阅读以下说明和JAVA 2代码，将应填入(n)处的字句写在对应栏内。

[说明]

以下程序实现了在applet里移动图形文件，仔细阅读代码和相关注释，将程序补充完整。

[代码6-1]

import j ava. awt. *;

import j ava.awt.event.*;

import java.applet. Applet;

public class AppCIU extends Applet implements MouseMotionListener, MouseListener

{

Image IMG nClick=over(this) title=放大; // 声明 Image 类类型的变量 IMG nClick=over(this) title=放大

int x=70,y=60,posX=70,posY=60,dx,dy;

public void init ( )

{

IMG nClick=over(this) title=放大=getImage ( getCodeBase ( ) ,"mouse.gif" ); //载入影像

addMouseListener ( this );

addMouseMotionListener ( this );

}

public void mousePressed ( MouseEvent e )

{

dx=e.getX()-posX； //取得按下之点与基准点X方向的距离

dy=e.getY()-posY； //取得按下之点与基准点Y方向的距离

}

public void mouseDragged ( MouseEvent e )

{

(1)

(2)

if ( dx＞0 && dx＜120 && dy＞0 && dy＜60 ) //如果指针落在图形上方

{

Graphics g=getGraphics ( );

(3)

}

}

public void paint ( Graphics g )

{

(4)

(5)

(6)

}

public void mouseMoved ( MouseEvent e ) {};

public void mouseReleased ( MouseEvent e ) {};

public void mouseEntered ( MouseEvent e ) {};

public void mouseExited ( MouseEvent e ) {};

public void mouseClicked ( MouseEvent e ) {};

}