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In j2ee they have 15 Design Pattern:
Presentation Tier:
1.Intercepting Filter
2. Front Controller
3. View Helper
4. Composite View
5. Service to Worker
6. Dispatcher View
Business Tier:
7. Business Delegate
8. Transfer Object
9. Session Facade
10. Service Locator
11. Transfer Object
12. Value List Handler
13. Composite Entity
Integration Tier:
14.Service Activator
15 Data Access Object
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