some changes to worm

src/Worm.java

@@ -13,9 +13,11 @@ public class Worm {
     private double minRadius;
     // mass
     private double mass;
+    private final int rho = 1062;
 
     // points
-    private double points;
+    private int points;
+    private int maxPoints;
 
     // name
     private final String name;
@@ -103,6 +105,7 @@ public class Worm {
 
     public void setRadius(double radius) {
         this.radius = radius;
+        setMass(radius);
     }
 
     public double getMinRadius() {
@@ -117,19 +120,26 @@ public class Worm {
         return this.mass;
     }
 
-    public void setMass(double mass) {
+    private void setMass(double radius) {
+
+        double mass = this.rho * (4 / 3 * Math.PI * Math.pow(radius, 3));
+
         this.mass = mass;
+        setMaxPoints(mass);
     }
 
-    public double getPoints() {
+    public int getPoints() {
         return this.points;
     }
 
-    public void setPoints(double points) {
+    public void setPoints(int points) {
         this.points = points;
     }
 
     public String getName() {
         return this.name;
     }
+    private void setMaxPoints(double maxPoints) {
+        this.maxPoints = (int) Math.round(maxPoints);
+    }
 }