Player.java

package com.bootcamp.battleship;

import java.util.ArrayList;

public class Player {
    public static final String SHIP_VALUE = "B";

    public Map map;
    private String name;
    private ArrayList<Coordinate> missile = new ArrayList<Coordinate>();

    public Player(String name, Map map){
        if (name.isEmpty()) {
            throw new IllegalArgumentException("Name should not empty");
        }

        this.name = name;
        this.map = map;
    }

    public String getName() {
        return this.name;
    }

    public void addShip(Coordinate shipCoordinate) {
        checkCoordinate(shipCoordinate);
        this.map.change(shipCoordinate, SHIP_VALUE);
    }

    public void addMissile(Coordinate missileCoordinate) {
        checkCoordinate(missileCoordinate);
        this.missile.add(missileCoordinate);
    }

    public int countShip() {
        return this.map.count(SHIP_VALUE);
    }

    public void attack(Player enemy) {
        for (Coordinate eachMissile : this.missile) {
            System.out.flush();
            System.out.println(enemy.map.get(eachMissile));
            if (enemy.map.get(eachMissile).equals(SHIP_VALUE)) {
                enemy.map.change(eachMissile, "X");
            } else {
                enemy.map.change(eachMissile, "O");
            }
        }
    }

    private void checkCoordinate(Coordinate coordinate) {
        int xAxis = coordinate.getXAxis();
        int yAxis = coordinate.getYAxis();

        if (xAxis < 0 || yAxis < 0) {
            throw new IllegalArgumentException("Coordinate should not negative");
        }
    }
}