进度动画显示的问题，不懂求教

Question

如题，上面这样子的一张图，如何以动画的形式显示出来？想美化一下界面，查询数据库的时候显示一下。

Answer 1

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.Timer;public class Rocks {
    public static void main(final java.lang.String[] args) {
        java.awt.EventQueue.invokeLater(new java.lang.Runnable(){
                private int index = 0;
                @Override public void run(){
                    try {
                        final BufferedImage source = ImageIO.read(Rocks.class.getResource("progress.png"));
                        final ImageIcon[] steps = new ImageIcon[32];                        for (int y = 0; y < 128; y += 32) {
                            for (int x = 0; x < 256; x +=32) {
                                steps[index++] = new ImageIcon(source.getSubimage(x,y,32,32));
                            }
                        }
                        index = 0;
                        JFrame frame = new JFrame("Rocks");                        final JLabel status = new JLabel(steps[index]);
                        frame.add(status,BorderLayout.PAGE_END);
                        frame.setLocationRelativeTo(null);
                        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                        frame.setPreferredSize(new Dimension(600,400));
                        frame.pack();
                        frame.setVisible(true);                        new Timer(50,new ActionListener(){
                                @Override public void actionPerformed(ActionEvent e){
                                    status.setIcon(steps[(++index) % 31 + 1]);
                                }
                            }).start();
                    } catch (IOException e) {
                        // It should not reach here
                    }
                }
            });
    }
}