to correct later

src/main/java/shape/Circle.java

@@ -7,17 +7,23 @@ import javafx.scene.paint.Color;
 public class Circle implements Shape {
 
     private double radius, x, y;
+    private Color fillColor;
 
     public Circle(double x, double y, double radius) {
         this.x = x;
         this.y = y;
         this.radius = radius;
+        this.fillColor = Color.GREEN;
     }
 
 
     @Override
     public void paint(GraphicsContext graphicsContext) {
-        graphicsContext.setStroke(Color.RED);
+        graphicsContext.setStroke(Color.BLACK);
+        if(isFinished) {
+            graphicsContext.setFill(Color.GREEN);
+            graphicsContext.fillOval(x - radius, y - radius, 2 * radius, 2 * radius);
+        }
         graphicsContext.strokeOval(x-radius, y-radius, 2 * radius, 2 * radius);
     }
 
@@ -33,8 +39,17 @@ public class Circle implements Shape {
         this.x += dx;
         this.y += dy;
     }
+
+    @Override
+    public boolean isFinished() {
+        return true;
+    }
+
     public void updateRadius(double newX, double newY) {
         this.radius = Math.sqrt(Math.pow(newX - this.x, 2) + Math.pow(newY - this.y, 2));
     }
 
+    public void setFillColor(Color fillColor) {
+        this.fillColor = fillColor;
+    }
 }

src/main/java/shape/Rectangle.java

@@ -36,6 +36,12 @@ public class Rectangle implements Shape{
         x += dx;
         y += dy;
     }
+
+    @Override
+    public boolean isFinished() {
+        return false;
+    }
+
     public void updateSize(double newX, double newY) {
         this.width = Math.abs(newX - this.x);
         this.height = Math.abs(newY - this.y);

src/main/java/shape/Shape.java

@@ -7,4 +7,5 @@ public interface Shape {
     void paint(GraphicsContext graphicsContext);
     boolean contains(double x, double y);
     void translate(double dx, double dy);
+    boolean isFinished();
 }