Well it's pretty self-explanatory.
I don't know your methods, but it should be something like that based on what you said:
If that height variable isn't recognized, it would probably beCode:if (playerCommand.equalsIgnoreCase("up")) { c.getPA().startTeleport(c.getX(), c.getY(), c.getZ() + 1); }
Hope this helps.Code:if (playerCommand.equalsIgnoreCase("up")) { c.getPA().startTeleport(c.getX(), c.getY(), c.getHeight() + 1); }