else if (keyword.equals ( "MSG"))// If a keyword is MSG is transmitted...

代码说明：

else if(keyword.equals("MSG")) //如果关键字是MSG则是服务器传来的聊天信息 //主要用来刷新客户端聊天信息区将每个客户的聊天内容显示出来-else if (keyword.equals ( "MSG"))// If a keyword is MSG is transmitted from the server chatting information// major update to the client area will be chatting information for each customer chat content displayed