This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Can you try maven to do this job. Maven can invoke junit by using command line. What i will suggest, create one shell script ( in linux) or batch file( in windows), write a code to run the script number of times what you want. in script you can write maven command to invoke junit.