怎么用库或者相关的类和方法：类JFileChooser 方法showOpenDialog（）类JColorChooser
设计一个图形浏览程序！

来个简单的,功能还不错:

import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.beans.*;
import java.util.*;
import java.io.*;
import javax.swing.*;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileView;
public class FileChooserTest
{
   public static void main(String[] args)
   {
      ImageViewerFrame frame = new ImageViewerFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
   }
}
class ImageViewerFrame extends JFrame
{
   public ImageViewerFrame()
   {
      setTitle(\"FileChooserTest\");
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
      JMenuBar menuBar = new JMenuBar();
      setJMenuBar(menuBar);
      JMenu menu = new JMenu(\"File\");
      menuBar.add(menu);
      JMenuItem openItem = new JMenuItem(\"Open\");
      menu.add(openItem);
      openItem.addActionListener(new FileOpenListener());
      JMenuItem exitItem = new JMenuItem(\"Exit\");
      menu.add(exitItem);
      exitItem.addActionListener(new
         ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               System.exit(0);
            }
         });
      label = new JLabel();
      add(label);
      chooser = new JFileChooser();
      // accept all image files ending with .jpg, .jpeg, .gif
      final ExtensionFileFilter filter = new ExtensionFileFilter();
      filter.addExtension(\"jpg\");
      filter.addExtension(\"jpeg\");
      filter.addExtension(\"gif\");
      filter.setDescription(\"Image files\");
      chooser.setFileFilter(filter);
      chooser.setAccessory(new ImagePreviewer(chooser));
      
      chooser.setFileView(new FileIconView(filter,null));
   }
   
   private class FileOpenListener implements ActionListener
   {
      public void actionPerformed(ActionEvent event)
      {
         chooser.setCurrentDirectory(new File(\".\"));
         int result = chooser.showOpenDialog(ImageViewerFrame.this);
         if(result == JFileChooser.APPROVE_OPTION)
         {
            String name = chooser.getSelectedFile().getPath();
            label.setIcon(new ImageIcon(name));
         }
      }
   }
   public static final int DEFAULT_WIDTH = 300;
   public static final int DEFAULT_HEIGHT = 400;  
   private JLabel label;
   private JFileChooser chooser;
}

class ExtensionFileFilter extends FileFilter
{
   public void addExtension(String extension)
   {
      if (!extension.startsWith(\".\"))
         extension = \".\" + extension;
      extensions.add(extension.toLowerCase());     
   }

   public void setDescription(String aDescription)
   {
      description = aDescription;
   }
 
   public String getDescription()
   {
      return description; 
   }
   public boolean accept(File f)
   {
      if (f.isDirectory()) return true;
      String name = f.getName().toLowerCase();
      for (String extension : extensions)
         if (name.endsWith(extension)) 
            return true;
      return false;
   }
   
   private String description = \"\";
   private ArrayList<String> extensions = new ArrayList<String>();
}

class FileIconView extends FileView
{
 
   public FileIconView(FileFilter aFilter, Icon anIcon)
   {
      filter = aFilter;
      icon = anIcon;
   }
   public Icon getIcon(File f)
   {
      if (!f.isDirectory() && filter.accept(f)) 
         return icon;
      else return null;
   }
   
   private FileFilter filter;
   private Icon icon;
}

class ImagePreviewer extends JLabel 
{
   public ImagePreviewer(JFileChooser chooser) 
   {
      setPreferredSize(new Dimension(100, 100));
      setBorder(BorderFactory.createEtchedBorder());
      chooser.addPropertyChangeListener(new 
         PropertyChangeListener()
         {
            public void propertyChange(PropertyChangeEvent 
               event) 
            {
               if (event.getPropertyName() ==
                  JFileChooser.SELECTED_FILE_CHANGED_PROPERTY)
               {
                  File f = (File) event.getNewValue();
                  if (f == null) { setIcon(null); return; }
                  
                  ImageIcon icon = new ImageIcon(f.getPath());
                  if(icon.getIconWidth() > getWidth())
                     icon = new ImageIcon(icon.getImage().getScaledInstance(
                        getWidth(), -1, Image.SCALE_DEFAULT));
                  setIcon(icon);
               }
     }
         });
   }
}

不错啊

一个程序的可读性要有注释啊！！！
不能这样回答别人啊

程序很简单,有不懂的地方可以自己查JAVA 文档.

哈哈,eastsun有我当年的风范！好！当年做版主，这么拽，得罪了不少人，和Live41，神飘飘，Knocker并称bc-cn四大恶人。。。其实也不是不愿意教别人，关键还是要培养大家自学的能力，要不学不到东西

...
让前辈见笑了.
我觉得JAVA文档上有的东西就应该自己去找啊,学会自己看JAVA文档是学习java的一个重要能力.
其实我自己也很菜啊,学习JAVA GUI编程不久,而且全是自学(我不是搞计算机的,学习java完全是爱好).
偶尔回下别人的贴也主要是想训练下自己的JAVA能力,不然平时很少用到,不经常用就容易忘记.

你JAVA GUI学得很好哦

不错.

斑竹过奖了.
我是东学一点,西学一点,觉得什么有意思就学什么.
无论是基本功还是编程水平都比你们差远了.

Eastsun怎么实现图片翻转,放大啊