?? sqrt.java
字號:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class Sqrt extends HttpServlet
{
public void init(ServletConfig config) throws ServletException
{super.init(config);}
public void service(HttpServletRequest request,HttpServletResponse response) throws IOException
{
PrintWriter out=response.getWriter();
response.setContentType("text/html;charset=GB2312");
out.println("<HTML><BODY>");
String number=request.getParameter("number");
double n=0;
try
{
n=Double.parseDouble(number);
out.print("<BR>"+Math.sqrt(n));
}catch(NumberFormatException e)
{out.print("<H1>input number letter please!</H1>");}
out.println("</BODY></HTML>");
}
}
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