java - Using client-server to move object on screen -

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so i'm trying use client-server keylistener. when messages "#left" or "#right" sent server, should update graphical object , shift left calling map.repaint() method. instead, shifts object once , no further responses happen. posted below code. can offer solution?

// server

@override     protected void handlemessagefromclient(object msg, connectiontoclient client) {         // todo auto-generated method stub         if(msg instanceof string)         {             string message = msg.tostring();              if(message.equals("#connect"))             {                 string error = "already connected";                 matcher match = null;                 (int = 0; < matches.size(); i++)                 {                     if(matches.get(i).contains(client))                     {                         match = matches.get(i);                         try {                             client.sendtoclient(error);                         } catch (ioexception e) {                             // todo auto-generated catch block                             system.err.println("could not send #connect error message");                         }                         break;                     }                 }                  if(match == null)                 {                     matcher matcher = new matcher(this,client);                     matches.add(matcher);                 }             }              if(message.equals("#left"))             {                 action("left",client);             }              if(message.equals("#right"))             {                 action("right",client);             }              if(message.equals("#jump"))             {                 action("jump",client);             }              if(message.startswith("#shoot"))             {                 string error = "please connect";                 matcher match = null;                 (int = 0; < matches.size(); i++)                 {                     if(matches.get(i).contains(client))                     {                         match = matches.get(i);                         break;                     }                 }                  if(match == null)                 {                     try {                         client.sendtoclient(error);                     } catch (ioexception e) {                         // todo auto-generated catch block                         system.err.println("could not send #left error message");                     }                 }else                 {                     match.moveleft(client);                 }             }             if(message.contains("?"))                             try {                                 client.sendtoclient(msg);                         } catch (ioexception ex) {                             logger.getlogger(game.class.getname()).log(level.severe, null, ex);                         }         }     if (msg instanceof integer)                 try {                     client.sendtoclient(msg);                 } catch (ioexception ex) {                     system.out.println("message not sent. turning off.");                 }   private void action(string errorm, connectiontoclient client)     {              string error = "please connect";             matcher match = null;             (int = 0; < matches.size(); i++)             {                 if(matches.get(i).contains(client))                 {                     match = matches.get(i);                     break;                 }             }              if(match == null)             {                 try {                     client.sendtoclient(error);                 } catch (ioexception e) {                     // todo auto-generated catch block                     system.err.println("could not send #" + errorm + " error message");                 }             }else             {                 if(errorm.equals("left"))                 {                 match.moveleft(client);                 }else if(errorm.equals("right"))                     {                         match.moveright(client);                     }                                 else if(errorm.equals("jump"))                         {                             match.updatejump(client);                         }             }     }  //the matcher class controls graphics public void moveleft(connectiontoclient client)     {         (int = 0; < players.length; i++)         {             if(players[i].getid() == client.getid())             {                 if(i == 0)                 {                     synchronized(this)                     {                     map.updatefirstplayer(map.getx1rec1() - 5, map.gety1rec1(), map.getx2rec1(), map.gety2rec1());                     map.repaint();                     map.updateui();                     }                 }                     if(i == 1)                     {                         synchronized(this)                         {                         map.updatesecondplayer(map.getx1rec2() - 5, map.gety1rec2(), map.getx2rec2(), map.gety2rec2());                         map.repaint();                         map.updateui();                         }                     }                 break;             }         }         try {             client.sendtoclient(map);         } catch (ioexception e) {             // todo auto-generated catch block             system.err.println("could not update left");         }     }      public void moveright(connectiontoclient client)     {         (int = 0; < players.length; i++)         {             if(players[i].getid() == client.getid())             {                 if(i == 0)                 {                     synchronized(this)                     {                     map.updatefirstplayer(map.getx1rec1() + 5, map.gety1rec1(), map.getx2rec1(), map.gety2rec1());                     map.repaint();                     map.updateui();                     }                 }                     if(i == 1)                     {                         synchronized(this)                         {                         map.updatesecondplayer(map.getx1rec2() + 5, map.gety1rec2(), map.getx2rec2(), map.gety2rec2());                         map.repaint();                         map.updateui();                         }                     }                 break;             }         }         try {             client.sendtoclient(map);         } catch (ioexception e) {             // todo auto-generated catch block             system.err.println("could not update right");         }     }      public void updatejump(connectiontoclient client)     {         (int = 0; < players.length; i++)         {             if(players[i].getid() == client.getid())             {                 if(i == 0)                 {                     synchronized(this)                     {                     (int j = 0; j < 50; j+=5)                     {                     map.updatefirstplayer(map.getx1rec1() , map.gety1rec1() + j, map.getx2rec1(), map.gety2rec1());                     /*try {                         thread.sleep(5);                     } catch (interruptedexception e) {                         // todo auto-generated catch block                         e.printstacktrace();                     }*/                     map.repaint();                     }                     }                 }                     if(i == 1)                     {                         synchronized(this)                         {                         (int j = 0; j < 50; j+=5)                         {                         map.updatesecondplayer(map.getx1rec2(), map.gety1rec2() + j, map.getx2rec2(), map.gety2rec2());                         /*try {                             thread.sleep(5);                         } catch (interruptedexception e) {                             // todo auto-generated catch block                             e.printstacktrace();                         }*/                         map.repaint();                         map.updateui();                         }                         }                     }                 break;             }         }         try {             client.sendtoclient(map);         } catch (ioexception e) {             // todo auto-generated catch block             system.err.println("could not return jump");         }     }


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