to string and setState + doc

src/GomokuCell.java

@@ -1,4 +1,5 @@
 import java.util.EnumMap;
+import java.util.concurrent.ExecutionException;
 
 /**
  * This class is cell of the board of the Gomoku game.
@@ -47,6 +48,17 @@ public class GomokuCell{
         return this.state;
     }
 
+    //------------------Sets--------------------------
+    
+    /**
+     *
+     */
+    public void setState(Color c){
+        if (!this.isPlayable())
+            throw new IllegalStateException("This cell is not playable !" + this.toString());
+        this.state = c;
+    }
+    
 
     //------------------Booleans--------------------------
 
@@ -86,4 +98,9 @@ public class GomokuCell{
         this.neighbour.put(car, cell);
     }
 
+    //------------------Overides--------------------------
+    @Override
+    public String toString() {
+        return this.neighbour.toString() + this.state.toString();
+    }
 }