Quiz completed

LoopFun.java

@@ -8,7 +8,12 @@ public class LoopFun
        * @return the factorial of the number
        */
       public int factorial(int number){
-          return -1;
+          int factorial = 1;
+          for (int i = 1; i <= number; i++) {
+              factorial *= i;
+            }
+          
+          return factorial;
       }
 
       /**
@@ -19,13 +24,20 @@ public class LoopFun
        * @return Upper case string of the first letter of each word
        */
       public String acronym(String phrase) {
-          return null;
+          String acronym = "";
+          acronym += phrase.charAt(0);
+          for (int i = 1; i < phrase.length(); i++) {
+              if(phrase.charAt(i) == ' ') {
+                  acronym += phrase.charAt(i+1);
+                }
+            }
+          return acronym.toUpperCase();
       }
 
       /**
        * To prevent anyone from reading our messages, we can encrypt it so it will only be readable by its
        * intended audience. This method encrypt the message by shifting the letter by 3 characters. If the character is
-       * at the end of the alphabet, it will wraps around.
+       * at the end of the alphabet, it will wrap around.
        * For example:
        *  'a' => 'd'
        *  'w' => 'z'
@@ -35,6 +47,27 @@ public class LoopFun
        * @return the encrypted string by shifting each character by three character
        */
       public String encrypt(String word) {
-          return null;
+          String alphabet = "abcdefghijklmnopqrstuvwxyz";
+          String encryptedWord = "";
+          for (int i = 0; i < word.length(); i++) {
+              char letter = word.charAt(i);
+              int encryption = alphabet.indexOf(letter+3);
+              char encryptedLetter = ' '; 
+              // = alphabet.charAt(encryption);
+              //if (encryption == -1) {
+                  switch (letter) {
+                      case 'x': encryptedLetter = 'a';
+                      break;
+                      case 'y': encryptedLetter = 'b';
+                      break;
+                      case 'z': encryptedLetter = 'c';
+                      break;
+                      default: encryptedLetter = alphabet.charAt(encryption);
+                      break;
+                    }
+              //  }
+              encryptedWord += encryptedLetter;
+            }
+          return encryptedWord;
       }
 }

MathUtilities.java

@@ -6,7 +6,7 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public int add(int num1, int num2){
-      return -1;
+      return num1 + num2;
   }
 
   /**
@@ -16,7 +16,7 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public double add(double num1, double num2){
-      return -1;
+      return (double) (num1 + num2);
   }
 
   /**
@@ -25,7 +25,11 @@ public class MathUtilities{
    * @return the half of the number in double
    */
   public double half(int number) {
-      return -1;
+      if (number%2 == 0) {
+          return number/2;
+        } else {
+            return ((double) number)/2;
+        }
   }
 
   /**
@@ -34,7 +38,8 @@ public class MathUtilities{
    * @return true if the number is odd, false if it is even
    */
   public boolean isOdd(int number){
-      return false;
+      boolean x = (number%2 == 0) ? false : true;
+      return x;
   }
 
 
@@ -44,7 +49,7 @@ public class MathUtilities{
    * @return the result of the number multiply by itself
    */
   public int square(int number) {
-      return -1;
+      return (int) Math.pow(number, 2);
   }
 
 }

StringUtilities.java

@@ -1,13 +1,23 @@
 public class StringUtilities {
    public Character getMiddleCharacter(String word){
-       return null;
+       return word.charAt(word.length()/2);
    }
    
    public String removeCharacter(String value, char charToRemove){
-     return null;  
+       String newString = "";
+       for (int i = 0; i < value.length(); i++) {
+           if (value.charAt(i) != charToRemove) {
+               newString += value.charAt(i);
+           }
+       }
+       return newString;
    }
    
    public String getLastWord(String value) {
-       return null;
+       String reversedValue = new StringBuilder(value).reverse().toString();
+       int x = reversedValue.indexOf(' ');
+       String newValue = reversedValue.substring(0,x);
+       newValue = new StringBuilder(newValue).reverse().toString();
+       return newValue;
    }
 }

package.bluej

@@ -2,25 +2,25 @@
 dependency1.from=StringUtilitiesTest
 dependency1.to=StringUtilities
 dependency1.type=UsesDependency
-dependency2.from=BonusTest
-dependency2.to=Bonus
+dependency2.from=LoopFunTest
+dependency2.to=LoopFun
 dependency2.type=UsesDependency
 dependency3.from=MathUtilitiesTest
 dependency3.to=MathUtilities
 dependency3.type=UsesDependency
-editor.fx.0.height=722
+editor.fx.0.height=712
 editor.fx.0.width=876
-editor.fx.0.x=158
-editor.fx.0.y=216
-objectbench.height=164
+editor.fx.0.x=11
+editor.fx.0.y=41
+objectbench.height=181
 objectbench.width=669
 package.divider.horizontal=0.6
-package.divider.vertical=0.7628294036061026
-package.editor.height=543
+package.divider.vertical=0.7112135176651305
+package.editor.height=456
 package.editor.width=567
 package.editor.x=557
-package.editor.y=43
-package.frame.height=779
+package.editor.y=23
+package.frame.height=709
 package.frame.width=693
 package.numDependencies=3
 package.numTargets=6
@@ -40,20 +40,19 @@ target1.width=110
 target1.x=110
 target1.y=150
 target2.height=50
-target2.name=BonusTest
+target2.name=LoopFunTest
 target2.showInterface=false
-target2.type=UnitTestTargetJunit4
-target2.width=80
-target2.x=120
-target2.y=270
-target3.association=BonusTest
+target2.type=ClassTarget
+target2.width=110
+target2.x=10
+target2.y=240
 target3.height=50
-target3.name=Bonus
+target3.name=LoopFun
 target3.showInterface=false
 target3.type=ClassTarget
 target3.width=80
-target3.x=90
-target3.y=300
+target3.x=200
+target3.y=210
 target4.association=MathUtilitiesTest
 target4.height=50
 target4.name=MathUtilities
@@ -74,6 +73,6 @@ target6.height=50
 target6.name=MathUtilitiesTest
 target6.showInterface=false
 target6.type=UnitTestTargetJunit4
-target6.width=100
+target6.width=130
 target6.x=110
 target6.y=40