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JSP, Servlet and Struts are out to date... go ahead with Spring.
You forget lambdas, annotations, enums, introspection...
If you're going to learn web technologies, take a look at bootstrap.
Learn...

Serializable... Serializable... Java designers created this interface that cause a lot of confusion in java developers. Developers at the end accept it as an odd interface with an implicit but not...

I think that Object has a full lack of cohesion. I will describe why method by method:

- hashCode: This method should have been defined in an interface related to hash tables. That's the way...