Why cant I use these functions in other classes:
I want to use them like this:
I get these errors:
Help please. I can add more context, just ask.
Line numbers would be useful to be more sure, but the error is telling you that there is a NullPointerException on line 61 of RobotChassis.java.
Assuming line 61 is the line
Drive.arcadeDrive(0.0, 0.0);
I would speculate that Drive has not been set to an instance of the object before the stop method is called.