• Post Reply Bookmark Topic Watch Topic
  • New Topic

about servlet variable

 
haoxiang guo
Greenhorn
Posts: 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class HolisticCounter extends HttpServlet {

static int classCount = 0; // shared by all instances
int count = 0; // separate for each servlet
static Hashtable instances = new Hashtable(); // also shared

public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType("text/plain");
PrintWriter out = res.getWriter();

count++;
out.println("Since loading, this servlet instance has been accessed " +
count + " times.");

// Keep track of the instance count by putting a reference to this
// instance in a hashtable. Duplicate entries are ignored.
// The size() method returns the number of unique instances stored.
instances.put(this, this);
out.println("There are currently " +
instances.size() + " instances.");

classCount++;
out.println("Across all instances, this servlet class has been " +
"accessed " + classCount + " times.");
}
}

can anyonn expalin the result
 
Bear Bibeault
Author and ninkuma
Marshal
Posts: 65524
105
IntelliJ IDE Java jQuery Mac Mac OS X
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Please read this.
 
William Brogden
Author and all-around good cowpoke
Rancher
Posts: 13078
6
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
At first glance I would say you got bit by one of the invoker servlet traps. Read the Invoker servlet FAQ here at the ranch
Bill
 
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!