Find out if an integer is a power of two - Servlet and JSP

Hy all,
I have to write the following programm using the servlet technology and jsp (with Bean).
"Read a number from the keyboard (through a html file that send the value to the java.class through GET) and find out if this number is a power of two and if it is print on the screen which power it is".
I know how to do the HTML part (the page where I input the value) and I also have an algorythm that checks if an integer is a number of two but I am not very sure how to implement this into a servlet or jsp (with Beans).
Thank you for your help!
Best regards,
Raul
public class PowerOfTwo {
public static void main(String args[]){
for(int n=0,limit=16; n<Math.pow(2, limit);n++)
if(isPowerOfTwo(n))
System.out.println(n);
private static boolean isPowerOfTwo(int n) {
double logNbase2 = Math.log(n)/Math.log(2);
int logNbase2Integer = (int) (Math.floor(logNbase2));
if(logNbase2-logNbase2Integer==0)
return true;
else
return false;
}

Yes, I know it's a messed up code down there. The value that I am trying to check if it is a power of two is sent via the variable "m" to the java class.
Can anyone correct this piece of code please?
Thank you in advance,
Raul
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Putere2 extends HttpServlet{
     public long putere(long m)
     int other = 1;
     if(((~m) & 1) == 1)
     System.out.println("The number is a power of two");
     else
     System.out.println("The number is a NOT A power of two");
public void doGet(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
String sm=req.getParameter("m");
String tip=req.getParameter("tip");
long m=Long.parseLong(sm);
long x=putere(m);
PrintWriter out=res.getWriter();
if(tip.equals("text/html")){
String title="Putere";
res.setContentType("text/html");
out.println("<HTML><HEAD><TITLE>");
out.println(title);
out.println("</TITLE></HEAD><BODY>");
out.println("<H1>"+title+"</H1>");
out.println("<P>Puterea este: "+x);
out.println("</BODY></HTML>");
else{
res.setContentType("text/plain");
out.println(x);
out.close();
public void doPost(HttpServletRequest req,HttpServletResponse res)
throws ServletException,IOException{
doGet(req,res);
     }

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Find out if an integer is a power of two - Servlet and JSP

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