commit

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

@@ -6,6 +6,8 @@ import java.util.Comparator;
  * @author leon on 11/12/2018.
  */
 public class ComparableTreeSet<_> {
+
+
     public ComparableTreeSet(_... arr) {
     }
 

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

@@ -30,7 +30,7 @@ public class ZipCodeWilmington {
     }
 
     public void lecture(double numberOfHours) {
-
+        student.learn(numberOfHours);
     }
 
     public Map<Student, Double> getStudyMap() {

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

@@ -9,11 +9,13 @@ import java.util.TreeSet;
  * @author leon on 11/12/2018.
  */
 public class GenericUtils {
-    public static <T extends Comparable> Iterable<Iterable<T>> powerSet(Set<T> originalSet) {
+
+    public static <_ extends Comparable> Iterable<? extends Iterable<_>> powerSet(Set<_> originalSet) {
         return null;
     }
 
-    public static <T extends Comparable> Iterable<Iterable<T>> powerSet(T... originalSet) {
+    public static <_ extends Comparable> Iterable<? extends Iterable<_>> powerSet(_... originalSet) {
         return powerSet(new TreeSet<>(Arrays.asList(originalSet)));
    }
 }
+

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

@@ -1,25 +1,39 @@
 package rocks.zipcode.io.quiz4.generics;
 
+import java.util.Iterator;
+import java.util.Stack;
+
 /**
  * @author leon on 11/12/2018.
  */
-public class MyStack<SomeType> {
+public class MyStack<SomeType> implements Iterable {
+    Stack<SomeType> stack;
+
     public MyStack() {
-        throw new UnsupportedOperationException("Method not yet implemented");
+        stack = new Stack<>();
     }
 
     public Boolean isEmpty() {
-        return null;
+        return stack.empty();
     }
 
     public void push(SomeType i) {
+        stack.push(i);
     }
 
     public SomeType peek() {
-        throw new UnsupportedOperationException("Method not yet implemented");
+        if(stack.empty()) {
+            return null;
+        }
+        return stack.peek();
     }
 
     public SomeType pop() {
-        return null;
+        return stack.pop();
+    }
+
+    @Override
+    public Iterator iterator() {
+        return stack.iterator();
     }
 }

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

@@ -1,18 +1,56 @@
 package rocks.zipcode.io.quiz4.generics;
 
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.LinkedList;
+
 /**
  * @author leon on 18/12/2018.
  */
-public class SortedGroup<Type> extends Group<Type> {
+public class SortedGroup<Type> implements GroupInterface {
+    LinkedList sortedList;
+
+    public SortedGroup() {
+        sortedList = new LinkedList<Type>();
+    }
+
+    public Integer indexOf(Type firstValue) {
+        return sortedList.indexOf(firstValue);
+    }
+
     @Override
-    public void insert(Type value) {
+    public Integer count() {
+        return sortedList.size();
     }
 
     @Override
-    public void delete(Type value) {
+    public Boolean has(Object valueToInsert) {
+        return sortedList.contains(valueToInsert);
     }
 
-    public Integer indexOf(Type firstValue) {
-        return null;
+    @Override
+    public Object fetch(int indexOfValue) {
+        return sortedList.get(indexOfValue);
+    }
+
+    @Override
+    public void insert(Object string) {
+        sortedList.add(string);
+    }
+
+    @Override
+    public void delete(Object valueToInsert) {
+        sortedList.remove(valueToInsert);
+    }
+
+    @Override
+    public void clear() {
+        sortedList.clear();
+    }
+
+    @Override
+    public Iterator iterator() {
+        return sortedList.iterator();
     }
 }

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

@@ -4,17 +4,27 @@ package rocks.zipcode.io.quiz4.objectorientation;
  * @author leon on 11/12/2018.
  */
 public class Student {
+    private Integer id;
+    private Double totalStudyTime;
+
     public Student() {
         this(null);
     }
 
     public Student(Integer id) {
+        this.id = id;
+    }
+
+    public Student(Integer id, Double totalStudyTime) {
+        this.id = id;
+        this.totalStudyTime = totalStudyTime;
     }
 
     public void learn(Double amountOfHours) {
+        totalStudyTime += amountOfHours;
     }
 
     public Double getTotalStudyTime() {
-        return null;
+        return this.totalStudyTime;
     }
 }