fix review comments

Author: SvitlanaLychagina

src/main/java/core/basesyntax/Application.java

@@ -1,14 +1,13 @@
 package core.basesyntax;
 
 public class Application {
+    private static final int NUMBER_OF_BALLS = 3;
+
     public static void main(String[] args) {
-        // create three balls using class Lottery and print information about them in console
         Lottery lottery = new Lottery();
-        Ball firstBall = lottery.getRandomBall();
-        Ball secondBall = lottery.getRandomBall();
-        Ball thirdBall = lottery.getRandomBall();
-        System.out.println(firstBall.toString());
-        System.out.println(secondBall.toString());
-        System.out.println(thirdBall.toString());
+        for (int i = 0; i < NUMBER_OF_BALLS; i++) {
+            Ball ball = lottery.getRandomBall();
+            System.out.println(ball.toString());
+        }
     }
 }

src/main/java/core/basesyntax/Ball.java

@@ -2,18 +2,18 @@
 
 public class Ball {
 
-    private String colour;
+    private String color;
 
     private int number;
 
-    public Ball(String colour, int number) {
-        this.colour = colour;
+    public Ball(String color, int number) {
+        this.color = color;
         this.number = number;
     }
 
     @Override
     public String toString() {
-        return "Ball colour is " + colour
+        return "Ball colour is " + color
             + " number is " + number;
     }
 }

src/main/java/core/basesyntax/ColorSupplier.java

@@ -3,9 +3,9 @@
 import java.util.Random;
 
 public class ColorSupplier {
+    private final Random random = new Random();
+
     public String getRandomColor() {
-        int index = new Random().nextInt(Colours.values().length);
-        Colours colour = Colours.values()[index];
-        return colour.toString();
+        return Colors.values()[random.nextInt(Colors.values().length)].name();
     }
 }

src/main/java/core/basesyntax/Colours.java renamed to src/main/java/core/basesyntax/Colors.java

@@ -1,6 +1,6 @@
 package core.basesyntax;
 
-public enum Colours {
+public enum Colors {
     PINK,
     PURPLE,
     BLUE,

src/main/java/core/basesyntax/Lottery.java

@@ -3,11 +3,11 @@
 import java.util.Random;
 
 public class Lottery {
+    private static final int MAX_NUMBER = 101;
     private final ColorSupplier colorSupplier = new ColorSupplier();
+    private final Random random = new Random();
 
     public Ball getRandomBall() {
-        String randomColour = colorSupplier.getRandomColor();
-        int randomNumber = new Random().nextInt(100);
-        return new Ball(randomColour, randomNumber);
+        return new Ball(colorSupplier.getRandomColor(), random.nextInt(MAX_NUMBER));
     }
 }