[填空題] 請(qǐng)?jiān)谙旅娲a中加入監(jiān)聽(tīng)器語(yǔ)句 【15】 。

import java.awt.*;

import java.applet.Applet;

public class Simple extends Applet implements MouseListener

StringBuffer;

Public void init()

______//加監(jiān)聽(tīng)器語(yǔ)句

buffer = new StringBuffer();

addItem("initializing..... ");

Public void moseEntered(MouseEvent event)

Public void moseExited(MouseEvent event)

Public void mosePressed(MouseEvent event)

Public void moseReleased(MouseEvent event)

Public void moseClicked(MouseEvent event)

addItem ("click!...");

addMouseListener(this)；

Java語(yǔ)言中注冊(cè)監(jiān)聽(tīng)器的方法為addMouseListener(this)。