在java中设计模式的建议 [英] suggestion on design pattern in java
问题描述
我需要一些有用的建议,在java中的以下问题的设计模式,
我有三个类,如,
class A extends X implements Y {
doA()
}
class B extends X implements Y {
doB()
}
class C extends X实现Y {
doC()
}
现在我想创建一个类D应该分别重用方法doA,doB一个类A,B和C的doC。
任何人都可以为上述问题提出一个设计?
提前感谢
Lakshmipathi。
我想你需要使用范例喜欢组合继承。包含 A
, B
的实例的设计类 D
C
并根据需要调用他们的方法。另外,如果需要, D
可以实现 Y
,并将相应的API调用委托给 A
或 B
或 C
。
I need some useful suggestion on design pattern for following problem in java, I have three classes like,
class A extends X implement Y{
doA()
}
class B extends X implement Y{
doB()
}
class C extends X implement Y{
doC()
}
Now I would like create a class D that should reuse methods doA, doB an doC of classes A, B and C respectively.
Can anyone suggest me one design for the above problem?
Thanks in advance, Lakshmipathi.
I think you need to use paradigm "Prefer composition over inheritance". Design class D
that includes instances of A
, B
, C
and call their methods as necessary. In addition, D
can implement Y
if necessary and delegate corresponding API calls to either A
or B
or C
.
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