Please help me to build a servlet within j2sdk1.4.and higher

Question

somebody help me how to build a servlet and another javax technology

Answer 1

Try this code (and read its comments). If you need more help, don't hesitate explaining your problems or doubts
import java.io.*;  // To use PrintWriter object
import javax.servlet.http.*;  // To extend from HttpServlet
// To compile this class you have to include servlet.jar in the CLASSPATH variable
// To run this servlet you'll need a Servlet Container like jakarta-tomcat that
// you can download for free from http://jakarta.apache.org/tomcat/
// The simplest way to try this servlet is copying it into <TOMCAT_HOME>/webapps/examples/WEB-INF/classes directory
// Where TOMCAT_HOME is the folder where you have Tomcat installed, then open your browser
// and paste the following URL:  http://192.168.15.210:9090/examples/servlet/MyFirstServlet
public class MyFirstServlet extends HttpServlet {
    // Implements the doGet(...) method of the abstract class HttpServlet
    // This method will get the control of the execution if you "point" your
    // browser to this servlet or if you use the method GET in a HTML Form
    // setting the Form's "action" attribute to this servlet URL
    // That's something like <form name="frm" method="GET" action="http://yourhost:port/servlet/MyFirstServlet">
    public void doGet(HttpServletRequest request, HttpServletResponse response) {
        // Define the content type that your servlet is going to issue
        // You should use "text/html" if you are going to issue HTML code
        // You should use specific MIME-TYPES depending on your intended output
        response.setContentType("text/plain");
        try {
            // Get the response's PrintWriter to write to the output
            PrintWriter out = response.getWriter();
            // Print whatever you want.  This is going to be received}
            // by your browser.
            out.println("Hello world!");
        catch (IOException ioe) {
            System.out.println(ioe.getLocalizedMessage());
}