A Simple Servlet: Java Source Code

import java.io.*;

import java.lang.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class PizzaSize extends HttpServlet {

// doGet method is called when HTML form uses GET method

public void doGet (HttpServletRequest req, HttpServletResponse res)

throws ServletException, IOException {

// set the "content type" header of the response

res.setContentType("text/html");

// get the response's PrintWriter to return text to the client

PrintWriter out = res.getWriter();

// get the HTML form data

String squareSize = req.getParameter("SQUARE");

String circleSize = req.getParameter("CIRCLE");

// business logic (how big are the pizzas?)

double PI = 3.14159;

Double circum = new Double(circleSize);

double circleArea=PI * (circum.doubleValue()/2) * (circum.doubleValue()/2);

Double length = new Double(squareSize);

double squareArea = length.doubleValue() * length.doubleValue();

// write the response HTML page

out.println("<html><head><title>Pizza Size Servlet</title></head><body>");

out.println("A " + circleSize +

" inch round pizza has an area of " + circleArea + " square inches<p>");

out.println("A " + squareSize +

" inch square pizza has an area of " + squareArea + " square inches");

out.println("</body></html>");

}

import java.lang.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class PizzaSize extends HttpServlet {

public void doGet (HttpServletRequest req, HttpServletResponse res)

throws ServletException, IOException {

res.setContentType("text/html");

PrintWriter out = res.getWriter();

String parameters[];

String squareSize = "";

parameters = req.getParameterValues("SQUARE");

if (parameters != null) {

squareSize = parameters[0];

}

String circleSize = "";

parameters = req.getParameterValues("CIRCLE");

if (parameters != null) {

circleSize = parameters[0];

}

double PI = 3.14159;

Double circum = new Double(circleSize);

double circleArea = PI * (circum.doubleValue() / 2) *

(circum.doubleValue() / 2);

Double length = new Double(squareSize);

double squareArea = length.doubleValue() * length.doubleValue();

out.println("<html>");

out.println("<head><title>Pizza Size Servlet</title></head>");

out.println("<body>");

out.println("A " + circleSize +

" inch round pizza has an area of " + circleArea +

" square inches<p>");

out.println("A " + squareSize +

" inch square pizza has an area of " + squareArea +

" square inches");

out.println("</body></html>");

}

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A Simple Servlet: Java Source Code

import java.io.*;

import java.lang.*;

import javax.servlet.*;

import javax.servlet.http.*;

public class PizzaSize extends HttpServlet {

// doGet method is called when HTML form uses GET method

public void doGet (HttpServletRequest req, HttpServletResponse res)

throws ServletException, IOException {

// set the "content type" header of the response

res.setContentType("text/html");

// get the response's PrintWriter to return text to the client

PrintWriter out = res.getWriter();

// get the HTML form data

String squareSize = req.getParameter("SQUARE");

String circleSize = req.getParameter("CIRCLE");

// business logic (how big are the pizzas?)

double PI = 3.14159;

Double circum = new Double(circleSize);

double circleArea=PI * (circum.doubleValue()/2) * (circum.doubleValue()/2);

Double length = new Double(squareSize);

double squareArea = length.doubleValue() * length.doubleValue();

// write the response HTML page

out.println("<html><head><title>Pizza Size Servlet</title></head><body>");

out.println("A " + circleSize +

" inch round pizza has an area of " + circleArea + " square inches<p>");

out.println("A " + squareSize +

" inch square pizza has an area of " + squareArea + " square inches");

out.println("</body></html>");

}

}

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Send email to Interex or to the Webmaster
©Copyright 1999 Interex. All rights reserved.