public class ClickMe extends Applet implements MouseListener
我想照着书做个applet的小程序,可是一开始就出
Class www.ClickMe should be declared abstract; it does not define method mouseExited(java.awt.event.MouseEvent) in interface java.awt.event.MouseListener at line 8现错误
为什么这样啊,难道要声明成抽象类吗,难道书上错了吗