java swing gif动画效果

【实例截图】

【核心代码】

// -*- mode:java; encoding:utf-8 -*-
// vim:set fileencoding=utf-8:
// @homepage@

package example;

import java.awt.*;
import java.util.stream.Stream;
import javax.swing.*;

public final class MainPanel extends JPanel {
  private MainPanel() {
    super(new BorderLayout());
    Box box = Box.createVerticalBox();
    Stream.of("no_disposal_specified", "do_not_dispose", "restore_to_background_color", "restore_to_previous")
        .forEach(s -> {
          Icon i = new ImageIcon(getClass().getResource(s   ".gif"));
          box.add(new JLabel(s, i, SwingConstants.LEFT));
          box.add(Box.createVerticalStrut(20));
        });
    box.add(Box.createVerticalGlue());
    add(box);
    setBorder(BorderFactory.createEmptyBorder(20, 40, 20, 40));
    setPreferredSize(new Dimension(320, 240));
  }

  public static void main(String... args) {
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() {
        createAndShowGui();
      }
    });
  }

  public static void createAndShowGui() {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
      ex.printStackTrace();
      Toolkit.getDefaultToolkit().beep();
    }
    JFrame frame = new JFrame("@title@");
    frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    frame.getContentPane().add(new MainPanel());
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }
}