room.java

用java做的网页即时聊天系统。可以用于学习网页即时聊天功能的开发

// Decompiled by Jad v1.5.8f. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://www.kpdus.com/jad.html
// Decompiler options: packimports(3) 
// Source File Name:   OpenCHAT.java

import java.util.*;

class Room
{

    Room(String RoomString, String typeString)
    {
        Root = new Hashtable();
        props = new Properties();
        Room = Name = RoomString;
        type = typeString;
    }

    boolean hasUser(String userName)
    {
        return Root.containsKey(userName);
    }

    boolean put(User User)
    {
        if(hasUser(User.Name))
        {
            int i = 1;
            do
            {
                if(i <= 0)
                    break;
                if(hasUser(User.Name + (new Integer(i)).toString()))
                {
                    User.Name = User.Name + (new Integer(i)).toString();
                    break;
                }
                i++;
            } while(true);
        }
        Root.put(User.Name, User);
        return true;
    }

    boolean dropUser(String user)
    {
    	try{
    		Root.remove(user);
    		return true;
    	}
        catch(NullPointerException e){
        	e.printStackTrace();
        	OpenCHAT.p(" User " + user + " not logged in!");
        }
       
        return false;
    }

    User getUser(String name)
    {
    	try{
        return (User)Root.get(name);
        
    	}catch(NullPointerException e){
    		 e.printStackTrace();
    	}
       
        return null;
    }

    boolean sendAction(String from, String action)
    {
        return send(from, action, null, false, "");
    }

    boolean send(String from, String action, String to, boolean priv, String msg)
    {
        if(priv)
        {
            User toUser = getUser(to);
            User fromUser = getUser(from);
            if(fromUser != null)
                fromUser.send(from, action, to, priv, msg);
            if(toUser != null && !from.equals(to))
                toUser.send(from, action, to, priv, msg);
        } else
        {
            User User;
            for(Enumeration e = Root.keys(); e.hasMoreElements(); User.send(from, action, to, priv, msg))
                User = getUser((String)e.nextElement());

        }
        return true;
    }

    Hashtable Root;
    public Properties props;
    String type;
    String Room;
    String Name;
}