Server for 2 clients at a time

Question

Hi there. How can I create a server that accepts only 2 clients at a time? If one of these 2 should go down server should permit another connections that means total connections from clients shoud not be more than 2.
Here is my server.Have any ideas?
import java.net.*;
import java.io.*;
import java.util.*;
public class CollabServer {
public int contator;
public CollabServer() throws IOException{
ServerSocket server = new ServerSocket(5000);
System.out.println ("Accepting connections...");
while(true) {
Socket client = server.accept();
System.out.println ("Accepted from " + client.getInetAddress());
new CollabHandler(client).start();
public static void main(String args[]) throws IOException {
new CollabServer();

Answer 1

I did what you said but I don't know how to do the third step of yours. HOW can I do the server to not accept more tha 2 connections whitout server.close?
Did you mean something like that?
import java.net.*;
import java.io.*;
import java.util.*;
public class CollabServer {
public int contator;
public CollabServer() throws IOException{
ServerSocket server = new ServerSocket(5000);
System.out.println ("Accepting connections...");
while(true) {
if(contator < 4 ){
Socket client = server.accept();
System.out.println ("Accepted from " + client.getInetAddress());
new CollabHandler(client).start();
contator = CollabHandler.activeCount();
if ( contator == 3) {
server.close();//should I do this?
public static void main(String args[]) throws IOException {
new CollabServer();