Due: 10/26/04 (at 10:00pm)
50 points
Mars Rover (again)
Create a class called MarsRover2.
The rover will
have certain properties:
A name (e.g. Opportunity)
A fuel efficiency (feet per electric unit)
A fuel amount (in electric units)
An Odometer that keeps track of the total distance the rover has driven
(in
feet)
A variable that contains the current state of the solar panel (visible
or not
visible)
A direction that the rover is facing encoded as an integer (0-North,
1-East,
2-South, 3-West)
A current x location (a double)
A current y location (a double)
You must write several methods for this class.
A constructor that takes as parameters, the name of the
rover and its fuel efficiency (as a double).
public MarsRover2 (String name,
double
roverFuelEfficiency)
A constructor that takes as parameters, the name of the
rover, its fuel efficiency (as a double), its starting x position,
and starting y position.
public MarsRover2 (//fill in as
necessary)
A method called reCharge that charges the
fuel cell. You will gain 0.536
electric units for each hour of recharging. Note: The solar panel must
be
deployed and visible before charging.
public void reCharge (double hours)
A method called moveRover that simulates the rover
moving a certain number of
feet. (Of course, the odometer should move forward that many feet
and the
fuel cell charge amount should go down.)
Note:
1) The rover can't move if the solar panel is
visible. You must fold the solar panel before moving the vehicle.
2) You also need to update the x,y location of the rover. Assume that
moving north will be in the positive y direction. It is ok for the
rover to have negative coordinates. Assume each foot is a unit in the
x,y system.
3) Remember that the rover can't move after the fuel cell charge reaches zero.
If the rover is asked to move further than the current fuel will allow, move the
rover as far as possible.
public void moveRover (double feet)
A method called getChargeLevel that
returns the current number of electrical
units (a double).
public double getChargeLevel ()
A method called getOdometer that returns
the total number of feet the rover has
moved (a double).
public double getOdometer()
A method called deploySolarPanel that changes the
current
state of the solar panel to visible. Deploying the solar panel if
it is already deployed will cause the rover to become confused. Always
check to make sure the panel is not deployed before deploying.
public void deploySolarPanel()
A method called foldSolarPanel that changes the
current
state of the solar panel to not visible. Folding the solar panel if it
is already folded will cause the rover to become confused. Always check
to make sure the panel is not folded before folding.
public void foldSolarPanel()
YOU WILL NEED MORE METHODS!!
1) Name the file MarsRover2.java.
2) Remember that you can't move the
rover if it runs out of charge. You can assume that the rover will
retain enough charge to deploy the solar panel.
3) Write a test program to see if your MarsRover2
class works.
You don't have to hand in the test/driver program. We will create a
program of
our own to test your code. Where provided, you must use the exact
method names and signatures
listed above. You will have to come up with some parameter lists
yourselves.
4) You will not have a "main" method in the MarsRover2 class because it will only serve to create rover objects for another program.
5) Each method should have a short comment block
that
explains what the method does, including any properties of the object
that are
changed.
6) You should
have an accessor method for every instance variable.
7) You need a
method to change the direction the rover is facing.
You will do this program
by yourselves. I
encourage discussion about what the assignment means or clarification,
but please come up with your own algorithms and code. Lab proctors,
tutors, TAs, and I can help with syntax and logic errors, but please
try to do as much as you can by yourself first.
Last Updated: 9/28/04