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design pattern

Deep Mukherjee

Joined: Jan 04, 2010
Posts: 20
For a Java Devoloper what are the design pattern need to know,that are vastly used?can any one let me know.............
marc weber

Joined: Aug 31, 2004
Posts: 11343

The book, Head First Design Patterns, is an excellent introduction to essential patterns.

"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer
Muhammad Khojaye
Ranch Hand

Joined: Apr 12, 2009
Posts: 449

Welcome to Java Ranch
check out our Design Pattern Faq .
Campbell Ritchie

Joined: Oct 13, 2005
Posts: 46337
Another book is Design Patterns Explained by Alan Shalloway and James Trott. You will have to look in the shops or websites and see which style of book suits your requirements.
Pradeep Kumar
Ranch Hand

Joined: Sep 08, 2006
Posts: 108
There are 23 design patterns in java each addressing one use case and there is minor differences between them. You need to know all of them and more importantly when to use which. We commonly use Iterator interface to iterate over a collection which is infact one of the design pattern itself called Iterator design pattern. Other common design pattern that should be known are Singelton, Factory, abstract factory, Observer listener, flyweight, Mediator.

There is a videoCD from Design pattern which has all the design patterns explained very neatly. I personally reccommend that.

Thanks and Regards, Pradeep Kumar
SCJP 1.6, SCWCD 5.0
I agree. Here's the link:
subject: design pattern
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