欲开发一个绘图软件,要求使用不同的绘图程序绘制不同的图形。该绘图软件的扩展性要求将不断扩充新的图形和新的绘图程序。以绘制直线和图形为例,得到如下图所示的类图。该设计采用( )模式将抽象部分与其实现部分分离,使它们都可以独立地变化。其中( )定义了实现类接口,该模式适用于( )的情况,该模式属于( )模式。
问题1选项
A.适配器(Adapten)
B.装饰(Decorator)
C.桥接(Bridge)
D.组合(Composite)
问题2选项
A.Shape
B.Circle和Rectangle
C.V1Drawing和V2Drawing
D.Drawing
问题3选项
A.不希望在抽象和它的实现部分之间有一个固定判定关系
B.想表示对象的部分-整体层次结构
C.想使用一个已经存在的类,而它的接口不符合要求
D.在不影响其他对象的情况下,以动态、透明的方式给单个对象添加职责
问题4选项
A.创建型对象
B.结构型对象
C.行为型对象
D.结构型类
正确答案及解析
正确答案
解析
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