DONE

ChapterOneMicro.iml

     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Maven: junit:junit:4.12" level="project" />
-    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" scope="TEST" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
   </component>
 </module>

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

      * @return `Hello World` as a string
      */
     public static String getHelloWorld() {
-        return null;
+
+        return "Hello World";
     }
 
     /**
-     * @param firstSegment a string to be added to
+     * @param firstSegment  a string to be added to
      * @param secondSegment a string to add
      * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
      */
-    public static String concatenation(String firstSegment, String secondSegment){
-        return null;
+    public static String concatenation(String firstSegment, String secondSegment) {
+
+        return firstSegment + secondSegment;
     }
 
     /**
-     * @param firstSegment a string to be added to
+     * @param firstSegment  a string to be added to
      * @param secondSegment a string to add
      * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment`
      */
-    public static String concatenation(int firstSegment, String secondSegment){
-        return null;
+    public static String concatenation(int firstSegment, String secondSegment) {
+
+        return firstSegment + secondSegment;
     }
 
     /**
      * @param input a string to be manipulated
      * @return the first 3 characters of `input`
      */
-    public static String getPrefix(String input){
-        return null;
+    public static String getPrefix(String input) {
+
+        return input.substring(0, 3);
     }
 
     /**
      * @param input a string to be manipulated
      * @return the last 3 characters of `input`
      */
-    public static String getSuffix(String input){
-        return null;
+    public static String getSuffix(String input) {
+
+        return input.substring(input.length() - 3, input.length());
     }
 
     /**
-     * @param inputValue the value to be compared
+     * @param inputValue      the value to be compared
      * @param comparableValue the value to be compared against
      * @return the equivalence of two strings, `inputValue` and `comparableValue`
      */
-    public static Boolean compareTwoStrings(String inputValue, String comparableValue){
-        return null;
+    public static Boolean compareTwoStrings(String inputValue, String comparableValue) {
+
+        return inputValue.equalsIgnoreCase(comparableValue);
     }
 
     /**
      * @param inputValue the value input from user
      * @return the middle character of `inputValue`
      */
-    public static Character getMiddleCharacter(String inputValue){
-        return null;
+    public static Character getMiddleCharacter(String inputValue) {
+        int length;
+        int position;
+        if (inputValue.length() % 2 == 0) {
+            position = inputValue.length() / 2 - 1;
+            length = 2;
+        } else {
+            position = inputValue.length() / 2;
+            length = 1;
+        }
+        return inputValue.charAt(position);
     }
 
     /**
      * @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 answer = "";
+
+        for (int i = 0; i < spaceDelimitedString.length(); i++) {
+            if (spaceDelimitedString.charAt(i) == ' ') {
+                answer = spaceDelimitedString.substring(0, i);
+            }
+        }
+
+        return answer;
     }
 
+
     /**
      * @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;
+    public static String getSecondWord(String spaceDelimitedString) {
+        String[] answer = spaceDelimitedString.split(" ");
+
+
+        return answer[1];
     }
 
+
     /**
      * @param stringToReverse
      * @return an identical string with characters in reverse order.
      */
-    public static String reverse(String stringToReverse){
-        return null;
+    public static String reverse(String stringToReverse) {
+
+        String reverse = "";
+
+        for (int i = stringToReverse.length() - 1; i >= 0; i--) {
+            reverse = reverse + stringToReverse.charAt(i);
+        }
+        return reverse;
     }
 }