Dicey lab complete

binResults.txt

@@ -0,0 +1,11 @@
+ 2 :   27769: 0.03 **
+ 3 :   55480: 0.06 *****
+ 4 :   83443: 0.08 ********
+ 5 :  111434: 0.11 ***********
+ 6 :  138721: 0.14 *************
+ 7 :  166952: 0.17 ****************
+ 8 :  139571: 0.14 *************
+ 9 :  110167: 0.11 ***********
+10 :   82916: 0.08 ********
+11 :   55762: 0.06 *****
+12 :   27785: 0.03 **

pom.xml

@@ -7,6 +7,26 @@
     <groupId>com.zipcodewilmington</groupId>
     <artifactId>Dicey-Lab</artifactId>
     <version>1.0-SNAPSHOT</version>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>15</source>
+                    <target>15</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.8.2</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 
 
 </project>

src/main/java/Bins.java

@@ -1,4 +1,28 @@
+import java.util.Arrays;
 
 public class Bins {
 
+    int min;
+    int max;
+    Integer[] bins;
+
+    public Bins(int min, int max) {
+        this.min = min;
+        this.max = max;
+        bins = new Integer[max - min + 1];
+        Arrays.fill(bins, 0);
+    }
+
+    public int getBin(int binNumber) {
+        return bins[binNumber - min];
+    }
+
+    public int incrementBin(int binNumber) {
+        return bins[binNumber - min]++;
+    }
+
+    public Integer[] getBins() {
+        return bins;
+    }
 }
+

src/main/java/Dice.java

@@ -1,4 +1,25 @@
+import java.util.ArrayList;
+import java.util.Random;
+
 public class Dice {
 
+    int numOfDice;
+
+    public Dice(int numOfDice) {
+        this.numOfDice = numOfDice;
+    }
+
+    public Dice() {}
+
+    public int getNumberOfDice() {
+        return numOfDice;
+    }
 
+    public int tossAndSum() {
+        int sum = 0;
+        for(int i = 0; i < numOfDice; i++) {
+            sum += (Math.random() * 6) + 1;
+        }
+        return sum;
+    }
 }

src/main/java/Simulation.java

@@ -1,5 +1,54 @@
+import java.util.ArrayList;
+import java.util.List;
+
 public class Simulation {
 
+    int numOfDice;
+    int numOfRolls;
+    Dice dice;
+    Bins bins;
+
+    public Simulation(int numOfDice, int numOfRolls) {
+        this.numOfDice = numOfDice;
+        this.numOfRolls = numOfRolls;
+    }
+
+    public void runSimulation(){
+        int result;
+        this.bins = new Bins(numOfDice, numOfDice * 6);
+        this.dice = new Dice(numOfDice);
+        for(int i = 0; i < numOfRolls; i++) {
+            result = dice.tossAndSum();
+            bins.incrementBin(result);
+        }
+        System.out.println("");
+    }
+
+    public void printResults() {
+        for(int i = numOfDice; i <= numOfDice * 6; i++) {
+            Double percentage = (double) bins.getBin(i) / numOfRolls;
+            System.out.printf(
+                    "%2d : %7d: %.2f ", i, bins.getBin(i), percentage);
+            for(int j = 1; j < percentage * 100; j++) {
+                System.out.print("*");
+            }
+            System.out.println();
+        }
+
+    }
+
+    public double getPercentage(int numOfRolls, Bins bins) {
+        double percentage = 0;
+        for(int element : bins.getBins()) {
+            percentage = ((double) element / numOfRolls);
+        }
+        return percentage;
+    }
 
+    public static void main(String[] args) {
+        Simulation simulation = new Simulation(2, 1000000);
+        simulation.runSimulation();
+        simulation.printResults();
+    }
 
 }

src/test/java/BinsTest.java

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

src/test/java/DiceTest.java

@@ -0,0 +1,33 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+public class DiceTest {
+
+    @Test
+    public void testGetNumberOfDice() {
+        //given
+        int expected = 2;
+        //when
+        Dice dice = new Dice(expected);
+        int actual = dice.getNumberOfDice();
+        //then
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void testTossAndSum() {
+        //given
+        int numOfDice = 2;
+        int expected = 8;
+        Dice dice = new Dice(2);
+        //when
+        int actual = dice.tossAndSum();
+        //then
+        System.out.println(actual);
+    }
+}
+
+
+// need number of dice
+// need to roll dice
+// need sum of dice