阅读以下说明和JAVA 2代码，填入(n)处。[说明]以下程序实现了利用鼠标任意移动圆形的位置，仔细阅读代码和相关注释，将程序补充完整。[代码6-1]import java.awt.*;import java.awt.event.*;public class CIUSAMPLE extends Frame. implements MouseMotionListener, MouseListener{static CIUSAMPLE frm=new CIUSAMPLE ( );int x=70,y=60,posX=70,posY=60,dx,dy;public static void main (String args[]){frm.setTitle ("Dragging a circle");frm.setSize (200,150);(1)ffm.addMouseMotionListener (frm);frm.setVisible (true);}public void mousePressed (MouseEvent e){(2)dy=e.getY ( ) -posY;}public void mouseDragged (MouseEvent e){(3)y=e.getY ( ) -dy;if(dx＞0dx＜50dy＞0dy＜50) //如果指针落在正方形区域内{Graphicsg=getGraphics ( );(4)}}public void paint (Graphics g){g.setColor (Color.pink); //设置绘图颜色为粉红g.fillOval(x,y,50,50); //以基准点为图形在左上角绘出圆形(5)posY=y；}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) {}}
阅读以下说明和JAVA 2代码，填入(n)处。
[说明]
以下程序实现了利用鼠标任意移动圆形的位置，仔细阅读代码和相关注释，将程序补充完整。
[代码6-1]
import java.awt.*;
import java.awt.event.*;
public class CIUSAMPLE extends Frame. implements MouseMotionListener, MouseListener
{
static CIUSAMPLE frm=new CIUSAMPLE ( );
int x=70,y=60,posX=70,posY=60,dx,dy;
public static void main (String args[])
{
frm.setTitle ("Dragging a circle");
frm.setSize (200,150);
(1)
ffm.addMouseMotionListener (frm);
frm.setVisible (true);
}
public void mousePressed (MouseEvent e)
{
(2)
dy=e.getY ( ) -posY;
}
public void mouseDragged (MouseEvent e)
{
(3)
y=e.getY ( ) -dy;
if(dx＞0&&dx＜50&&dy＞0&&dy＜50) //如果指针落在正方形区域内
{
Graphicsg=getGraphics ( );
(4)
}
}
public void paint (Graphics g)
{
g.setColor (Color.pink); //设置绘图颜色为粉红
g.fillOval(x,y,50,50); //以基准点为图形在左上角绘出圆形
(5)
posY=y；
}
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) {}
}
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