private void swapWithEmpty(int[][] newLayout, int destX, int destY) {
newLayout[(int) emptySpace.getY()][(int) emptySpace.getX()] = newLayout[destY][destX];
newLayout[destY][destX] = EMPTY_SPACE;
}
private boolean canSlideUp() {
return emptySpace.getY() != (n - 1);
}
private NPuzzleState slideLeft() {
int[][] copyOfLayout = TwoDArrayUtils.makeCopy(layout);
swapWithEmpty(copyOfLayout, (int) emptySpace.getX() + 1, (int) emptySpace.getY());
return new NPuzzleState(copyOfLayout, n);
}
private boolean canSlideDown() {
return emptySpace.getY() != 0;
}