import java.util.Arrays;
 
class Main{
  public static void main(String[] a){
    Main m = new Main();
    m.drawMap(19, 19, '+', 'C', 2, 5);
    System.out.println();
    m.drawMap(10, 10, '.', 'X', 4, 2);
    System.out.println();
    m.drawMap(5, 5, 'a', 'B', 5, 5);
  }
 
  /*
   * Prints a block of sizeX by sizeY of the filler character,
   * where the character at position {posX, posY} (1-indexed) is replaced with the replacement character
   * 
   * TODO: Validation checks. Currently assumes posX and posY are always within range of the matrix
   */
  public void drawMap(int sizeX, int sizeY, char fillerChar, char replacementChar, int posX, int posY){
    // Create a char-matrix of dimensions sizeX by sizeY
    char[][] matrix = new char[sizeX][sizeY];
 
    // Fill this matrix initially with the mapP character
    for(char[] row : matrix)
      Arrays.fill(row, fillerChar);
 
    // Replace the character at position {currX, currY} (1-indexed) with the mapC character
    matrix[posX-1][posY-1] = replacementChar;
 
    // Print the matrix
    prettyPrintMatrix(matrix);
  }
 
  private void prettyPrintMatrix(char[][] matrix){
    for(char[] row : matrix){
      for(char ch : row)
        System.out.print(ch);
      System.out.println();
    }
  }
}

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