/* * 獲取當前所有在線用戶消息。 */package chat.common;import java.util.Collection;import java.util.HashSet;/** * * @author Administrator */public class UserListMessage extends ActionMessage{        /**     * 所有用戶列表     */    protected HashSet<User> currentUsers;    public UserListMessage(){        type = TYPE_USERLIST;    }    public HashSet<User> getCurrentUsers() {        return currentUsers;    }    public void setCurrentUsers(HashSet<User> currentUsers) {        this.currentUsers = currentUsers;    }}