dicey diceylab done

src/main/java/Bins.java

@@ -1,4 +1,30 @@
+import java.util.Arrays;
 
 public class Bins {
+    private int binMin;
+    private int binMax;
+    private Integer[] boxes;
 
+    public Bins(int binMin, int binMax) {
+        this.binMin = binMin;
+        this.binMax = binMax;
+        boxes = new Integer[binMax - binMin + 1];
+        Arrays.fill(boxes, 0); //populate bins (boxes) with 0's as initial value
+    }
+
+    public void incrementBin(int binNum) {
+        boxes[binNum - binMin ]++; //binNum - number of dice - raises bin min by 1 each extra dice
+    }
+
+    public Integer getBin(int binNum) {
+        return boxes[binNum - binMin];
+    }
+
+    public Integer[] getBoxes() {
+        return boxes;
+    }
+
+    public int getBinMin() {
+        return binMin;
+    }
 }

src/main/java/Dice.java

@@ -1,4 +1,19 @@
 public class Dice {
+    private int numberOfDice;
 
+    public Dice(int numberDice) {
+        this.numberOfDice = numberDice;
+    }
 
+    public Integer tossAndSum() {
+        Integer sum = 0;
+        int minimum = 1;
+        int maximum = 7;
+
+        for (int i = 0; i < numberOfDice; i++) {
+             sum +=  minimum + (int)(Math.random() * (maximum - minimum));
+
+        }
+        return sum;
+    }
 }

src/main/java/Simulation.java

@@ -1,5 +1,53 @@
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.util.ArrayList;
+import java.util.List;
+
 public class Simulation {
 
 
+    public static void main(String[] args) {
+        int numDice = 2;
+        Dice dice =  new Dice(numDice);
+        Bins bin =  new Bins(numDice, numDice*6);
+
+        for (int i = 0; i <1000000; i++) {
+            bin.incrementBin(dice.tossAndSum());
+        }
+         printResults(1000000, bin );
+    }
+
+    public static List<Double> tally(Integer numOfTosses, Bins bin) {
+        List<Double> percent = new ArrayList<Double>();
+        for (Integer element : bin.getBoxes()){
+            double tallyPercent = ((double)element / numOfTosses);
+            BigDecimal bigD = new BigDecimal(Double.toString(tallyPercent));
+            bigD = bigD.setScale(2, RoundingMode.HALF_UP);
+            percent.add(bigD.doubleValue()); //adds bigD into percent array
+        }
+        return percent;
+    }
+
+    public static void printResults(Integer numOfTosses, Bins bins){
+        List<Double> results =  tally(numOfTosses, bins);
+        Integer diceNum = bins.getBinMin();
+        Integer numOfStars = 0;
+        String printResults = "";
+
+        for (Double element : results) {
+            numOfStars = (int)(element * 100);
+            printResults += String.format("%3d:   %7d  %1.2f ", diceNum, bins.getBin(diceNum), element);
+            for (int j = 1; j < numOfStars; j++) {
+                printResults += "*";
+            }
+            diceNum++;
+            printResults += "\n";
+        }
+        System.out.println(printResults);
+
+
+    }
+
+
 
 }

src/results

@@ -0,0 +1,11 @@
+  2:     27535  0.03 **
+  3:     55252  0.06 *****
+  4:     83104  0.08 *******
+  5:    111452  0.11 **********
+  6:    138665  0.14 *************
+  7:    166394  0.17 ****************
+  8:    139454  0.14 *************
+  9:    111419  0.11 **********
+ 10:     83438  0.08 *******
+ 11:     55416  0.06 *****
+ 12:     27871  0.03 **