Layer

public class Layer extends Terrain{

    public Block[][] map;
    public ArrayList<Block> blockList = new ArrayList<Block>();

    public Layer(int x, int y, int width, int height, int cellSize, ArrayList<Block> blockList){
        super(x, y, width, height, cellSize);

        this.blockList = blockList;

        init();
    }

    private void init(){
        map = new Block[getWidth()][getHeight()];
        map = initMap(map);
        map = switchBlock(map);
    }

    // Generate Random Block at x and y positions
    private Block[][] initMap(Block[][] map){
        int x, y;

        Random random = new Random();

        for(x = 0; x < getWidth(); x++){
            for(y = 0; y < getHeight(); y++){
                map[x][y] = blockList.get(random.nextInt(blockList.size()));
            }
        }
        return map;
    }

    // For every block check adjacent blocks and swith them to grass if current block is water
    private Block[][] switchBlock(Block[][] map){
        int currentX, currentY;

        for(currentX = 0; currentX < getWidth(); currentX++){
            for(currentY = 0; currentY < getHeight(); currentY++){

                if(map[currentX][currentY].getType() == BlockType.WATER){

                    int finalX, finalY;
                    int tempX = -1;
                    int tempY = -1;

                    if(currentX == 0) tempX = 0;
                    if(currentY == 0) tempY = 0;

                    for(finalX = tempX; finalX <= 1; finalX++){
                        for(finalY = tempY; finalY <= 1; finalY++){

                            if(map[finalX][finalY].getType() != BlockType.WATER){
                                if(map[finalX][finalY].getType() != BlockType.GRASS_1){
                                    map[finalX][finalY] = blockList.get(1);
                                }
                            }
                        }
                    }
                }
            }
        }
        return map;
    }

    // Draw blocks on screen
    public void render(Graphics g){
        int x, y;
        int posX = getPosX();
        int posY = getPosY();

        for(x = 0; x < getWidth(); x++){
            if(x != 0) posX = posX + getCellSize();

            for(y = 0; y < getHeight(); y++){
                posY = posY + getCellSize();

                if(y == (getHeight() - 1)) posY = getPosY();

                g.drawImage(map[x][y].getImage(), posX, posY, null);
            }
        }
    }
}