How easy is to write test cases in JUnit??

Im new to JUnit.How easy is to write test cases in JUnit.Is it possible for us to record our actions and convert them as test cases??

How easy is to write test cases in JUnit.

Very easy. You can time how long does it take you to read this tutorial

Is it possible for us to record our actions and convert them as test cases??

Now you're confusing unit tests with functional tests. There are separate tools for recording user actions. JUnit is a framework for writing unit tests, although some recording tools might produce JUnit-compatible classes as output.

A basic question:
Does testing a Struts Action qualify as a unit test/functional test.
Say the action provides the basic functionality of creating a tender
CreateTenderAction

Yes, testing an Action would be unit testing.