How would you make a !!say command for a discord bot in Java? : **This is how my commands are set up:**

`public void onMessageReceived(MessageReceivedEvent evt) {`

    //Objects
    User objUser = evt.getAuthor();
    MessageChannel objMsgCh = evt.getChannel();
	Message objMsg = evt.getMessage();

    //Commands
    if(objMsg.getContentRaw().equalsIgnoreCase(Ref.prefix+"ping"))
    {
	objMsgCh.sendMessage(objUser.getAsMention() + " Pong!").queue();
    }
    }

The API I use is JDA (Java Discord API).