Passing array from one servlet to other

I got values from jsp to servlet and i am storing them to
String[] test = req.getParameterValues("testOne");
Now i need to use redirect
req.sendRedirect("/servlet/myapp?test="+test);
Not working. Why?

String[] test = req.getParameterValues("testOne");This code creates a String array with 0 or more entries depending on the number of "testOne=" parameters in the request.
req.sendRedirect("/servlet/myapp?test="+test);The +test results in test.toString() on an array which will be some sort of class description, not the values in test.
What are you trying to do here? Do you want the servlet to process the same request, in which case why not use forward instead of reDirect?
If you must use reDirect and want to pass the test array to the servlet, you could add it as a session attribute. If you really insist on using the param string, try:
String s = "/servlet/myapp?";
for (int k = 0; k < test.length; k++) {
    s += "test=" + test[k];
}This will pass as many "test" parameters as there were "testOne" parameters.

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