src/Q9/Robot.java


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package Q9;

public class Robot {
  public static final int UP = 1;
  public static final int DOWN = 2;
  public static final int LEFT = 3;
  public static final int RIGHT = 4;
  public static final int LEFT_UP_CORNER = 5;
  public static final int LEFT_DOWN_CORNER = 6;
  public static final int RIGHT_UP_CORNER = 7;
  public static final int RIGHT_DOWN_CORNER = 8;

  public static final int NORTH = UP;
  public static final int NORTH_EAST = RIGHT_UP_CORNER;
  public static final int EAST = RIGHT;
  public static final int SOUTH_EAST = RIGHT_DOWN_CORNER;
  public static final int SOUTH = DOWN;
  public static final int SOUTH_WEST = LEFT_DOWN_CORNER;
  public static final int WEST = LEFT;
  public static final int NORTH_WEST = LEFT_UP_CORNER;
  public static final String R1 = "1";
  public static final String R2 = "2";
  public static final String COLLISION = "X";
  public static final String SPACE = " ";
  public static final String SEPARATOR = "|";

  private int x;
  private int y;

  public Robot(int x, int y) {
    this.x = x;
    this.y = y;
  }

  public int getX() {
    return x;
  }

  public int getY() {
    return y;
  }

  public void setX(int x) {
    this.x = x;
  }

  public void setY(int y) {
    this.y = y;
  }

  public boolean atPosition(int x, int y) {
    return getX() == x && getY() == y;
  }

  public static String printGrid(Robot r1, Robot r2) {
    String grid = "";

    for (int row = 0; row < 10; row++) {
      for (int column = 0; column < 10; column++) {
        boolean r1InCell = r1.atPosition(row, column);
        boolean r2InCell = r2.atPosition(row, column);

        grid += SEPARATOR;
        if (r1InCell && r2InCell) grid += COLLISION;
        else if (r1InCell) grid += R1;
        else if (r2InCell) grid += R2;
        else grid += SPACE;
      }
      grid += String.format("%s%s", SEPARATOR, System.lineSeparator());
    }
    return grid;
  }
}