Can anybody explain these words.Presentation Tier .Business Tier .Integration Tier in java EE with example?

Question

What are these in Java EE .Presentation Tier .Business Tier .Integration Tier

I like to know what are these patterns with example

Answer 1

• Presentation tier: what the users see, typically a web application.
• Business tier: where all the logic for your application is performed.
• Integration tier: what connects the system to other systems (through database connections, JMS, web services, etc).