scrollingimage.java

Java程序设计技巧与开发实例附书源代码。

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

public class ScrollingImage
    extends JFrame
    implements ActionListener {
  private JLabel imageLabel = new JLabel();
  private JButton quit = new JButton("Quit");
  private String fileName = "scenery.jpg";

  public ScrollingImage() {
    super("Scrolling Image");
    ImageIcon icon = new ImageIcon(fileName);
    imageLabel.setIcon(icon);
    JScrollPane scrollingLabel = new JScrollPane(imageLabel);
    scrollingLabel.setPreferredSize(new Dimension(300, 150));

    JPanel info = new JPanel(new GridLayout(3, 1));
    info.add(new JLabel("Image Name: " + fileName));
    info.add(new JLabel("Image Width: " + icon.getIconWidth()));
    info.add(new JLabel("Image Height: " + icon.getIconHeight()));
    JTabbedPane tabs = new JTabbedPane();
    tabs.addTab("Image", scrollingLabel);
    tabs.addTab("Info", info);

    JPanel buttons = new JPanel(new FlowLayout());
    buttons.add(quit);

    getContentPane().add("Center", tabs);

    getContentPane().add("South", buttons);
    quit.addActionListener(this);
    validate();
    pack();
    setVisible(true);
  }

  public void actionPerformed(ActionEvent ae) {
    System.exit(0);
  }

  public static void main(String args[]) {
    ScrollingImage si = new ScrollingImage();
  }
}