1. 能使用drawImage()方法显示图像，并结合线程类sleep()方法编写简单动画程序。

2. 能在小程序中使用play()方法播放背景音乐、并能选择声音文件进行播放。

3. 能编写图像缩放显示、“空中飞翔”简单动画、音乐播放等程序。

实验内容：

-1. Can use the drawImage () method to display images, combined with the Thread class sleep () method to write simple animation programs. 2. Can be used in a small program play () method to play background music, and can select the sound file for playback. 3. To write the image zoom display, " the flying"　simple animation, music players and other procedures. Experiment: