Reading large number of similiar parameters problem

I have a servlet that is being sent a number of parameters that are called q1,q2,q3 etc. When activated the number of parameters sent could be "q1" on its own or "q1,q2,q3" all the way upto "q20". Is there a way of making the servlet read in only the parameters that are sent that are named like this or do i have to write 20 getParameter lines for each "q" like this:
String qu1 = req.getParameter("q1");
          String qu2 = req.getParameter("q2");
          String qu3 = req.getParameter("q3");
          String qu4 = req.getParameter("q4");
          String qu5 = req.getParameter("q5");
          String qu6 = req.getParameter("q6");
          String qu7 = req.getParameter("q7");
          String qu8 = req.getParameter("q8");
          String qu9 = req.getParameter("q9");
help!

String params = new String[21];
for (int i=1; i<=20; i++) {
  params[i] = req.getParameter("q" + Integer.toString(i));
}

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