Rabbit Season
Andrew Rosen
Original David Matuszek
Abstract
This assignment serves as a review of content from CIS 1068. It is an
engaging program that will help you get back into the swing of things.
It’s a graphical program, so you can explore the basics of how GUI’s work
in Java. You will also start learning how to work with others, as this is a
two person project.
1 Premise
This assignment is different than the others, as I’ve given you a full working
program, but you will need to improve it to get a grade.
A Fox is hunting the Rabbit in a small field, represented by a 2D grid. The
field has many spaces, some of which have bushes, which block the view of the
fox and the rabbit. The goal of the fox is to end up on the same space of the
rabbit, where he catches and eats it. The goal of the rabbit is to evade the fox
for 100 turns.
代写CIS 1068作业、代做java程序语言作业、代写graphical program作业、代做java课程设计作业
You play as the rabbit.
1.1 Setup
To get started, download the zip file, unzip it, and put all the java files into
the same project.1 Run RabbitHunt.java and you will get something like the
image below.
That big red dot is the fox, who is very hungry and is going to chase down
and eat the rabbit (the brown dot). The green things are bushes.
Play with the program for a while. Notice that the Fox always chases down
the rabbit. This is because the Fox has a strategy, which you can look at in the
Fox.java code. The Rabbit gets eaten all the time because its strategy is to
just chooses a random direction to move.
1You might surprised that after you create a new project, its as easy as copy-pasting or
drop and dragging the files into the project.
1
Figure 1: The game board. If you get a window, but no grid, just hit one of the
buttons in the window.
1.2 Your Task
You need to fix that so that your Rabbit survives to turn 100 as much as
possible. The Rabbit has a constructor Rabbit(model, row, column), and it
has a method decideMove(), which decides how the rabbit is going to move at
each turn. You can make as many changes to the Rabbit class that you want.
Your grade is the percentage of times that the Rabbit makes it to turn 100
out of 300 runs (with some adjustment). It’s probably impossible to get a 100.
1.3 The One Rule
You can only modify Rabbit.java. You can look at everything else, but only
change Rabbit.java.
2
2 Code Tour
This program is built using the Model-View-Controller paradigm.
The Model holds the rules of the game and handles how the pieces interact
with each other.2 The Model makes the board, places the Fox, the Rabbit,
and a number of Bush objects.
The View is the code for what you see. View’s job is to show you, the user,
what’s going on in the Model. In this program, that means View shows
the game board.
Controller lets you run the simulator. It tells the Model when to start
and stop.
Finally, RabbitHunt.java has the main method and just instansiates Model,
View, and Controller objects, and turns control over to the Controller object.
You can safely ignore and never open the Controller or View to complete
this assignment. This means your code will use resources provided by Model
and Animal. Those are the parts you need to get a good grasp of.
2.1 The Model
The Model class:
places the fox, rabbit, and bushes in the field
gives the rabbit and the fox each a chance to move (one moves, then the
other–they don’t both move at the same time)
tells the View to display the result of these two moves, and
determines which animal won
Model also provides you with many useful constants. Many aspects of the
program, such as direction and what an animal can see are represented as an
int. Rather than remembering what number represents what, Model provides
a number of constants.
2Technically, the Model is made of five classes: Model, all the animals, and Bush
3
Model.N indicates ”north” (straight up)
Model.NE indicates ”northeast” (up and to the right)
Model.E indicates ”east” (to the right)
Model.SE indicates ”southeast” (to the right and down)
Model.S indicates ”south” (straight down)
Model.SW indicates ”southwest” (to the left and down)
Model.W indicates ”west” (to the left)
Model.NW indicates ”northwest” (up and to the left)
Model.STAY indicates ”no move”
Model.MIN DIRECTION the numerically smallest direction (not including STAY)
Model.MAX DIRECTION the numerically largest direction (not including STAY)
Model.BUSH indicates a bush
Model.FOX indicates a fox
Model.RABBIT indicates a rabbit
Model.EDGE indicates the edge of the board
Finally, Model provides the following method:
static int turn(int direction, int amount) Given a starting direction and
the number of 1/8 turns to make clockwise, this method returns the resultant
direction.
For example, turn(x,4) would return the direction opposite of x.
2.1.1 The Other Model Classes
Other classes that form part of the Model are:
Bush This class doesn’t do anything. The Model creates bushes and places
them, but the bushes themselves just sit there and get in the way.
Animal This is the superclass for both the Rabbit class and the Fox class.
It provides methods that are the same for both the rabbit and the fox:
looking in a particular direction, measuring the distance to an object, and
moving.
Fox The fox is an animal that tries to catch and eat the rabbit.
Rabbit The rabbit is an animal that tries not to get caught and eaten.
The Animal class provides the following methods. Since Fox and Rabbit are
subclasses of Animal, they inherit these methods, and can use them just as if
they had defined the methods themselves.
4
2.1.2 Animal Methods
int look(int direction) Return one of the constants Model.BUSH, Model.FOX,
Model.RABBIT, or Model.EDGE, depending on what the animal sees in
that direction.
int distance(int direction) Returns the number of steps the animal would
have to make in order to land on top of the nearest object (or go off the
edge of the playing area).
boolean canMove(int direction) Tells whether the animal can move in the
given direction without being stopped by a bush or the edge of the board.
Does not tell whether it’s a good idea to move in that direction.
3 Hints
You should check out Model.java and see what static resources it provides, as
well Animal.java, as it provides all the common actions an Animal can do.
If you’re at a loss on where to begin, check out Fox.java, since it provides
the algorithm for what the Fox does to chase down Rabbit.
4 Rubric
Most assignments are weighted at 100 points. This one will be weighted at 120.
100 points The rabbit survival rate. Your grade is the square root of the
percentage of times the rabbit survives times ten.
20 points You must explain your rabbit’s survival strategy to me or the TA
to get any credit at all for the assignment. If you’re nervous about describing
your strategy in front of the Professor or your TA, I recommend
commenting your code so you can read your comments like a script.
因为专业，所以值得信赖。如有需要，请加QQ：99515681 或邮箱：[email protected]
微信：codinghelp