DiceyLab/Bins.ctxt

@@ -0,0 +1,11 @@
+#BlueJ class context
+comment0.target=Bins
+comment1.params=
+comment1.target=Bins()
+comment2.params=
+comment2.target=java.lang.Integer\ getTens()
+comment3.params=key
+comment3.target=void\ increment(java.lang.Integer)
+comment4.params=key
+comment4.target=java.lang.Integer\ getN(int)
+numComments=5

DiceyLab/Bins.java

@@ -0,0 +1,35 @@
+import java.util.TreeMap;
+public class Bins
+{
+    public TreeMap<Integer, Integer> bins = new TreeMap<Integer,Integer>(); 
+
+    public Bins()
+    {
+        bins.put(2,0);
+        bins.put(3,0);
+        bins.put(4,0);
+        bins.put(5,0);
+        bins.put(6,0);
+        bins.put(7,0);
+        bins.put(8,0);
+        bins.put(9,0);
+        bins.put(10,0);
+        bins.put(11,0);
+        bins.put(12,0);
+    }
+
+    public Integer getTens(){
+        return bins.get(10);
+    }
+
+    public void increment(Integer key){
+        Integer count = bins.get(key);
+        bins.put(key, count + 1);
+    }
+    
+    public Integer getN(int key){
+        return bins.get(key);
+    }
+
+
+}

DiceyLab/BinsTest.ctxt

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+#BlueJ class context
+comment0.target=BinsTest
+comment1.params=
+comment1.target=void\ setUp()
+comment2.params=
+comment2.target=void\ testGetBin()
+comment3.params=
+comment3.target=void\ testIncrementBin()
+numComments=4

DiceyLab/BinsTest.java

@@ -0,0 +1,36 @@
+
+
+import static org.junit.Assert.*;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+
+public class BinsTest
+{
+
+    @Before
+    public void setUp()
+    {   
+    }
+
+    @Test
+    public void testGetBin(){
+        Bins test = new Bins();
+        
+        Integer expected = 0;
+        Integer actual = test.getTens();
+        assertEquals(expected, actual);
+    }
+    
+    @Test
+    public void testIncrementBin(){
+        Bins test = new Bins();
+        
+        Integer expected = 1;
+        test.increment(10);
+        Integer actual = test.getTens();
+        assertEquals(expected, actual);
+    }
+    
+}

DiceyLab/Dice.ctxt

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+#BlueJ class context
+comment0.target=Dice
+comment1.params=
+comment1.target=Dice()
+comment2.params=numberOfDice
+comment2.target=Dice(int)
+comment3.params=
+comment3.target=java.lang.Integer\ roll()
+comment4.params=numberOfRolls
+comment4.target=java.lang.Integer\ roll(int)
+numComments=5

DiceyLab/Dice.java

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+
+public class Dice
+{
+    private int numberOfDice = 1;
+
+    public Dice()
+    {
+    }
+
+    public Dice (int numberOfDice){
+        this.numberOfDice = numberOfDice;    
+    }
+
+    public Integer roll(){ 
+        int counter = numberOfDice;
+        Integer sum = 0;
+        while (counter > 0){
+            sum += (int)(Math.random()*6)+1;
+            counter--;
+        }
+        return sum;
+    }
+
+    public Integer roll(int numberOfRolls)
+    {
+        Integer sum = 0;
+        while (numberOfRolls > 0){
+            sum += roll();
+            numberOfRolls--;
+        }
+        return sum;
+    }
+}

DiceyLab/DiceTest.ctxt

@@ -0,0 +1,15 @@
+#BlueJ class context
+comment0.target=DiceTest
+comment1.params=
+comment1.target=void\ setUp()
+comment2.params=
+comment2.target=void\ rollDiceTest()
+comment3.params=
+comment3.target=void\ rollTwoDiceTest()
+comment4.params=
+comment4.target=void\ rollTwoDiceTwiceTest()
+comment5.params=
+comment5.target=void\ rollThreeDiceTest()
+comment6.params=
+comment6.target=void\ rollThreeDiceTwiceTest()
+numComments=7

DiceyLab/DiceTest.java

@@ -0,0 +1,58 @@
+
+
+import static org.junit.Assert.*;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+
+public class DiceTest
+{
+
+    @Before
+    public void setUp()
+    {
+    }
+    
+    @Test
+    public void rollDiceTest(){
+        Dice dice = new Dice();
+        Integer given = dice.roll();
+        Integer min = 1;
+        Integer max = 6;
+        assertTrue(min <= given && given <= max );    
+    }
+    
+    @Test
+    public void rollTwoDiceTest(){
+        Dice dice = new Dice(2);
+        Integer expected = 6;         
+        Integer given = dice.roll();
+        assertEquals(expected, given, 6);    
+    }
+    
+    @Test
+    public void rollTwoDiceTwiceTest(){
+        Dice dice = new Dice(2);
+        Integer expected = 14;
+        Integer given = dice.roll(2);
+        assertEquals(expected, given, 10);        
+    }
+    
+    @Test
+    public void rollThreeDiceTest(){
+        Dice dice = new Dice(3);
+        Integer expected = 10;
+        Integer given = dice.roll();
+        assertEquals(expected, given, 7.5);        
+    }
+    
+    @Test
+    public void rollThreeDiceTwiceTest(){
+        Dice dice = new Dice(3);
+        Integer expected = 21;
+        Integer given = dice.roll(2);
+        assertEquals(expected, given, 15);        
+    }
+
+}

DiceyLab/README.TXT

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+------------------------------------------------------------------------
+This is the project README file. Here, you should describe your project.
+Tell the reader (someone who does not know anything about this project)
+all he/she needs to know. The comments should usually include at least:
+------------------------------------------------------------------------
+
+PROJECT TITLE:
+PURPOSE OF PROJECT:
+VERSION or DATE:
+HOW TO START THIS PROJECT:
+AUTHORS:
+USER INSTRUCTIONS:

DiceyLab/Simulation.ctxt

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+#BlueJ class context
+comment0.target=Simulation
+comment1.params=numberOfDice\ numberOfRolls
+comment1.target=Simulation(int,\ int)
+comment2.params=
+comment2.target=void\ runSimulation()
+comment3.params=bin
+comment3.target=void\ printResults(Bins)
+numComments=4

DiceyLab/Simulation.java

@@ -0,0 +1,46 @@
+import java.util.TreeMap;
+public class Simulation
+{
+    private int numberOfDice;
+    private int numberOfRolls;
+
+    public Simulation(int numberOfDice, int numberOfRolls){
+        this.numberOfDice = numberOfDice;
+        this.numberOfRolls = numberOfRolls;
+    }
+
+    public void runSimulation(){
+        Simulation sims = new Simulation(2, numberOfRolls);
+        Dice dice = new Dice(numberOfDice);
+        Bins results = new Bins();
+
+        int currentRoll = 0;
+        while(currentRoll < numberOfRolls){
+            int result = dice.roll();
+            currentRoll++;
+            results.increment(result);
+        }
+        printResults(results);
+    }
+
+    public void printResults(Bins bin){
+        System.out.println("********************************\n" +
+                           " Rolling 2 Dice 1,000,000 times \n" +
+                           "********************************");
+        for (int i = 2; i <= 12; i++){
+            StringBuilder stars = new StringBuilder();
+            Float percent = (bin.getN(i) /1000000f);
+            double uh = (float)(((int)(Math.pow(10,2)*percent))/Math.pow(10,2));
+            
+            while(uh > 0){
+                stars.append("*");
+                uh -= 0.01;
+            }
+            String s = stars.toString();
+            
+            System.out.println(String.format("%2s : %7s : %2.2f : %s", i, bin.getN(i), percent,s));
+        }
+        
+    }
+
+}

DiceyLab/package.bluej

@@ -0,0 +1,42 @@
+#BlueJ package file
+dependency1.from=DiceTest
+dependency1.to=Dice
+dependency1.type=UsesDependency
+editor.fx.0.height=682
+editor.fx.0.width=800
+editor.fx.0.x=240
+editor.fx.0.y=23
+objectbench.height=101
+objectbench.width=776
+package.divider.horizontal=0.6
+package.divider.vertical=0.8007380073800738
+package.editor.height=427
+package.editor.width=674
+package.editor.x=302
+package.editor.y=112
+package.frame.height=600
+package.frame.width=800
+package.numDependencies=1
+package.numTargets=2
+package.showExtends=true
+package.showUses=true
+project.charset=UTF-8
+readme.height=58
+readme.name=@README
+readme.width=47
+readme.x=10
+readme.y=10
+target1.height=50
+target1.name=Dice
+target1.showInterface=false
+target1.type=ClassTarget
+target1.width=80
+target1.x=211
+target1.y=171
+target2.height=50
+target2.name=DiceTest
+target2.showInterface=false
+target2.type=UnitTestTargetJunit4
+target2.width=80
+target2.x=261
+target2.y=148

simresults

@@ -0,0 +1,14 @@
+********************************
+ Rolling 2 Dice 1,000,000 times
+********************************
+ 2 :   27834 : 0.03 : **
+ 3 :   55943 : 0.06 : ******
+ 4 :   83687 : 0.08 : ********
+ 5 :  110414 : 0.11 : ***********
+ 6 :  138788 : 0.14 : *************
+ 7 :  166853 : 0.17 : ****************
+ 8 :  139144 : 0.14 : *************
+ 9 :  110972 : 0.11 : ***********
+10 :   83185 : 0.08 : ********
+11 :   55401 : 0.06 : ******
+12 :   27779 : 0.03 : **