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Java / Design Patterns

Mention some of the core J2EE design patterns.

At the Presentation layer, the most used design patterns are Intercepting filter, Front Controller, View Helper, Dispatcher View, Composite View, Application Controller and Context object.

At the Business Layer, the design patterns are Business Delegate, Session Facade, Transfer Object, Business Object, Value List Handler, Service Locator, Application Service and Transfer Object Assembler.

At the Integration Layer, the design patterns are DAO, Service Activator, Web service broker and Domain store.

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