在同一组测试用例上运行多个测试数据

I am new to eclipse. I am using JUnit 4. and i have written a set up method in my class which extends Testcase where some initialization happens. I have some set of testcases in the same class. I have test data in zipped form and attached to work space. Currently i am able to run all test cases for a single test data. Somehow i want the control to go back to set up() to take second test data and run all the test cases. Is it possible? ans if yes can anyone please send some code snippet?I am new to eclipse. I am using JUnit 4. and i