SimpleString done

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

@@ -1,17 +1,35 @@
 package rocks.zipcode.io.quiz4.collections;
 
+import java.util.TreeSet;
+
 /**
  * @author leon on 11/12/2018.
  */
-public class ComparableTreeSet<_> {
-    public ComparableTreeSet(_... arr) {
-    }
+public class ComparableTreeSet<T> implements Comparable<T> {
 
+    TreeSet<T> treeSet;
+
+    public ComparableTreeSet(T... arr) {
+        for(T item: arr){
+            treeSet.add(item);
+        }
+    }
 
     public ComparableTreeSet() {
     }
 
-    public Integer compareTo(ComparableTreeSet<_> o) {
-        return null;
+    public Integer compareTo(ComparableTreeSet<T> o) {
+
+        return 0;
+    }
+
+    public TreeSet<T> getTreeSet() {
+        return treeSet;
+    }
+
+    @Override
+    public int compareTo(T o) {
+
+        return 0;
     }
 }

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

@@ -1,31 +1,58 @@
 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<String> {
+
+    List<String> strList;
+
     public SimpleStringGroup() {
-        throw new UnsupportedOperationException("Method not yet implemented");
+        this.strList = new ArrayList<>();
     }
 
     public Integer count() {
-        return null;
+
+        return this.strList.size();
     }
 
     public void insert(String string) {
+
+        this.strList.add(string);
+
     }
 
     public Boolean has(String valueToInsert) {
-        return null;
+
+        for(String s: this.strList){
+            if(s.equals(valueToInsert)) {
+                return true;
+            }
+        }
+
+        return false;
     }
 
     public String fetch(int indexOfValue) {
-        return null;
+
+        return this.strList.get(indexOfValue);
     }
 
     public void delete(String valueToInsert) {
+
+        this.strList.remove(valueToInsert);
     }
 
     public void clear() {
+        this.strList = new ArrayList<>();
+    }
+
+    @Override
+    public Iterator<String> iterator() {
+        return this.strList.iterator();
     }
 }

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

@@ -2,12 +2,23 @@ package rocks.zipcode.io.quiz4.collections;
 
 import rocks.zipcode.io.quiz4.objectorientation.Student;
 
+import java.util.List;
 import java.util.Map;
 
 /**
  * @author leon on 11/12/2018.
  */
 public class ZipCodeWilmington {
+
+    List<Student> cohort;
+
+    public ZipCodeWilmington(List<Student> cohort) {
+        this.cohort = cohort;
+    }
+
+    public ZipCodeWilmington() {
+    }
+
     public void enroll(Student student) {
     }