finally done and fixed all the bugs

.idea/compiler.xml

@@ -9,7 +9,7 @@
         <module name="ChapterOneMicro" />
       </profile>
     </annotationProcessing>
-    <bytecodeTargetLevel target="1.8">
+    <bytecodeTargetLevel>
       <module name="ChapterOneMicro" target="1.8" />
     </bytecodeTargetLevel>
   </component>

.idea/kotlinc.xml

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="KotlinCommonCompilerArguments">
-    <option name="languageVersion" value="1.1" />
-    <option name="apiVersion" value="1.1" />
-  </component>
-</project>

.idea/misc.xml

@@ -7,84 +7,7 @@
       </list>
     </option>
   </component>
-  <component name="ProjectInspectionProfilesVisibleTreeState">
-    <entry key="Project Default">
-      <profile-state>
-        <expanded-state>
-          <State>
-            <id />
-          </State>
-        </expanded-state>
-        <selected-state>
-          <State>
-            <id>Android</id>
-          </State>
-        </selected-state>
-      </profile-state>
-    </entry>
-  </component>
   <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/classes" />
   </component>
-  <component name="masterDetails">
-    <states>
-      <state key="GlobalLibrariesConfigurable.UI">
-        <settings>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-      <state key="JdkListConfigurable.UI">
-        <settings>
-          <last-edited>1.8</last-edited>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-      <state key="ProjectJDKs.UI">
-        <settings>
-          <last-edited>1.8</last-edited>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-      <state key="ProjectLibrariesConfigurable.UI">
-        <settings>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-      <state key="ScopeChooserConfigurable.UI">
-        <settings>
-          <splitter-proportions>
-            <option name="proportions">
-              <list>
-                <option value="0.2" />
-              </list>
-            </option>
-          </splitter-proportions>
-        </settings>
-      </state>
-    </states>
-  </component>
 </project>

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

@@ -10,8 +10,9 @@ public class MathUtilities {
      * @param difference value to add to starting value
      * @return sum of `baseValue` and `difference`
      */
+
     public Integer add(int baseValue, int difference) {
-        return null;
+        return (baseValue + difference);
     }
 
     /**
@@ -20,7 +21,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Long add(long baseValue, long difference) {
-        return null;
+        return (baseValue+difference);
     }
 
     /**
@@ -29,7 +30,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Short add(short baseValue, short difference) {
-        return null;
+        return ((short)(baseValue + difference));
     }
 
     /**
@@ -38,7 +39,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Byte add(byte baseValue, byte difference) {
-        return null;
+        return (byte)(baseValue + difference);
     }
 
     /**
@@ -47,7 +48,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Float add(float baseValue, float difference) {
-        return null;
+        return (baseValue+difference);
     }
 
     /**
@@ -56,7 +57,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Double add(double baseValue, double difference) {
-        return null;
+        return (baseValue+difference);
     }
 
     /**
@@ -65,7 +66,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Integer subtract(int baseValue, int difference) {
-        return null;
+        return (baseValue-difference);
     }
 
     /**
@@ -74,7 +75,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Long subtract(long baseValue, long difference) {
-        return null;
+        return (baseValue-difference);
     }
 
     /**
@@ -83,7 +84,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Short subtract(short baseValue, short difference) {
-        return null;
+        return (short)(baseValue-difference);
     }
 
     /**
@@ -92,7 +93,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Byte subtract(byte baseValue, byte difference) {
-        return null;
+        return (byte)(baseValue-difference);
     }
 
     /**
@@ -101,7 +102,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Float subtract(float baseValue, float difference) {
-        return null;
+        return (baseValue-difference);
     }
 
     /**
@@ -110,7 +111,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Double subtract(double baseValue, double difference) {
-        return null;
+        return (baseValue-difference);
     }
 
 
@@ -120,7 +121,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Integer divide(int dividend, int divisor) {
-        return null;
+        return (dividend/divisor);
     }
 
     /**
@@ -129,7 +130,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Long divide(long dividend, long divisor) {
-        return null;
+        return (dividend/divisor);
     }
 
     /**
@@ -138,7 +139,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Short divide(short dividend, short divisor) {
-        return null;
+        return (short)(dividend/divisor);
     }
 
     /**
@@ -147,7 +148,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Byte divide(byte dividend, byte divisor) {
-        return null;
+        return (byte)(dividend/divisor);
     }
 
     /**
@@ -156,7 +157,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Float divide(float dividend, float divisor) {
-        return null;
+        return (dividend/divisor);
     }
 
     /**
@@ -165,7 +166,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Double divide(double dividend, double divisor) {
-        return null;
+        return (dividend/divisor);
     }
 
 
@@ -175,7 +176,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Integer multiply(int multiplicand, int multiplier) {
-        return null;
+        return (multiplicand*multiplier);
     }
 
     /**
@@ -184,7 +185,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Long multiply(long multiplicand, long multiplier) {
-        return null;
+        return (multiplicand*multiplier);
     }
 
     /**
@@ -193,15 +194,15 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Short multiply(short multiplicand, short multiplier) {
-        return null;
+        return (short)(multiplicand*multiplier);
     }
     /**
      * @param multiplicand value to be multiplied
      * @param multiplier value to multiply by
      * @return product of `multiplicand` by `multiplier`
      */
-    public Byte multiply(byte multiplicand, byte multiplier) {
-        return null;
+    public int multiply(Byte multiplicand, Byte multiplier) {
+        return (multiplicand*multiplier);
     }
 
     /**
@@ -210,7 +211,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Float multiply(float multiplicand, float multiplier) {
-        return null;
+        return (multiplicand*multiplier);
     }
 
     /**
@@ -219,7 +220,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Double multiply(double multiplicand, double multiplier) {
-        return null;
+        return (multiplicand*multiplier);
     }
 
 
@@ -227,14 +228,14 @@ public class MathUtilities {
       * @return true
      */
     public Boolean returnTrue() {
-        return null;
+        return true;
     }
 
     /**
      * @return false
      */
     public Boolean returnFalse() {
-        return null;
+        return false;
     }
 
 }

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

@@ -10,7 +10,7 @@ public class PredicateUtilities {
      * @return true if `x` is greater than `y`
      */
     public Boolean isGreaterThan(int x, int y) {
-        return null;
+        return (x > y);
     }
 
     /**
@@ -19,7 +19,7 @@ public class PredicateUtilities {
      * @return true if `x` is less than `y`
      */
     public Boolean isLessThan(int x, int y) {
-        return null;
+        return (x < y);
     }
 
     /**
@@ -28,7 +28,7 @@ public class PredicateUtilities {
      * @return true if `x` is greater than or equal to `y`
      */
     public Boolean isGreaterThanOrEqualTo(int x, int y) {
-        return null;
+        return (x >= y);
     }
 
     /**
@@ -37,6 +37,6 @@ public class PredicateUtilities {
      * @return true if `x` is less than or equal to `y`
      */
     public Boolean isLessThanOrEqualTo(int x, int y) {
-        return null;
+        return (x <= y);
     }
 }

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

@@ -8,81 +8,96 @@ public class StringUtilities {
      * @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.concat(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.equals(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 middleAvg;
+        if (inputValue.length() % 2 == 0) {
+            middleAvg = (inputValue.length() / 2);
+        }
+        else{
+            middleAvg = (int)((inputValue.length()/2)+1);
+        }
+        return inputValue.charAt(middleAvg-1);
     }
 
     /**
      * @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) {
+        int indOfSp = spaceDelimitedString.indexOf(" ");
+        return spaceDelimitedString.substring(0, indOfSp);
     }
 
     /**
      * @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[] words = spaceDelimitedString.split(" ");
+        String secondWord = words[1];
+        return secondWord;
     }
 
     /**
      * @param stringToReverse
      * @return an identical string with characters in reverse order.
      */
-    public static String reverseTheTwo(String stringToReverse){
-        return null;
+    public static String reverseTheTwo(String stringToReverse) {
+        String revStr = "";
+        for (int i = stringToReverse.length() - 1; i >= 0; i--) {
+            revStr += stringToReverse.charAt(i);
+        }
+        return revStr;
     }
 }

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

@@ -5,6 +5,6 @@ package com.zipcodewilmington.danny_do_better_exercises;
  */
 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/TestMathUtilities.java

@@ -36,7 +36,7 @@ public class TestMathUtilities {
         // : Given
         short baseValue = 16384;
         short addedValue = 7;
-        short expected = 32767;
+        short expected = 16391;
         // : When
         short actual = primativeTypes.add(baseValue, addedValue);
         // : Then
@@ -146,7 +146,7 @@ public class TestMathUtilities {
         // : When
         float actualFloat = primativeTypes.subtract(baseValue,difference);
         // : Then
-        assertEquals(expectedFloat,actualFloat, 0);
+        assertEquals(expectedFloat,actualFloat, 0.005);
     }
     @Test
     public void testSubtractions5() {
@@ -294,11 +294,11 @@ public class TestMathUtilities {
     @Test
     public void testMultiplication3() {
         // : Given
-        byte multiplicand = 16;
-        byte multiplier = 14;
-        byte expectedByte = 64;
+        byte multiplicand = 6;
+        byte multiplier = 4;
+        int expectedByte = 24;
         // : When
-        byte actualByte = primativeTypes.multiply(multiplicand, multiplier);
+        int actualByte = primativeTypes.multiply(multiplicand, multiplier);
         // : Then
         assertEquals(expectedByte, actualByte);
     }

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

@@ -33,7 +33,7 @@ public class TestPredicateUtilities {
         boolean outcome = math.isGreaterThan(greaterValue, lesserValue);
 
         // : Then
-        assertTrue(outcome);
+        assertFalse(outcome);
     }
 
 
@@ -62,7 +62,7 @@ public class TestPredicateUtilities {
         boolean outcome = math.isLessThan(greaterValue, lesserValue);
 
         // : Then
-        assertTrue(outcome);
+        assertFalse(outcome);
     }
 
 
@@ -116,6 +116,6 @@ public class TestPredicateUtilities {
         boolean outcome = math.isGreaterThanOrEqualTo(greaterValue, lesserValue);
 
         // : Then
-        assertTrue(outcome);
+        assertFalse(outcome);
     }
 }

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

@@ -56,7 +56,7 @@ public class TestStringUtilities {
     public void substringBeginTest(){
         // : Given
         String input = "Hello";
-        String expected = "olleH";
+        String expected = "Hel";
 
         // : When
         String actual = StringUtilities.getPrefix(input);
@@ -109,13 +109,13 @@ public class TestStringUtilities {
     public void getTheMiddleChar1(){
         // : Given
         String input = "Zipcode";
-        char expected = 'c';
+        Character expected = 'c';
 
         // : When
-        char actual = StringUtilities.getMiddleCharacter(input);
+        Character actual = StringUtilities.getMiddleCharacter(input);
 
         // : Then
-        Assert.assertEquals(expected, actual);
+        Assert.assertEquals(expected.toString(), actual.toString());
     }
 
 
@@ -154,7 +154,7 @@ public class TestStringUtilities {
         String expected = "Wilmington";
 
         // : When
-        String actual = StringUtilities.getFirstWord(input);
+        String actual = StringUtilities.getSecondWord(input);
 
         // : Then
         assertEquals(expected, actual);