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 ImageViewer
{
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 static final long serialVersionUID = 1L;
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));
}
}