public class BoundedGrid extends Grid
BoundedGrid is a rectangular, bounded two-dimensional
container data structure. It can contain any kind of object that
can be modeled using an extension of the GridObject class.
For example, a grid could be used to model a board for a
tic-tac-toe or chess game, an environment of fish for a marine
biology simulation, etc.
A BoundedGrid is implemented as a two-dimensional array
corresponding to the dimensions of the grid. This gives it the
following time and space characteristics:
| numObjects | O(1) | |
| allObjects | O(r * c) | |
| isValid, isEmpty, objectAt | O(1) | |
| add | O(1) | |
| remove | O(1) | |
| removeAll | O(r * c) | |
| space | O(r * c) |
r is the number of rows and c is the
number of columns in the grid.
The BoundedGrid class and its internal 2D array
implementation are based on the College Board's
BoundedEnv class, as allowed by the GNU General
Public License.
| Modifier and Type | Class and Description |
|---|---|
protected static class |
BoundedGrid.Array2DGridRep
The
Array2DGridRep class represents an internal bounded
grid using a two-dimensional array. |
Grid.BoundedGridValidityChecker, Grid.InternalRepresentation, Grid.UnboundedGridValidityChecker, Grid.ValidityCheckerincludeDiagonals, internalRep, UNBOUNDED| Constructor and Description |
|---|
BoundedGrid(boolean includeDiagonalNeighbors,
int rows,
int cols)
Constructs an empty BoundedGrid object with the given dimensions.
|
BoundedGrid(int rows,
int cols)
Constructs an empty BoundedGrid object with the given dimensions.
|
| Modifier and Type | Method and Description |
|---|---|
int |
numCols()
Returns number of columns in this grid.
|
int |
numRows()
Returns number of rows in this grid.
|
add, allObjects, getDirection, getNeighbor, isEmpty, isValid, neighborsOf, numAdjacentNeighbors, numObjects, objectAt, randomDirection, remove, remove, removeAll, toStringpublic BoundedGrid(int rows,
int cols)
rows > 0 and cols > 0.)rows - number of rows in BoundedGridcols - number of columns in BoundedGridjava.lang.IllegalArgumentException - if the precondition is not metpublic BoundedGrid(boolean includeDiagonalNeighbors,
int rows,
int cols)
includeDiagonalNeighbors parameter. Cells along
the grid boundaries will have fewer than the maximum four or
eight neighbors. If includeDiagonalNeighbors is
true, a cell's adjacent neighbors include the cells
to its north, south, east, and west and the cells on the diagonals,
to the northeast, southeast, northwest, and southwest. If
includeDiagonalNeighbors is false,
a cell's adjacent neighbors include only the four cells to its
north, south, east, and west.
(Precondition: rows > 0 and cols > 0.)includeDiagonalNeighbors - whether to include the four
diagonal locations as neighborsrows - number of rows in BoundedGridcols - number of columns in BoundedGridjava.lang.IllegalArgumentException - if the precondition is not met