app/src/main/java/school_project/Piece.java

@@ -1,5 +1,10 @@
 package school_project;
 
+import javafx.scene.paint.Color;
+import javafx.scene.paint.Paint;
+
+import java.util.Random;
+
 /**
  * Represent a Piece in the game.
  * Every Piece should be contained in a Map Object.
@@ -10,13 +15,20 @@ public class Piece extends Shape{
 
     private Vec2 Position;
     private Map linked_map;
-
-    public Piece() {
-        super();
-    }
+    private transient Paint color; // https://www.baeldung.com/java-transient-keyword
 
     public Piece(boolean[][] matrix) {
         super(matrix);
+        Random rand = new Random();
+        color = new Color(rand.nextDouble(), rand.nextDouble(), rand.nextDouble(), 1);
+    }
+
+    public void setColor(Paint p){
+        color = p;
+    }
+
+    public Paint getColor(){
+        return color;
     }
 
     public Vec2 getPosition() {
@@ -27,6 +39,7 @@ public class Piece extends Shape{
         this.Position = position;
     }
 
+
     /**
      * set the map the piece is into the the map argument
      * @param map map where to place the piece

app/src/test/java/school_project/PieceTest.java

@@ -36,7 +36,7 @@ class PieceTest {
                 {true, false, true},
         };
 
-        Piece piece1 = new Piece();
+        Piece piece1 = new Piece(piece2_matrix);
         piece1.setShape(piece1_matrix);
 
         Piece piece2 = new Piece(piece2_matrix);