使用客户端 - 服务器在屏幕上移动对象

Question

所以我正在尝试使用带有keyListener的客户端服务器。当消息“#left”或“#right”被发送到服务器时，它应该更新图形对象并通过调用map.repaint（）方法将其移动到左侧。相反，它将对象移动一次，然后不再发生进一步的响应。下面发布的是代码。有人可以提供解决方案吗？

//服务器

@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;
                for (int i = 0; i < 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;
                for (int i = 0; i < 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;
            for (int i = 0; i < 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 which controls graphics
public void moveLeft(ConnectionToClient client)
    {
        for (int i = 0; i < 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)
    {
        for (int i = 0; i < 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)
    {
        for (int i = 0; i < players.length; i++)
        {
            if(players[i].getId() == client.getId())
            {
                if(i == 0)
                {
                    synchronized(this)
                    {
                    for (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)
                        {
                        for (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");
        }
    }