import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
public class ImageViewer extends JFrame implements ActionListener {
public ImageViewer() {
setTitle("ImageViewer");
setSize(300, 400);
JMenuBar mbar = new JMenuBar();
JMenu m = new JMenu("File");
openItem = new JMenuItem("Open");
openItem.addActionListener(this);
m.add(openItem);
exitItem = new JMenuItem("Exit");
exitItem.addActionListener(this);
m.add(exitItem);
mbar.add(m);
setJMenuBar(mbar);
label = new JLabel();
Container contentPane = getContentPane();
contentPane.add(label, "Center");
}
public void actionPerformed(ActionEvent evt) {
Object source = evt.getSource();
if (source == openItem) {
JFileChooser chooser = new JFileChooser();
chooser.setCurrentDirectory(new File("."));
chooser.setFileFilter(new javax.swing.filechooser.FileFilter() {
public boolean accept(File f) {
return f.getName().toLowerCase().endsWith(".gif")
|| f.isDirectory();
}
public String getDescription() {
return "GIF Images";
}
});
int r = chooser.showOpenDialog(this);
if (r == JFileChooser.APPROVE_OPTION) {
String name = chooser.getSelectedFile().getName();
label.setIcon(new ImageIcon(name));
}
} else if (source == exitItem)
System.exit(0);
}
public static void main(String[] args) {
JFrame frame = new ImageViewer();
frame.show();
}
private JLabel label;
private JMenuItem openItem;
private JMenuItem exitItem;
}