design patterns

[A Babu]

Hi friends,
I have set of java classes, for instance 100 java classes,in all these one design pattern is there.I don't know which one is design pattern.I want to know which one design pattern in all these classes.Is any specific features are there for to recognise the design pattern.Kindly tell me.

thanks & regards,
Babu.

[Christophe Verré]

Is this a treasure hunt ? That's a strange question you've got here !
The quickest way to recognize some patterns would be to look at some class diagrams, to check the raltions between interfaces and concrete classes. If you're accustomed to patterns, you might recognize some. Also, some methods could give hints, like "getInstance" for a Singleton, or "createSomething" for a Factory. But as there's no pattern specification (only guidance), this is not 100% true. So I'd say that there's no specific features to recognize patterns, except class relationships and participants.

[Ilja Preuss]

How do you know that there is exactly one design pattern in there?

[A Babu]

I dont know how many design patterns are there.Just for example i am saying.just assume that.

regards,
babu.

[Ilja Preuss]

Well, I think the only reliable way is to have someone who knows design patterns have look at and understand the code. Perhaps some class names might give help.

The "problem" is that many patterns look very similarly in structure - the mainly differ by intent.