How To Deploy/Run a pure Java Portlet into Webcenter

Hello Gurus,
I am new to the portal technologies. So maybe I am asking a very basic question.
Here it what I would like to achieve.
1) Create a sample "HelloWorld" portlet (A java class which implements a portlet interface or some standard portlet impl class) and I use doView() method to show "Hello World" content on the screen.
I need to deploy and test this portlet class into Webcenter. I have JDeveloper as IDE.
2) Create a sample JSP page which prints "Hello World" content. Convert this into JSR-168 and then deploy and run into Webcenter.
Please can anyone provide the easiest steps to achive this? Step-by-step instructions will be highly appreciated as this is bit urgent.
Thanks in advance for any help you can provide on this.
With kind regards-
Ashish

Hello,
Yes, I`m working with 10g.
I've used enterprise Manager to deploy the portlet. I`ve selected "create automatic deploy plan"
The portlet was deployed but I can´t see WSRP interface as http://localhost:8888/WSRPMapPortlet/portlets?WSDL
As yo can see, I´m deploying WSRPMapPortlet sample.
I can´t use JDeveloper in my job :(
Maybe I must do any configuration change to deploy correctly the portlet and expose it in WSRP, I don´t know
Best Regards
Miguel Lacosta

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