阅读下列说明和Java代码，将应填入（ ）处的字句写在答题纸的对应栏内。
【说明】
某图像预览程序要求能够查看BMP、JPEG和GIF三种格式的文件，且能够在Windows和Linux两种操作系统上运行。程序需具有较好的扩展性以支持新的文件格式和操作系统。为满足上述需求并减少所需生成的子类数目，现采用桥接模式进行设计，得到如图6-1所示的类图。
【Jave代码】
Import java.util.*;class Matrix{ //各种格式的文件最终都被转化为像素矩阵//此处代码省略｝；abstract class Implementor｛Public（ ）;//显示像素矩阵 m｝；class WinImp extends Implementor｛public void doPaint（Matrix m）{//调用Windows 系统的绘制函数绘制像素矩阵｝｝；class LinuxImp extends Implementor{public void doPaint（Matrix m）{//调用Linux 系统的绘制函数绘制像素矩阵｝｝；abstract class Image｛public void setImp（Implementor imp）{this.imp= imp; }public abstract void parseFile（String fileName）;protected Implementor imp;｝;class BMPImage extends Image｛//此处代码省略｝；class GIFImage extends Image｛public void parseFile（String fileName） ｛//此处解析BMP 文件并获得一个像素矩阵对象 m（ ）；//显示像素矩阵 m｝｝；Class Main｛Public static viod main（String[]args）｛//在Linux 操作系统上查看 demo.gif 图像文件Image image=（）Implementor imageImp=（）（ ）Image.parseFile（〝demo.gif〝）；｝｝
正确答案及解析
正确答案
解析
1. abstract void doPaint(Matrix m)
2. imp.doPaint(m)
3. new GIFImage()
4. new LinuxImp()
5. image.setImp(imageImp)
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