length;i++){

			File tempFile = files[i];

			if(tempFile.isDirectory()){

				DefaultMutableTreeNode tempNode = new DefaultMutableTreeNode(tempFile.getName());

				node.add(tempNode);

				bind(tempNode,tempFile.getAbsolutePath());

			}else{

				DefaultMutableTreeNode tempNode = new DefaultMutableTreeNode(tempFile.getName());

				node.add(tempNode);

			}

		}

	}



	public static void main(String[] args) {

		new JTreeTest();

	}

}