我想用在java应用程序中放置一个路径选择对话框,哪有现成的东西可以用?

JFileChooser yours=new JFileChooser();
yours.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
youes.showOpenDialog(parent);

j2sdk1.4.0demojfcFileChooserDemo这个例子应该能满足你。

package pGComponent;

import java.awt.*;
import java.awt.event.*;
import java.io.File;
import javax.swing.*;
import java.beans.*;

/**
 * 

Title: 多文档

 * 

Description: 测试java多文档的实现

 * 

Copyright: Copyright (c) 2002

 * 

Company: 

 * @author unascribed
 * @version 1.0
 */

public class ViewFileChoose extends JFileChooser
{
ImagePreviewer previewer = new ImagePreviewer();
public String c ="name";
public  String name = "aaaa";


public ViewFileChoose()
{
super("FileChoose Components");
setAccessoryComponent();
this.showOpenDialog(null);
}
private void setAccessoryComponent()
{
JPanel previewPanel = new JPanel();

previewPanel.setLayout(new BorderLayout());
previewPanel.add(new JLabel("Image Previewer",
SwingConstants.CENTER),
BorderLayout.NORTH);
previewPanel.add(previewer, BorderLayout.CENTER);
previewer.setPreferredSize(new Dimension(200,0));
previewer.setBorder(BorderFactory.createEtchedBorder());

this.setAccessory(previewPanel);//设置打开文件对话框的附属组件
//new ImagePreviewerAccessoryAdapter(this, previewer);;
this.addPropertyChangeListener(new PropertyChangeListener()
{
public void propertyChange(PropertyChangeEvent e)
{
if(e.getPropertyName().equals( JFileChooser.SELECTED_FILE_CHANGED_PROPERTY))
{
previewer.update((File)e.getNewValue());
}
}
});
}

}

class ImagePreviewer extends JComponent
{
private ImageIcon icon;

public void update(File file)
{
Dimension size = getSize();
Insets insets = getInsets();
System.err.println(insets);

icon = new ImageIcon(file.getPath());

icon.setImage(icon.getImage().getScaledInstance(
size.width - insets.left - insets.right,
size.height - insets.top - insets.bottom,
Image.SCALE_SMOOTH));

if(isShowing())
{
repaint();
}
}
public void paintComponent(Graphics g)
{
Insets insets = getInsets();

super.paintComponent(g);

if(icon != null)
icon.paintIcon(this, g, insets.left, insets.top);
}
}