yup

LoopFun.java

@@ -8,7 +8,14 @@ public class LoopFun
        * @return the factorial of the number
        */
       public int factorial(int number){
-          return -1;
+          int i = number;
+          int factorial = 5;
+          
+          while (i > 1) {
+            i--;
+            factorial = i * factorial;
+        };
+          return factorial;
       }
 
       /**
@@ -19,7 +26,15 @@ public class LoopFun
        * @return Upper case string of the first letter of each word
        */
       public String acronym(String phrase) {
-          return null;
+          int i = 0;
+          String[] splitem = phrase.split("\\s+");
+          int length = splitem.length - 1;
+          String acronym = "";
+          
+          while (i < length) {
+          acronym += "" + splitem[i].toUpperCase();
+        }
+        return acronym;
       }
 
       /**
@@ -35,6 +50,19 @@ public class LoopFun
        * @return the encrypted string by shifting each character by three character
        */
       public String encrypt(String word) {
-          return null;
+          String decode = "";
+          char convert;
+          
+          char[] wurd = word.toCharArray();
+          
+          for (int i = 0; i < word.length(); i++) {
+              
+              while (Character.isLetter(wurd[i])) {
+                  convert = (wurd[i] + 3 - (int)'a') % 26 + (int)'a';
+                  decode += "" + convert;
+                }}
+                
+              String decoded = String.valueOf(convert);
+              return decoded;
       }
 }

MathUtilities.java

@@ -1,3 +1,7 @@
+import java.util.*;
+
+import java.text.DecimalFormat;
+
 public class MathUtilities{
   /**
    * Add two number together
@@ -6,7 +10,8 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public int add(int num1, int num2){
-      return -1;
+      int solution = num1 + num2;
+      return solution;
   }
 
   /**
@@ -16,7 +21,8 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public double add(double num1, double num2){
-      return -1;
+       double solution = num1 + num2;
+       return solution;
   }
 
   /**
@@ -25,7 +31,11 @@ public class MathUtilities{
    * @return the half of the number in double
    */
   public double half(int number) {
-      return -1;
+      double ohokay = number / 2;
+      DecimalFormat solution = new DecimalFormat(".#");
+      String theone = solution.format(ohokay);
+      double answer = (double) ohokay;
+      return answer;
   }
 
   /**
@@ -34,7 +44,8 @@ public class MathUtilities{
    * @return true if the number is odd, false if it is even
    */
   public boolean isOdd(int number){
-      return false;
+      if ((number % 2) != 0) {
+                return true;} else { return false;}
   }
 
 
@@ -44,7 +55,8 @@ public class MathUtilities{
    * @return the result of the number multiply by itself
    */
   public int square(int number) {
-      return -1;
+      int solution = number * number;
+      return solution;
   }
 
 }

StringUtilities.java

@@ -1,13 +1,31 @@
 public class StringUtilities {
    public Character getMiddleCharacter(String word){
-       return null;
-   }
+        if (word.length() % 2 != 0) {int length = word.length() - 1;
+        int middle = length / 2;
+        String math = String.valueOf(middle + 1);
+        int halfway = Integer.valueOf(math);
+        String thechar = word.substring(halfway - 1, halfway);
+        char itsthechar = thechar.charAt(0);
+        return itsthechar;} else {
+            
+        int length = word.length();
+        int middle = length / 2;
+        String math = String.valueOf(middle + 1);
+        int halfway = Integer.valueOf(math);
+        String thechar = word.substring(halfway - 1, halfway);
+        char itsthechar = thechar.charAt(0);
+        return itsthechar;    
+   }}
    
    public String removeCharacter(String value, char charToRemove){
-     return null;  
+      String thechar = String.valueOf(charToRemove);
+      String format = value.replaceAll(thechar,"");
+      return format;
    }
    
    public String getLastWord(String value) {
-       return null;
+       String[] splitem = value.split("\\s+");
+       int length = splitem.length;
+       return splitem[length-1];
    }
 }