Add Ship.java, Pair.java, fix Player.java, add ArrayList of ships in Battleship.java

src/battleship/model/Battleship.java

@@ -1,7 +1,9 @@
 package battleship.model;
 
+import java.util.ArrayList;
+
 public class Battleship {
 
-
+    public ArrayList<Ship> ships;
 
 }

src/battleship/model/Ship.java

@@ -0,0 +1,15 @@
+package battleship.model;
+
+import battleship.utils.Pair;
+
+public class Ship {
+
+    public Pair<Integer, Integer> coords;
+    public int size;
+
+    public Ship(Pair<Integer, Integer> coords, int size) {
+        this.coords = coords;
+        this.size = size;
+    }
+
+}

src/battleship/model/player/Player.java

@@ -1,20 +1,23 @@
 package battleship.model.player;
 
+import battleship.model.Ship;
 import battleship.utils.Triplet;
 
 import java.util.ArrayList;
 
 public abstract class Player {
 
-    protected ArrayList<Ships> ships = new ArrayList<>();
+    protected ArrayList<Ship> ships = new ArrayList<>();
     protected ArrayList<Triplet> moves = new ArrayList<>();
 
     public Player(){
         setShips();
     }
+
     public void setShips(){
 
     }
+
     public void addMove(Triplet move){
         moves.add(move);
     }

src/battleship/utils/Pair.java

@@ -0,0 +1,53 @@
+package battleship.utils;
+
+import java.util.Objects;
+
+/**
+ * tuple containing 2 unknown type elements
+ *
+ * @param <U> left
+ * @param <K> right
+ */
+public class Pair<U, K> {
+
+    private final U left;
+    private final K right;
+
+    public Pair(U left, K right) {
+        this.left = left;
+        this.right = right;
+    }
+
+    public U getLeft() {
+        return left;
+    }
+
+    public K getRight() {
+        return right;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        final Pair<?, ?> other = (Pair<?, ?>) obj;
+        return this.left.equals(other.getLeft()) && this.left.equals(other.getRight());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(left.hashCode(), right.hashCode());
+    }
+    
+    @Override
+    public String toString() {
+    	return "(" + left + ", " + right + ")";
+    }
+}