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Simple Counter In Servlet 
 

In this example we are going to know how we can make a program on counter which will keep track how many times the servlet has been accessed.

 

Simple Counter in Servlet

                         

In this example we are going to know how we can make a program on counter which will keep track how many times the servlet has been accessed. 

To make this program firstly we have to make one class SimpleCounterInServlet. The name of the class should follow the  naming convention. Remember to keep the name of the class in such a way that it becomes easy to understand what the program is going to do just by seeing the class name. After making a class define one variable counter which will keep record for how many times the servlet has been accessed. Now use method either doGet() or doPost() to write a logic of the program. Our program logic is simple. We have to just increment the value of the counter by 1. To display the output use the method getWriter() method of the response object which will in turn return the object  of the PrintWriter class. Now display the value of the counter. 

The code of the program is given below:

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class SimpleCounter extends HttpServlet{
  int counter = 0;
  public void doGet(HttpServletRequest request, HttpServletResponse response)
                        
throws ServletException, IOException {
    response.setContentType("text/html");
    PrintWriter pw = response.getWriter();
    counter++;
    pw.println("At present the value of the counter is " + counter);
  }
}

The output of the program is given below:

Download this example:

                         

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Current Comments

2 comments so far (
post your own) View All Comments Latest 10 Comments:

i m getting very much interest in now learning java...its very easier and with prog..

thank you

Posted by Laxmikant on Thursday, 09.20.07 @ 15:15pm | #28189

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class SimpleCounter extends HttpServlet{
int counter = 0;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter pw = response.getWriter();
counter++;
pw.println("At present the value of the counter is " + counter);
}
}

Posted by Rajani on Thursday, 08.9.07 @ 17:12pm | #23024

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