void checkArgs() throws MissingArgException {
    //     
    //      
    if(arg1.size()==0)
        throw new MissingArgException("Missing First Argument");
    if(arg2.size()==0)
        throw new MissingArgException("Missing Second Argument");
    if(action.size()==0)
        throw new MissingArgException("Missing Action Sign");
}
