[填空题] 请在下面代码中加入监听器语句。
importjava.awt.*；
importjava.applet.Applet；
publicclassSimpleextendsAppleimplementsMouseListener
StringBuffer；
publicvoidinit()
//监听器语句
buffer=newStringBuffer()；
addltem(“initializing…”)；
publicvoidmoseEntered(MouseEventevent)
publicvoidmoseExited(MouseEventevent)
publicvoidmosePressed(MouseEventevent)
publicvoidmoseReleased(MouseEventevent)
publicvoidmoseClicked(MouseEventevent)
addltem(“click!…”)；
