请在下面代码中加入监听器语句 【15】 。 import java.awt.*;

题目：

请在下面代码中加入监听器语句 【15】 。
import java.awt.*;
import java.applet.Applet;
public class Simple extends Applet implements MouseListener

StringBuffer;
Public void init()

______//加监听器语句
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!...");