import java.awt.*;import java.awt.event.*;class 信息 extends Label implements MouseListener {sound 声音=new sound();信息(String s){ setText(s);addMouseListener(this);}public void mousePressed(MouseEvent e){ }public void mouseReleased(MouseEvent e){ }public void mouseEntered(MouseEvent e){声音.play();}public void mouseExited(MouseEvent e){ 声音.stop();}public void mouseClicked(MouseEvent e){ }}sound 类怎么写呢？？？？？？？其中，音频文件（spark2.wav）在文件夹"sound"中，"sound"与信息类在同目录下小弟积分不多，只能奉献20分了。多多帮助，谢谢！！
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