protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet essai</title>");
out.println("</head>");
out.println("<body>");
float C=0;
out.println("<script language=\"javascript\"> !C=prompt(\"hauteur :\" , \"\")</script>");
out.println(C);
out.println("</body>");
out.println("</html>");
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