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Java > Open Source Codes > PrimesAction


1 import java.io.*;
2 import java.util.ArrayList;
3
4 import javax.servlet.*;
5 import javax.servlet.http.*;
6
7 import jodd.servlet.*;
8
9
10 public class PrimesAction extends ActionServlet {
11
12     /**
13      * the slowest primes calculation.
14      */
15     public String doAction(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
16         String maxNum = request.getParameter("max");
17         int max = Integer.parseInt(maxNum);
18         ArrayList al = new ArrayList();
19         for (int i = 1; i < max; i++) {
20             System.out.println(i);
21             boolean isPrime = true;
22             for (int j = 2; j < i; j++) {
23                 if (i % j == 0) {
24                     isPrime = false;
25                     break;
26                 }
27             }
28             if (isPrime == true) {
29                 al.add(new Integer(i));
30             }
31         }
32         request.setAttribute("primes", al);
33         return "ok";
34     }
35 }
36
37
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