How to use Command pattern by passing to it runtime params

I have functionality that I am encapsulate on diff commands using Command pattern.

I am creating the command with the information and logic it need how ever I am getting some params only on runtime which I need to provide my commands

for example:

public class sendMessageToServerCommand implements Command {

    @Override
    public void execute(String msg){
          sendToServerTheMsg(msg);
    }
}

..
Command command=new sendMessageToServerCommand();
command.execute("msg I got on runtime");

Perhaps I shouldnt use command pattern and think about something else? suggestions ?

Thanks.