almost

src/main/java/rocks/zipcode/io/quiz4/collections/ComparableTreeSet.java

@@ -1,9 +1,15 @@
 package rocks.zipcode.io.quiz4.collections;
 
+import java.util.Arrays;
+import java.util.TreeSet;
+
 /**
  * @author leon on 11/12/2018.
  */
-public class ComparableTreeSet<_> {
+public class ComparableTreeSet<_> extends TreeSet<_> implements Comparable<_> {
+
+    private TreeSet<_> treeSet = new TreeSet<>();
+
     public ComparableTreeSet(_... arr) {
     }
 
@@ -11,7 +17,19 @@ public class ComparableTreeSet<_> {
     public ComparableTreeSet() {
     }
 
-    public Integer compareTo(ComparableTreeSet<_> o) {
-        return null;
+
+    public int compareTo(ComparableTreeSet<_> o) {
+
+        return 0;
+    }
+
+    @Override
+    public int compareTo(_ o) {
+        return 0;
+    }
+
+    @Override
+    public String toString() {
+        return treeSet.toString();
     }
 }

src/main/java/rocks/zipcode/io/quiz4/collections/SimpleStringGroup.java

@@ -1,12 +1,13 @@
 package rocks.zipcode.io.quiz4.collections;
 
 import java.util.ArrayList;
+import java.util.Iterator;
 import java.util.List;
 
 /**
  * @author leon on 11/12/2018.
  */
-public class SimpleStringGroup {
+public class SimpleStringGroup implements Iterable {
 
     private List<String> group = new ArrayList<>();
     private Iterable<String> test = group;
@@ -47,4 +48,9 @@ public class SimpleStringGroup {
     public void clear() {
         group.clear();
     }
+
+    @Override
+    public Iterator iterator() {
+        return group.iterator();
+    }
 }

src/main/java/rocks/zipcode/io/quiz4/collections/ZipCodeWilmington.java

@@ -2,24 +2,37 @@ package rocks.zipcode.io.quiz4.collections;
 
 import rocks.zipcode.io.quiz4.objectorientation.Student;
 
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
 /**
  * @author leon on 11/12/2018.
  */
-public class ZipCodeWilmington {
-    public void enroll(Student student) {
+public class ZipCodeWilmington extends Student {
+
+    private List<Student> cohort = new ArrayList<>();
+    private Map<Student, Double> cohort2 = new HashMap<>();
 
+    public void enroll(Student student) {
+        cohort.add(student);
     }
 
     public Boolean isEnrolled(Student student) {
-        return null;
+        return cohort.contains(student);
     }
 
     public void lecture(double numberOfHours) {
+        for(Student student : cohort){
+            student.learn(numberOfHours);
+        }
     }
 
     public Map<Student, Double> getStudyMap() {
-        return null;
+        for (Student student : cohort){
+            cohort2.put(student, student.getTotalStudyTime());
+        }
+        return cohort2;
     }
 }

src/main/java/rocks/zipcode/io/quiz4/generics/GenericUtils.java

@@ -1,14 +1,13 @@
 package rocks.zipcode.io.quiz4.generics;
 
-import java.util.Arrays;
-import java.util.Set;
-import java.util.TreeSet;
+import java.util.*;
 
 /**
  * @author leon on 11/12/2018.
  */
 public class GenericUtils {
     public static <_ extends Comparable> Iterable<Iterable<_>> powerSet(Set<_> originalSet) {
+
         return null;
     }
 

src/main/java/rocks/zipcode/io/quiz4/generics/Group.java

@@ -1,23 +1,18 @@
 package rocks.zipcode.io.quiz4.generics;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Iterator;
 import java.util.List;
 
 /**
  * @author leon on 18/12/2018.
  */
-public class Group<_>{
+public class Group<_> implements Iterable<_>, GroupInterface<_>{
 
     List<_> group = new ArrayList<>();
-    Iterable<_> list = group;
 
     public Group() {
-        try {
-            throw new UnsupportedOperationException("Method not yet implemented");
-        }catch (UnsupportedOperationException uoe){
-            uoe.printStackTrace();
-        }
     }
 
     public Integer count() {
@@ -48,4 +43,9 @@ public class Group<_>{
         Iterator<_> list = group.iterator();
         return list;
     }
+
+    @Override
+    public String toString() {
+        return Arrays.toString(group.toArray());
+    }
 }

src/main/java/rocks/zipcode/io/quiz4/generics/MyStack.java

@@ -1,35 +1,31 @@
 package rocks.zipcode.io.quiz4.generics;
 
+import java.util.Iterator;
+import java.util.Spliterator;
 import java.util.Stack;
+import java.util.function.Consumer;
 
 /**
  * @author leon on 11/12/2018.
  */
-public class MyStack<SomeType> {
+public class MyStack<SomeType> implements Iterable<SomeType>{
 
     private Stack<SomeType> myStack = new Stack<>();
 
     public MyStack() {
-        try {
-            throw new UnsupportedOperationException("Method not yet implemented");
-        } catch (UnsupportedOperationException uoe){
-            uoe.printStackTrace();
-        }
     }
 
     public Boolean isEmpty() {
         return myStack.isEmpty();
     }
 
-    public void push(SomeType i) {
-        myStack.push(i);
+    public void push(SomeType i){
+            myStack.push(i);
     }
 
     public SomeType peek() {
-        try {
-            throw new UnsupportedOperationException("Method not yet implemented");
-        } catch (UnsupportedOperationException uoe){
-            uoe.printStackTrace();
+        if (myStack.isEmpty()){
+            return null;
         }
         return myStack.peek();
     }
@@ -37,4 +33,9 @@ public class MyStack<SomeType> {
     public SomeType pop() {
         return myStack.pop();
     }
+
+    @Override
+    public Iterator<SomeType> iterator() {
+        return myStack.iterator();
+    }
 }

src/main/java/rocks/zipcode/io/quiz4/generics/SortedGroup.java

@@ -1,11 +1,16 @@
 package rocks.zipcode.io.quiz4.generics;
 
+import javafx.collections.ObservableList;
+import javafx.collections.transformation.SortedList;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
 /**
  * @author leon on 18/12/2018.
  */
-public class SortedGroup<_> extends Group<_> {
-
-
+public class SortedGroup<_> extends Group<_> implements Iterable<_>, GroupInterface<_>{
 
     @Override
     public void insert(_ value) {

src/main/java/rocks/zipcode/io/quiz4/objectorientation/PalindromeObject.java

@@ -5,21 +5,23 @@ import rocks.zipcode.io.quiz4.fundamentals.PalindromeEvaluator;
 /**
  * @author leon on 18/12/2018.
  */
-public class PalindromeObject {
+public class PalindromeObject extends PalindromeEvaluator {
+    private Object input;
     public PalindromeObject(String input) {
+        this.input = input;
     }
 
     public String[] getAllPalindromes(){
 
-        return null;
+        return getAllPalindromes((String) input);
     }
 
     public Boolean isPalindrome(){
-        return null;
+        return isPalindrome((String) input);
     }
 
     public String reverseString(){
 
-        return null;
+        return reverseString((String) input);
     }
 }

src/main/java/rocks/zipcode/io/quiz4/objectorientation/StringAssembler.java

@@ -4,7 +4,17 @@ package rocks.zipcode.io.quiz4.objectorientation;
  * @author leon on 11/12/2018.
  */
 public class StringAssembler {
+
+    String str;
+    StringBuilder sb = new StringBuilder();
+    private Character delimeter;
+
+    public StringAssembler(String str) {
+        this.str = str;
+    }
+
     public StringAssembler(Character delimeter) {
+        this.delimeter = delimeter;
     }
 
     public StringAssembler append(String str) {