public class Grid
{
    public static final int DEFAULT_WIDTH = 5;
    public static final int DEFAULT_HEIGHT = 5;
}
@@ -107,10 +107,272 @@
 GHT = 5;
+%0A%0A    public Grid ()%0A    %7B%0A        this(DEFAULT_HEIGHT, DEFAULT_WIDTH);%0A    %7D%0A%0A    public Grid (int height, int width)%0A    %7B%0A        _height = height;%0A        _width = width;%0A    %7D%0A%0A    private Tile%5B%5D%5B%5D _theWorld;%0A    private int _height;%0A    private int _width;
 %0A%7D

Update Grid.java