CS 112 - Introduction to Computer Science II Individual Exercise #5

Due: At the beginning of class 29.

NOTE: This work is to be done independently. 

Your assignment submission will consist of a single file: Chomp.java.  Testing and grading will be manual.  No JUnit test will provide evaluative feedback, so test your application thoroughly.

Chomp Graphical Application

In this exercise, you will implement Chomp.java, a Java graphical application for hotseat play the game of Chomp.

First, you will utilize these 50-by-50 PNG images.  Image "black.png" represents a "chomped" or empty grid cell. Images "cookie-skull.png" and "cookie.png" represents an "unchomped" or non-empty grid cell that are at [0][0] or not at [0][0], respectively.  You will load them into your GUI via internet connection, e.g.:

	static final String PATH = "http://cs.gettysburg.edu/~tneller/cs112/chomp/images/";
	static final Image COOKIE_IMAGE = new Image(PATH + "cookie.png");
	static final Image SKULL_IMAGE = new Image(PATH + "cookie-skull.png"); 
	static final Image BLACK_IMAGE = new Image(PATH + "black.png"); 

Then familiarize yourself with the rules to Chomp.  NOTE: Your layout will have poisoned square [0][0] in the upper-left corner of the displayed grid.

Graphical Application

Create a Java graphical application for playing Chomp with the following requirements:

• Initially display an empty, endgame 9-by-9 grid in a frame with the title "Chomp".  There should be a gap of at least one pixel between grid cell contents that allows the user to discern the grid.  The "black" image is used to display an empty, "chomped" position.  It is recommended, but not required, that you create a grid of 50-by-50 image buttons. (Google how you size and set a button image.)
• When the grid is empty (i.e. the endgame state) and a user clicks on a grid square, that is interpreted as a request to play a new game that has that grid cell as the far lower-right corner of the initial unchomped rectangle of squares.  Change the endgame state to the indicated initial state accordingly, displaying the cookie-skull image in the upper left corner ([0][0]) and cookie images elsewhere in the initial rectangle.
• When the grid is not empty and a user clicks in a chomped square, nothing happens.
• When the grid is not empty and a user clicks in an unchomped square, that square and all squares in the rectangle bounded by that square and the lower-right corner are "chomped", that is, made empty (black).
• The Scene and Stage should be sized just large enough to contain the grid, and all grid cells should be sized to the 50-by-50 images.

Example Screenshots

For example, when we run our Chomp.java application, the game might look like this grid of black image buttons:

If a user clicks on the button at 0-based row 6, column 7, a new game is set up like this:

If, on the first turn, a player clicks on the button at 0-based row 2, column 5, this would be the resulting state:

Todd W. Neller