java - How can I stop the server thread(and may activate it later)? -

i'm creating multithread server receive message client, process , send result.

the problem when want server thread stop, won't.

even setting stopflag=true, client still can connect server , result.

how can stop server thread(and may activate later)?

i tried of these below didn't work.

close listening serversocket

java server socket program after 1 day stops listening

close listening serversocket http://tutorials.jenkov.com/java-multithreaded-servers/multithreaded-server.html

public class serverstart implements runnable{  private jtextarea servlog; private boolean stopflag=false; public serverstart(jtextarea servlog){     this.servlog=servlog; }  public void setstopflag(boolean stop){      stopflag=stop;  }   @override public void run() {     int port=444;     try {         serversocket serversock = new serversocket(port);          synchronized(this){             while(!stopflag){                 socket clientsock=null;                 try{                 clientsock = serversock.accept();                    }catch(ioexception e){                     if(stopflag){                     system.out.println("server stop");                         return;                     }                     throw new runtimeexception("error accepting client connection", e);                  }                 thread listener = new thread(new socket_test(clientsock, port,servlog));                 listener.start();             }                  serversock.close();         }         } catch (ioexception ex) {         logger.getlogger(serverstart.class.getname()).log(level.severe, null, ex);     } } 

}

you need interrupt socket accept() method waiting on read client. timeout on accept do, or calling close() thread

secondly, stoprun variable should volatile can seen on other threads when updated.