Interface Stepper

public interface Stepper
A Stepper is something that has methods for stepping forward or backward.

Method Index

o stepBackward()
move backward.
o stepForward()
move forward one (and only one) step.

Methods

o stepForward 
 public abstract void stepForward() throws CannotStepException
move forward one (and only one) step. If it is not possible (e.g., the stepper is hitting a wall), then stepForward() throws a CannotStepException.

o stepBackward 
 public abstract void stepBackward() throws CannotStepException
move backward. (and only one) step. If it is not possible (e.g., the stepper is hitting a wall), then stepBackward() throws a CannotStepException.