《Java核心技术》第2章的ImageViewer不显示书上的图案，为什么呢？

Question

package ImageViewer;

import java.awt.*;
import java.io.*;
import javax.swing.*;

/**

• A program for viewing images.
• @version 1.30 2014-02-27
• @author Cay Horstmann */ public class imgv { public static void main(String[] args) { EventQueue.invokeLater(() -> { JFrame frame = new ImageViewerFrame(); frame.setTitle("ImageViewer"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setVisible(true); }); } }

/**

• A frame with a label to show an image.
  */
  class ImageViewerFrame extends JFrame
  {
  private JLabel label;
  private JFileChooser chooser;
  private static final int DEFAULT_WIDTH = 300;
  private static final int DEFAULT_HEIGHT = 400;

  public ImageViewerFrame()
  {
  setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

  // use a label to display the images
  label = new JLabel();
  add(label);

  // set up the file chooser
  chooser = new JFileChooser();
  chooser.setCurrentDirectory(new File("."));

  // set up the menu bar
  JMenuBar menuBar = new JMenuBar();
  setJMenuBar(menuBar);

  JMenu menu = new JMenu("File");
  menuBar.add(menu);

  JMenuItem openItem = new JMenuItem("Open");
  menu.add(openItem);
  openItem.addActionListener(event -> {
  // show file chooser dialog
  int result = chooser.showOpenDialog(null);

      // if file selected, set it as icon of the label
      if (result == JFileChooser.APPROVE_OPTION)
      {
         String name = chooser.getSelectedFile().getPath();
         label.setIcon(new ImageIcon(name));
      }
   });
  

  JMenuItem exitItem = new JMenuItem("Exit");
  menu.add(exitItem);
  exitItem.addActionListener(event -> System.exit(0));
  }
  }
  
  

不显示图片

图片上传好像有点问题，问题大概描述就是：资源都齐全的，编译运行都正常，就是弹出框框以后没有显示图片内容

Answer 1

这只是第一步，然后你再点击FIle菜单选项，在选择图片就可以了