Refactored Math

src/main/java/com/zipcodewilmington/danny_do_better_exercises/MathUtilities.java

 package com.zipcodewilmington.danny_do_better_exercises;
 
 /**
- * Created by dan on 6/14/17.
+ * Refactored
  */
 public class MathUtilities {
 
-
     public Integer add(int baseValue, int difference) {
-        int add = baseValue + difference;
-        return add;
+        return baseValue + difference;
     }
 
     public Long add(long baseValue, long difference) {
-        long add = baseValue + difference;
-        return add;
+        return baseValue + difference;
     }
 
     public Short add(short baseValue, short difference) {
         int sum = baseValue + difference;
-        short shortSum = (short) sum;
-        return shortSum;
+        return (short) sum;
     }
 
     public Byte add(byte baseValue, byte difference) {
         int sum = baseValue + difference;
-        byte byteSum = (byte) sum;
-        return byteSum;
+        return (byte) sum;
     }
 
     public Float add(float baseValue, float difference) {
-       float add = baseValue + difference;
-        return add;
+        return baseValue + difference;
     }
 
     public Double add(double baseValue, double difference) {
-        double add = baseValue + difference;
-        return add;
+        return baseValue + difference;
     }
 
     public Integer subtract(int baseValue, int difference) {
-        int subtract = baseValue - difference;
-        return subtract;
+        return baseValue - difference;
     }
 
     public Long subtract(long baseValue, long difference) {
-        long subtract = baseValue - difference;
-        return subtract;
+        return baseValue - difference;
     }
 
     public Short subtract(short baseValue, short difference) {
         int sum = baseValue - difference;
-        short shortSum = (short) sum;
-        return shortSum;
-
+        return (short) sum;
     }
 
     public Byte subtract(byte baseValue, byte difference) {
         int sum = baseValue - difference;
-        byte byteSum = (byte) sum;
-        return byteSum;
-
+        return (byte) sum;
     }
 
     public Float subtract(float baseValue, float difference) {
-        float subtract = baseValue - difference;
-        return subtract;
+        return baseValue - difference;
     }
 
     public Double subtract(double baseValue, double difference) {
-        double subtract = baseValue - difference;
-        return subtract;
+        return baseValue - difference;
     }
 
     public Integer divide(int dividend, int divisor) {
-        int divide = dividend / divisor;
-        return divide;
+        return dividend / divisor;
     }
 
     public Long divide(long dividend, long divisor) {
-        long divide = dividend / divisor;
-        return divide;
-
+        return dividend / divisor;
     }
 
     public Short divide(short dividend, short divisor) {
         int sum = dividend / divisor;
-        short shortSum = (short) sum;
-        return shortSum;
-
+        return (short) sum;
     }
 
     public Byte divide(byte dividend, byte divisor) {
         int sum = dividend / divisor;
-        byte byteSum = (byte) sum;
-        return byteSum;
-
+        return (byte) sum;
     }
 
     public Float divide(float dividend, float divisor) {
-        float divide = dividend / divisor;
-        return divide;
-
+        return dividend / divisor;
     }
 
     public Double divide(double dividend, double divisor) {
-        double divide = dividend / divisor;
-        return divide;
-
+        return dividend / divisor;
     }
 
     public Integer multiply(int multiplicand, int multiplier) {
-        int multiply = multiplicand * multiplier;
-        return multiply;
+        return multiplicand * multiplier;
     }
 
     public Long multiply(long multiplicand, long multiplier) {
-        long multiply = multiplicand * multiplier;
-        return multiply;
+        return multiplicand * multiplier;
     }
 
     public Short multiply(short multiplicand, short multiplier) {
         int sum = multiplicand * multiplier;
-        short shortSum = (short) sum;
-        return shortSum;
+        return (short) sum;
     }
 
     public Byte multiply(byte multiplicand, byte multiplier) {
         int sum = multiplicand * multiplier;
-        byte byteSum = (byte) sum;
-        return byteSum;
+        return (byte) sum;
     }
 
     public Float multiply(float multiplicand, float multiplier) {
-        float multiply = multiplicand * multiplier;
-        return multiply;
+        return multiplicand * multiplier;
     }
 
     public Double multiply(double multiplicand, double multiplier) {
-        double multiply = multiplicand * multiplier;
-        return multiply;
-
+        return multiplicand * multiplier;
     }
 
     public Boolean returnTrue() {
-        if (20 < 100) {
-            return true;
-        }
-        else {
-            return false;
-        }
+        return true;
     }
 
     public Boolean returnFalse() {
-        if (69 >= 9000) {
-            return true;
-        } else {
-            return false;
-        }
-
+        return false;
     }
-
-}
+}

src/main/java/com/zipcodewilmington/danny_do_better_exercises/StringUtilities.java

         return inputValue.equals(comparableValue) ;
     }
 
-    /**
-     * @param inputValue the value input from user
-     * @return the middle character of `inputValue`
-     */
     public static Character getMiddleCharacter(String inputValue){
-
-        return input;
+        int length = inputValue.length();
+        int middleIndex = length / 2;
+        if (middleIndex % 2 == 0){
+            middleIndex = middleIndex - 1;
+        }
+        char middleCharacter = inputValue.charAt(middleIndex);
+        return middleCharacter;
     }
 
-    /**
-     * @param spaceDelimitedString a string, representative of a sentence, containing spaces
-     * @return the first sequence of characters
-     */
-    public static String getFirstWord(String spaceDelimitedString){
-        return null;
+    public static String getFirstWord(String spaceDelimitedString) {
+        String[] firstWord = spaceDelimitedString.split(" ");
+        return firstWord[0];
     }
 
-    /**
-     * @param spaceDelimitedString a string delimited by spaces
-     * @return the second word of a string delimited by spaces.
-     */
     public static String getSecondWord(String spaceDelimitedString){
-        return null;
+        String[]secondWord = spaceDelimitedString.split( " ");
+        return secondWord[1];
     }
 
-    /**
-     * @param stringToReverse
-     * @return an identical string with characters in reverse order.
-     */
     public static String reverseTheTwo(String stringToReverse){
-        return null;
+
+        String reverse = new StringBuffer(stringToReverse).reverse().toString();
+
+        return reverse;
     }
 }

src/main/java/com/zipcodewilmington/danny_do_better_exercises/ZipcodeRocks.java

  */
 public class ZipcodeRocks {
     public static void main(String[] args) {
-    System.out.println("Zipcode Rocks!");
+
+        System.out.println("Zipcode Rocks!");
     }
 }

src/test/java/com/zipcodewilmington/danny_do_better_exercises/TestStringUtilities.java

         String expected = "Wilmington";
 
         // : When
-        String actual = StringUtilities.getFirstWord(input);
+        String actual = StringUtilities.getSecondWord(input);
 
         // : Then
         assertEquals(expected, actual);