README.md

@@ -1,23 +1,23 @@
-# Kris-Tof Dice Toss
+# Kris-Tof main.Dice Toss
 
-Create a `Dice` class that acts like a set of N random-tossed dies.
+Create a `main.Dice` class that acts like a set of N random-tossed dies.
 ```
-Dice dice = new Dice(2); // for craps
-Dice dice = new Dice(5); // for yatzee
+main.Dice dice = new main.Dice(2); // for craps
+main.Dice dice = new main.Dice(5); // for yatzee
 
 Integer toss = dice.tossAndSum();
 ```
-make a couple unit tests for the Dice class. 
+make a couple unit tests for the main.Dice class. 
 
-Create a tracking class `Bins` that can be used to track the results of dice tosses.
+Create a tracking class `main.Bins` that can be used to track the results of dice tosses.
 
 ```
-Bins results = new Bins(2, 12); // for bins from 2..12
+main.Bins results = new main.Bins(2, 12); // for bins from 2..12
 Integer numberOfTens = results.getBin(10); // returns the number of tens in the 10 bin
 results.incrementBin(10); // should increment bin # 10
 
 ```
-make a couple unit tests for the Bins class. Your test methods should follow this template:
+make a couple unit tests for the main.Bins class. Your test methods should follow this template:
 
     in the tests
     Create a new Bin
@@ -27,7 +27,7 @@ make a couple unit tests for the Bins class. Your test methods should follow thi
     
     
 
-Create a `Simulation` class whose Constructor takes arguments:
+Create a `main.Simulation` class whose Constructor takes arguments:
     numberOfDies to throw
     numberOfTosses to run
 
@@ -35,7 +35,7 @@ Create a simulation where two dies are thrown *one million times*.
 Keep track of each roll by incrementing the correct Bin.
 
 ```
-Simulation sim = new Simulation(2, 10000);
+main.Simulation sim = new main.Simulation(2, 10000);
 
 sim.runSimulation();
 
@@ -53,7 +53,7 @@ the results of the sim.printResults() should be an output string that looks like
 
 ```
 ***
-Simulation of 2 dice tossed for 1000000 times.
+main.Simulation of 2 dice tossed for 1000000 times.
 ***
 
  2 :    27917: 0.03 **

pom.xml

@@ -8,5 +8,21 @@
     <artifactId>Dicey-Lab</artifactId>
     <version>1.0-SNAPSHOT</version>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+
+        <!-- https://mvnrepository.com/artifact/junit/junit -->
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 
 </project>

src/main/java/Bins.java

@@ -1,4 +0,0 @@
-
-public class Bins {
-
-}

src/main/java/Dice.java

@@ -1,4 +0,0 @@
-public class Dice {
-
-
-}

src/main/java/Simulation.java

@@ -1,5 +0,0 @@
-public class Simulation {
-
-
-
-}

src/main/java/main/Bins.java

@@ -0,0 +1,29 @@
+package main;
+
+import java.util.TreeMap;
+
+public class Bins {
+    private int min;
+    private int max;
+    private TreeMap<Integer, Integer> results;
+
+    public Bins(int min, int max) {
+        this.min = min;
+        this.max = max;
+        results = new TreeMap<Integer, Integer>();
+        for(int i = min; i <= max; i++) {
+            results.put(i, 0);
+        }
+    }
+
+    public int getBin(int number) {
+        return results.get(number);
+    }
+
+    public void incrementBin(int number) {
+        int value = results.get(number);
+        value++;
+        results.put(number, value);
+
+    }
+}

src/main/java/main/Dice.java

@@ -0,0 +1,17 @@
+package main;
+
+public class Dice {
+    private int numberOfDie;
+
+    public Dice(int numberOfDie) {
+        this.numberOfDie = numberOfDie;
+    }
+
+    public int tossAndSum() {
+        int sum = 0;
+        for(int i = numberOfDie; i > 0; i--) {
+            sum += (int) (Math.random() * 6 + 1);
+        }
+        return sum;
+    }
+}

src/main/java/main/Main.java

@@ -0,0 +1,12 @@
+package main;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        Simulation sim = new Simulation(2, 1000000);
+        sim.runSimulation();
+        sim.printResults();
+
+    }
+}

src/main/java/main/Simulation.java

@@ -0,0 +1,65 @@
+package main;
+
+public class Simulation {
+    private int numberOfDies;
+    private int numberOfTosses;
+    private Bins result;
+    private Dice dice;
+
+    public Simulation(int numberOfDies, int numberOfTosses) {
+        this.numberOfDies = numberOfDies;
+        this.numberOfTosses = numberOfTosses;
+        this.result = new Bins(numberOfDies, numberOfDies * 6);
+        this.dice = new Dice(numberOfDies);
+    }
+
+    public void runSimulation() {
+        for(int i = 0; i < numberOfTosses; i++) {
+            int sum = dice.tossAndSum();
+            result.incrementBin(sum);
+        }
+    }
+
+    public void printResults() {
+        System.out.println("***");
+        System.out.println("Simulation " + numberOfDies + " dice tossed for " + numberOfTosses + " times.");
+        System.out.println("***");
+        System.out.println();
+
+        for(int i = numberOfDies; i <= numberOfDies * 6; i++) {
+
+            double average = (double) result.getBin(i)/numberOfTosses;
+            String stars = "";
+            if (average >= 0 && average < 0.025) {
+                stars = "*";
+            }
+
+            if(average  > 0.025 && average < 0.05) {
+                stars = "**";
+            }
+
+            if(average > 0.050 && average < 0.075) {
+                stars = "*****";
+            }
+
+            if(average > 0.075 && average < 0.10) {
+                stars = "********";
+            }
+
+            if(average > 0.10 && average < 0.125) {
+                stars = "***********";
+            }
+
+            if(average > 0.125 && average < 0.15) {
+                stars = "*************";
+            }
+
+            if(average > 0.15 && average < 0.175) {
+                stars = "****************";
+            }
+
+            System.out.println(String.format("%2d :",i) + String.format("%10d:  ", result.getBin(i)) +
+                    String.format("%.2f  ",(double) result.getBin(i)/numberOfTosses) + stars);
+        }
+    }
+}